Appendix - Details of Business Inputs with Opportunities for Improvement and Credible Failure Modes

This appendix organises validation workshop ‘Opportunities for Improvement’ (OFI) by Business Input and links these to specific Credible Failure Modes. This resource assists Vehicle Interaction Control Improvement planning by grouping Opportunities for Improvement into categories that can be reviewed for relevance, priority, links, and project sequencing. Each suggested OFI for site work processes and practices (Business Inputs) can be considered by senior personnel by asking:

  1. Is the Opportunity for Improvement (OFI) relevant and practical?
  2. Will it deliver value?
  3. Can it be implemented and maintained efficiently?
  4. Will it improve the current site Business Inputs that prevent or mitigate the linked Credible Failure Mode from compromising the relevant Required Operating States?
The table present the OFI or Opportunities for Improvement in the context of the Business Input in which they apply. The Credible Failure Mode column is intended to provide context on the issues which are more likely to occur while the business input is in need of improvement.
Opportunity BI Name BI Expectation Specify Implement Monitor Related Credible Failure Mode(s)
OFI-101: Resolve document reference duplicates for different GHG operations. BI-CDA.03 There is an appropriate and up-to-date training management system

A process should be in place for delivering and maintaining competency-based training to provide skilled personnel for all roles on site.

The training management system:

  • Matches skills to roles e.g. through a training needs analysis
  • Presents information that is appropriate for the audience
  • Confirms requirements for safe and productive operations
  • Assesses competency e.g. through written and practical tests
  • Requires ongoing maintenance of skills for operational, design, planning, and leadership role holders

Procedure, Competence, Training and Assessment HSMP 4.2 PR V12 4/6/24 – S6.1 Identify training needs taking a risk-based approach and prepare a TNA for each role in a Department. 6.1.9 Competent people to be engaged to prepare and administer TNAs.  S6.2 All people to be Trained and Competent. S6.3 to 6.6 People to be appointed after inducted and if needed have First aid and other non-technical skills. S6.7 and 6.8 Manage training and keep records.

OFI-101 Resolve document reference duplicates for different GHG operations

Consultant Comment: During ‘work as documented’ mapping for Tarkwa, documents for Damang were also provided. Some of these had duplicate or similar titles.

If these duplicate or similar documents are accessible by decision makers at both sites then choosing the incorrect document could result in site inappropriate design or planning decisions.

Review how the document information protocol applies to documents across all GHG operations. Identify situations where common standards apply and where site specific approaches apply and update document management processes.

  • Appropriately qualified trainers deliver well-structured training.
  • Regular refresher training and self-learning activities are planned and executed to maintain currency of skills for all personnel on site
  • Reports are generated from the training management system to confirm employee competence and skill levels.
  • Audits and challenge tests are conducted to confirm standards of skill development and maintenance are in place.
CFM-CDA.06.02 Operator drives vehicle at the incorrect speed (too fast or too slow). CFM-CPA.10.02 Operators unaware of give way requirements for light vehicles CFM-CPA.10.04 Operators unaware of right of way requirements or operating constraints CFM-CPA.10.20 Operators of heavy and light vehicles (or pedestrians) fail to follow the designated travel path CFM-CPA.11.01 Equipment operator or pedestrian mistake in estimating clearance distance CFM-CPA.11.03 Operators and/or passengers do not use fitted seatbelts or restraints CFM-CPA.11.05 Operator does not drive on available segregated roads CFM-CPA.11.10 Operators or co-workers have required communications equipment but are not contactable CFM-CPV.11.20 Operators or passenger has limb outside cabin while travelling CFM-CRA.03.01 Operator fails to identify and act on changes in conditions: reduced visibility, road narrowing, road surface etc. CFM-CRA.03.20 Personnel do not manage heavy vehicle blind spots CFM-CRA.03.21 Incorrect action on vehicle system alarm – not understood CFM-CRA.11.21 No action taken on over speed alarm CFM-EPA.31.20 Equipment or component failure during operations e.g. brakes or steering or controlled functions CFM-EPA.32.06 Loose objects in cabin or around vehicle remain unsecured CFM-EPA.33.40 Communication equipment absence, failure or poor reception CFM-EPV.26.10 Routine or occasional overloading of vehicles CFM-LPA.44.05 Appropriate distances from fixed and overhead structures are not maintained CFM-LPV.44.02 Operational personnel do not maintain minimum standards for berms, windrows and other zone protection. CFM-LPV.54 Excessive water (Dust Control) is applied to road surface CFM-MPA.63.01 Operator does not meet site requirements when parking CFM-MPA.63.02 Vehicle operator does not check pathway after being parked CFM-MPA.66.01 Incorrect communication protocol CFM-MPA.72.02 Operational access control (pedestrian and vehicle) is inadequate CFM-MPA.72.03 Mobile equipment operator or pedestrian does not notify when entering a controlled work area CFM-MPV.63.02 Light vehicles stop or park in heavy vehicle blind spots
OFI-170: Review provision of resting rooms for fatigue management. BI-CDA.09.01 Fit for work processes with specific advice on self-management

Operating sites should develop and maintain processes that support personnel to be both fit for work and to maintain a healthy work-life balance.

Personnel are trained in how to manage shift work and other workplace demands. The training covers site requirements for: 

  • Managing and reporting impairment e.g. caused by fatigue, medication, illness etc.
  • Impairment screening e.g. alcohol and other drug screening  
  • Mental health and wellness goals

Training and assessment carried out to schedule. Health and wellness self-management information is provided. Routine reinforcement of site impairment management expectations and processes.

Fatigue Management Procedure TGM.1.20.09 WI V9 01/07/2022 – Reinforces requirements for using and reacting to Guardvant fatigue events.  Radio call of SAFETY-SAFETY-SAFETY and call truck number for stop until the supervisor can attend.

OFI-170 Review provision of resting rooms for fatigue management.

Managing fatigue in mining operations is a challenge for all continuous mining operations. Effective management of fatigues requires a whole of system approach that can include providing comfortable locations for taking fatigue breaks.

Workshop participants discussed Business Partner processes for taking fatigue breaks noting that there are limited options for short rests.

Review the benefits of providing dedicated resting rooms for fatigued mobile equipment operators.

Confirmation that fit for work training and awareness is completed to schedule and that work area references are available. Fatigue monitoring technology, incident reviews.

CFM-CPA.11.02 Impaired or inattentive operator operates mobile equipment CFM-CRA.04.30 Operators change behaviour after fatigue alerting system is fitted CFM-CTA.11.01 Supervisor does not identify or act when operator is fatigued or intoxicated CFM-ERA.33.40 In vehicle fatigue monitoring and alerting system fails CFM-SDA.83 Organisation Work Scheduling and Planning is inadequate CFM-SDA.86 Work Environment and Work Demands result in Fatigued Mobile Equipment Operators or other Health Affects
OFI-170: Review provision of resting rooms for fatigue management. OFI-169: Review site processes for tracking and monitoring hours worked. OFI-171: Consider benchmarking Tarkwa shift rosters against other operations. OFI-102: Review and formalise escalating responses for operator alertness detected by OAS. BI-CPA.09.01 Site fatigue management processes are comprehensive and optimise work rosters

Site fatigue management processes are comprehensive and designed to support employees.  

Site fatigue management processes include:

  • Education and awareness packages for shift workers 
  • Optimum shift roster design
  • Hours of work and rest requirements including travel time
  • Additional work hours management
  • Advice and support for supervisors to remove fatigued persons from the workplace e.g. prestart fitness for work judgments,
  • Fatigue call ups during shift

OFI-171 Consider benchmarking Tarkwa shift rosters against other operations.

Managing fatigue in mining operations is a challenge for all continuous mining operations. Effective management of fatigues requires a whole of system approach that includes the design of shift rosters.

Workshop participants discussed the shift rosters deployed by Tarkwa Mine Business Partners and identified an opportunity benchmark against how other operations manage shift rosters to manage fatigue.

Benchmark Tarkwa shift rosters against other Gold Fields operations, consider duration, cycle sequence, time off, number of panels etc.

OFI-102 Review and formalise escalating responses for operator alertness detected by OAS.

Tarkwa Mine has installed Operator Alert System (OAS) technology and has an onsite monitoring control room. The technology and supporting processes are mature and fully operationally integrated at site.

Workshop participants confirmed that OAS technology is a significant vehicle interaction control in continuous mining operation. However, their discussion and review of procedures that escalating responses based on lapses in operator alertness are not in the procedure and are not included in OAS operator training materials. There is a response protocol is detailed in poster format for OAS monitoring staff and is applied routinely.

The Tarkwa OAS and supporting practices set a Gold Fields benchmark. Consider reviewing and updating all supporting procedures and training modules so that they capture site practice for responding to differing levels of alertness detected in-field personnel.

Compare industry good practice to current site approaches covering:

Work Hours Policy

Develop working-hours policy for daily work hours, maximum average weekly hours, total hours over a three-month period, and managing commutes and work-related travel.

Managing Work Rosters

  • Design working hours and rosters to provide for adequate sleep opportunity (considering time for eating, washing, personal commitments etc.).
  • Make sure that there is enough time in a break for a minimum of six hours sleep
  • Set the number of consecutive days that can be worked.
  • Adopt a forward rotation roster systems for shift work (day-evening-night).
  • Avoid quick shift changeovers such as finishing at 11 am and starting again at 7 am.
  • Avoid starting or finishing shifts between 10 pm and 6 am.
  • As far as possible maintain predictable shift rosters and provide adequate notice of changes.
  • Allocate shift and night workers consecutive days off to allow for at least two full nights rest including some weekends.

Hours of Work

  • Ensure that workers have and take adequate and regular breaks so that they can rest, eat, and rehydrate.
  • Ensure adequate lunchroom and ablution facilities.
  • Control the length of shifts – increase resourcing, control overtime especially unscheduled overtime.
  • Put in place overtime restrictions when people already work 12 hour shifts.
  • Control the length of shifts to 14 hours, except for exceptional circumstances.
  • Control emergency call outs, shift swapping and overtime to ensure at least two consecutive nights sleep before and after commencing roster to allow for recovery.
  • Limit use of standby and on-call duties.
  • Ensure that responding to emergencies does not result in excessive hours.
  • Except for emergencies, give at least 24 hrs notice before changing someone from day shift.
  • Consider alternatives for personnel who have difficulties adjusting to working hours and shift patterns.

Commuting and Travel

  • Use journey planning to manage long commutes and travel requirements.
  • Provide alternative transport options at end of overtime and shift work to relieve commuting burden.

Work Demands

  • Schedule safety critical work outside low body clock periods (i.e. between 2 am and 6 am).
  • Structure shifts and work plans so that demands are highest towards the middle of the shift and decrease towards the end.
  • Adequate multiskilling across crews to allow for fatigue relief.
  • Provide adequate resources to cover breaks for operators of equipment that is in service continually.

Shift and Night Work;

  • Keep sequential night shifts to a minimum.
  • Avoid overtime allocations after afternoon or night shifts.
  • Include rest periods in the work schedule and allow time for controlled sleeping and napping if necessary.

Monitor Performance

  • Monitor actual time worked against the allocated roster to identify if excessive hours are being worked.

OFI-170 Review provision of resting rooms for fatigue management.

Managing fatigue in mining operations is a challenge for all continuous mining operations. Effective management of fatigues requires a whole of system approach that can include providing comfortable locations for taking fatigue breaks.

Workshop participants discussed Business Partner processes for taking fatigue breaks noting that there are limited options for short rests.

Review the benefits of providing dedicated resting rooms for fatigued mobile equipment operators.

Site fatigue management awareness and training is being completed to schedule.

Site hours worked tracking systems send reports and identify exceedances.

OFI-169: Review site processes for tracking and monitoring hours worked.

Workshop participants discussed site processes for fatigue management including how cumulative hours worked, including travel time, are monitored at Tarkwa Mine.

They noted that excessive hours at work without adequate breaks results in fatigued mobile equipment operators.

Consider a review of the effectiveness of the current hours of work tracking system. Confirm that it considers commutes and captures information on hours worked including:

  • Maximum shift length 
  • Maximum average weekly hours
  • Total hours over a three-month period
CFM-CPA.11.02 Impaired or inattentive operator operates mobile equipment CFM-CRA.04.30 Operators change behaviour after fatigue alerting system is fitted CFM-CTA.11.01 Supervisor does not identify or act when operator is fatigued or intoxicated CFM-SDA.83 Organisation Work Scheduling and Planning is inadequate CFM-SDA.86 Work Environment and Work Demands result in Fatigued Mobile Equipment Operators or other Health Affects
OFI-146: Review Operator Training for Installed Technology OFI-145: Review Operator Training for Equipment Features by Vehicle Type. BI-CPA.03.01 Trained, Competent and Authorised Mobile Equipment Operators

All workers who operate mobile equipment at the mine are trained and assessed for competency for operating defined equipment type, identifying and managing operating environment and vehicle interaction hazards.

All workers who operate mobile equipment at the mine (and other workers who routinely interact with vehicles e.g. maintainers) are trained and assessed for competency covering site and role relevant aspects including:

  • Understanding requirements for authorisation to operate equipment and to be in a work area (supervisor or mining official clearances)
  • Completion of pre-start inspections
  • Correct operating techniques (including communications required for starting and moving, identifying and maintaining no-go zones around mobile equipment etc.); appropriate brake and retarder use during equipment operation
  • Equipment load limits – weight and dimensions
  • Site requirements for loading and unloading covering: Load security and stability based on site conditions and requirements; Vehicle stability precautions to be taken when raising trays, tubs, or buckets and tipping loads e,g, identifying loads types that can hang up e.g. when transporting clays; Securing of loads;
  • Proper movement of people: wearing seatbelts; not transporting passengers in buckets, trays etc.; ensuring that passengers wear seatbelts or other restraints
  • Preparation before servicing and maintenance, including: Electrical isolation of equipment; cleaning of all mud or loose material; travelling to maintenance location or parking fundamentally stable
  • Identification and management of infrastructure hazards e.g. HV powerlines
  • Use of refuelling equipment and refuelling procedures
  • Park-up procedures to achieve fundamental stability
  • Identification and reporting of poor road conditions such as substandard delineation, windrows or bund heights, road surface, obstructions etc.
  • Tyre management including preventing and dealing with tyre heating and managing flat tyres
  • Identifying and responding to mechanical and electrical faults while driving
  • Constraints for operating around pedestrians
  • Precautions for use of remote controlled equipment
  • Responding to unintended equipment operations or movements
  • Site emergency requirements
  • Prevention of and response to tyre fires including activating the fire suppression system
  • Responding to events that impact on tyre and vehicle integrity (e.g. contact with debris, etc.)

Comptence Training and Awareness Procedure, V12, 4/6/24, HSMP 4.2 PR – S6.1 Determine training needs …identification of required skills, generation of a training log, minimum skills relate to understanding HSMS work standards

Mobile equipment operator training is delivered to schedule. Where applicable training is supported by use of equipment simulators – to safely confirm competency in emergency and unwanted situations such as mechanical or electrical faults, fire, emergency stop, over-speed, sticky loads, etc.)

OFI-146 Review Operator Training for Installed Technology

Workshop participants discussed mobile equipment operator training and questioned what is formally documented and how it is communicated.

They were unsure of how information about using installed technology for CAS and OAS is being communicated for new operators and during operator refresher training and authorisation.

Confirm that operator training in the use of technology includes pre-start checks, defect reporting, expected response to alarms, and are part of simulator refresher training.

OFI-145 Review Operator Training for Equipment Features by Vehicle Type.

The workshop participants identified situations where mobile equipment operators do not understand all the features of the equipment that they are using.

Lack of knowledge of equipment features and requirements can lead to unwanted operating practices and cause damage to equipment.

Review training modules to confirm that key operational aspects of equipment are well covered and easily understood by operators in training. Provide visual information about equipment features by type as a reference in work areas.

Training status reports.

Skills matrix reviews and updates.

Routine audits of the training management system are commissioned and reviewed by senior personnel.

Off Highway Dump Truck-Operator Practical Assessment – Confirms understanding of key skills and machine requirements by observing pre-use checks and machine operation.

CFM-CDA.06.02 Operator drives vehicle at the incorrect speed (too fast or too slow). CFM-CPA.10.02 Operators unaware of give way requirements for light vehicles CFM-CPA.10.04 Operators unaware of right of way requirements or operating constraints CFM-CPA.10.20 Operators of heavy and light vehicles (or pedestrians) fail to follow the designated travel path CFM-CPA.11.01 Equipment operator or pedestrian mistake in estimating clearance distance CFM-CPA.11.02 Impaired or inattentive operator operates mobile equipment CFM-CPA.11.03 Operators and/or passengers do not use fitted seatbelts or restraints CFM-CPA.11.05 Operator does not drive on available segregated roads CFM-CPA.11.10 Operators or co-workers have required communications equipment but are not contactable CFM-CPV.11.20 Operators or passenger has limb outside cabin while travelling CFM-CRA.03.01 Operator fails to identify and act on changes in conditions: reduced visibility, road narrowing, road surface etc. CFM-CRA.03.21 Incorrect action on vehicle system alarm – not understood CFM-CRA.11.22 Operator ignores or bypasses alarm or safety device CFM-EPA.32.06 Loose objects in cabin or around vehicle remain unsecured CFM-ERA.32.20 Operator fails to conduct effective pre-start that meets requirements CFM-ERV.33.23 Seat belt use indicators disabled or compromised CFM-MPA.63.01 Operator does not meet site requirements when parking CFM-SPA.83.01 Operator fails to comply with site requirements CFM-EPA.31.20 Equipment or component failure during operations e.g. brakes or steering or controlled functions CFM-CTA.10.90 Personnel do not alert others to presence of hazards
OFI-145: Review Operator Training for Equipment Features by Vehicle Type. BI-CPA.04.01 General features by vehicle type – information prepared for operators

General features and information organised by vehicle type, are documented and communicated to vehicle operators.

Training modules for vehicle operators includes relevant information and key safety features for the vehicles in use on the site. The information is provided in a format that is audience appropriate and available as a reference in the work area.

Training and assessment of vehicle operators about the general features of the vehicle they are operating.

Dump Truck Inspection Walk Around – Series of slides showing the truck and key locations and components.

OFI-145 Review Operator Training for Equipment Features by Vehicle Type.

The workshop participants identified situations where mobile equipment operators do not understand all the features of the equipment that they are using.

Lack of knowledge of equipment features and requirements can lead to unwanted operating practices and cause damage to equipment.

Review training modules to confirm that key operational aspects of equipment are well covered and easily understood by operators in training. Provide visual information about equipment features by type as a reference in work areas.

Confirmation that work area references are available. Initial and refresher training assessment outcomes. Records of topics covered at inductions, training, pre-shift meetings, etc.

CFM-LPV.54 Excessive water (Dust Control) is applied to road surface
OFI-117: Consider providing visual reference materials for mobile equipment operators. OFI-122: Update simulator modules to include sight lines. BI-CPA.04.02 Sight lines and blind spots by vehicle type – information prepared for vehicle operators

Mobile equipment sight lines and blind spot information, by vehicle type, is documented and communicated to vehicle operators.

Training modules include specific information on operator vision limits and sight lines for the vehicles in use. The information is provided in a format that is audience appropriate and available as a reference in the work area.

Training and assessment for people who operate mobile equipment covers sight lines and blind spots. Mobile equipment operators are aware of vehicle sight lines and blind spots by vehicle type and this information is regularly reinforced.

OFI-117 Consider providing visual reference materials for mobile equipment operators.

Mobile equipment operators are provided training by their employers, the Tarkwa Mine Business Partners. Each two years, based on the renewal cycle for their Ghanaian national drivers license, mobile equipment operators are reassessed and reauthorised to work on site by the Tarkwa Gold Fields training team. This reassessment includes use of simulators and is supported by detailed, visual training and support material covering equipment operations, mobile equipment information including expected responses to alerts and alarms.

Workshop participants were largely unaware of the training and support material and discussed options for making it available beyond the two year reauthorisation cycle. Their initial focus was on responses to alerts and alarms but they also recognised the usefulness of having information by vehicle type available covering sight lines and blind spots, prestart checks, emergency response e.g. fire suppression and emergency egress, and other general operating details.

Consider working with business partners and adapting training materials to develop visual reference material that can be in equipment cabins and workplaces e.g. laminated cards, information cycling on videos etc.

OFI-122 Update simulator modules to include sight lines

Vehicle operators get limited exposure to the real experience of restricted sight lines from heavy mobile equipment during their training. It is understood that there are options to update simulator training to highlight sight lines by equipment type supported by a 360 degree camera view.

Lack of understanding about sight lines for operators of mobile equipment and people that work around mobile equipment has resulted in significant incidents, including multiple fatalities.

Consider updating the simulator training to include the use of 360 degree cameras to increase the level of understanding of sight lines from operator positions in the cabin.

Confirmation that work area references are available.

Records of topics covered at inductions, training, pre-shift meetings, near miss reviews etc.

Interaction monitoring with by-exception reporting from vehicle cameras and collision avoidance technology.

CFM-CRA.03.20 Personnel do not manage heavy vehicle blind spots CFM-MPA.63.01 Operator does not meet site requirements when parking CFM-MPA.63.04 Parked vehicles block view for pedestrians and other equipment operators CFM-MPA.65.04 Light vehicle remains in heavy vehicle blind spot due to intersection approach speeds
OFI-146: Review Operator Training for Installed Technology OFI-117: Consider providing visual reference materials for mobile equipment operators. BI-CPA.04.04 Required emergency checks before operation – information for operator by vehicle type.

Required emergency checks before operation are documented and communicated to vehicle operators.

Vehicle operator emergency check training by vehicle type covers:

  • Cabin integrity
  • Cabin housekeeping (restraining/removing loose objects)
  • Use of seatbelts, restraints and interlocks 
  • Rescue and escape devices e.g. installation of oxygen generating self-rescuers in dozers that operate on stockpiles where there is a risk of falling into a void
  • Emergency escape
  • Auto shutdown
  • Reversing alarms
  • Other relevant information about protective systems 

The information is provided in a format that is audience appropriate and available as a reference in the work area.

Training and assessment of vehicle operators confirms that they understand the required emergency related prestart check requirements for the vehicle that they are operating.

Prestart inspection forms capture that emergency checks are completed.

OFI-146 Review Operator Training for Installed Technology

Workshop participants discussed mobile equipment operator training and questioned what is formally documented and how it is communicated.

They were unsure of how information about using installed technology for CAS and OAS is being communicated for new operators and during operator refresher training and authorisation.

Confirm that operator training in the use of technology includes pre-start checks, defect reporting, expected response to alarms, and are part of simulator refresher training.

OFI-117 Consider providing visual reference materials for mobile equipment operators.

Mobile equipment operators are provided training by their employers, the Tarkwa Mine Business Partners. Each two years, based on the renewal cycle for their Ghanaian national drivers license, mobile equipment operators are reassessed and reauthorised to work on site by the Tarkwa Gold Fields training team. This reassessment includes use of simulators and is supported by detailed, visual training and support material covering equipment operations, mobile equipment information including expected responses to alerts and alarms.

Workshop participants were largely unaware of the training and support material and discussed options for making it available beyond the two year reauthorisation cycle. Their initial focus was on responses to alerts and alarms but they also recognised the usefulness of having information by vehicle type available covering sight lines and blind spots, prestart checks, emergency response e.g. fire suppression and emergency egress, and other general operating details.

Consider working with business partners and adapting training materials to develop visual reference material that can be in equipment cabins and workplaces e.g. laminated cards, information cycling on videos etc.

Training system records confirm that vehicle operators are trained and competent in carrying out required prestart checks.

Supervisors and maintainers review the quality of prestart records.

Maintenance reports confirm that faults detected at prestart checks are being corrected.

CFM-CRA.11.22 Operator ignores or bypasses alarm or safety device CFM-EPA.32.06 Loose objects in cabin or around vehicle remain unsecured CFM-ERA.31.09 Installed equipment system status alarms do not operate CFM-ERA.32.20 Operator fails to conduct effective pre-start that meets requirements CFM-ERV.33.20 Compromised vehicle cabin no longer meets OEM or site specific specifications
OFI-175: Leverage operator equipment alarm training and awareness resources. OFI-132: Review site equipment specifications for key system alarms. OFI-113: Review response processes for equipment alert and alarm notification. OFI-117: Consider providing visual reference materials for mobile equipment operators. BI-CPA.04.05 Alarm and vehicle information panel expected response – information prepared for Operators

Expected responses to vehicle alarms and information displays are documented by vehicle type and communicated to vehicle operators.

Vehicle operator training modules include required responses to vehicle alarms and information panel indicators for each vehicle type in use.

Training is based on good operating practice and includes real world scenarios covering:

  • Understanding, acknowledging, and responding to OEM alarms and notifications
  • Understanding, acknowledging, and responding to installed technology alarms and notifications e.g. collision avoidance, fatigue monitoring, autonomous haulage etc.
  • Managing abnormal tyre situations
  • Reacting to overload alarms and conditions
  • Slowing and parking in an appropriate location
  • Notifying emergency services
  • Equipment shutdown
  • Activation of fire suppression system
  • Use of fire extinguishers, and
  • Exiting the machine including using an alternate means of egress

The information is provided in a format that is audience appropriate and available as a reference in the vehicle.

OFI-132 Review site equipment specifications for key system alarms.

Workshop participants discussed detection and warning systems capability on mobile equipment e.g. alerts and alarms for key systems such as brakes, steering and wheel assemblies e.g. tyre pressure.

There have been incidents at Tarkwa where failures in mobile equipment systems have caused vehicle interactions.

Consider reviewing site equipment specifications for alerting and alarming capability for key systems e.g. brakes, steering, wheel assembly conditions etc.

Before operating unsupervised, vehicle operators are assessed as being competent in responding to alarms and information panel indicators, for each type of vehicle that they operate. This includes details of the site process for seeking further maintenance advice.

Reference information is available and regularly reinforced.

OFI-175 Leverage operator equipment alarm training and awareness resources.

Tarkwa mine training has prepared comprehensive materials on expected responses mobile equipment alarms for operators in a highly visual style. This resource is used for operator training and to confirm competency during site authorisation approval.

However, some workshop participants were unfamiliar with this alarm training and awareness resource.

Review how these operator equipment alarm training and awareness resources can be applied through other communication channels beyond the two year authorisation cycle e.g. using posters, laminated cards in cabs, videos, etc. Consider sharing this benchmark high-quality work across the Gold Fields Group.

OFI-113 Review response processes for equipment alert and alarm notification.

Workshop participants confirmed that machine state alerts, alarms, and other information is transmitted back to dispatch. Advice, instructions, and directions are then relayed back via dispatch to vehicle operators.

This sequence can result in extensive delays and has resulted in equipment damage and ongoing operations with compromised systems.

Review the current process for prompting operators about machine state alarms and consider the cost and benefits of other approaches.

OFI-117 Consider providing visual reference materials for mobile equipment operators.

Mobile equipment operators are provided training by their employers, the Tarkwa Mine Business Partners. Each two years, based on the renewal cycle for their Ghanaian national drivers license, mobile equipment operators are reassessed and reauthorised to work on site by the Tarkwa Gold Fields training team. This reassessment includes use of simulators and is supported by detailed, visual training and support material covering equipment operations, mobile equipment information including expected responses to alerts and alarms.

Workshop participants were largely unaware of the training and support material and discussed options for making it available beyond the two year reauthorisation cycle. Their initial focus was on responses to alerts and alarms but they also recognised the usefulness of having information by vehicle type available covering sight lines and blind spots, prestart checks, emergency response e.g. fire suppression and emergency egress, and other general operating details.

Consider working with business partners and adapting training materials to develop visual reference material that can be in equipment cabins and workplaces e.g. laminated cards, information cycling on videos etc.

Confirmation that references are available in vehicles. Vehicle operator training and assessment records.

Vehicle operation monitoring with by-exception reporting alarm and indicator panel reporting.

By exception incident reviews.

CFM-CRA.03.21 Incorrect action on vehicle system alarm – not understood CFM-CRA.04.30 Operators change behaviour after fatigue alerting system is fitted CFM-CRA.10.30 Proximity alarms do not assist operator CFM-CRA.11.21 No action taken on over speed alarm CFM-CTA.11.34 Incorrect action taken on proximity alarm CFM-ERA.29.01 Multiple vehicles system alarms overwhelm and confuse the operator CFM-ERA.39.20 Overload warning system fails is incorrect or absent CFM-ETA.40.01 Routine false positive alarms CFM-MDV.71.01 Proximity alarms do not perform to specification (false negatives and false positives) CFM-SRA.92 Unit key system status and alarms are not monitored
OFI-135: Review speed limit communication and enforcement. BI-CPA.04.10 Site specific travelling speed information prepared for vehicle operators

Site travelling speeds by vehicle type are documented and communicated in a style that is appropriate for the audience.

Training modules for vehicle operators include specific information on travelling speeds by vehicle type for all relevant scenarios.

Training should be assessed to ensure that personnel understand vehicle speed expectations:

  • At crests
  • On curves and at intersections
  • In restricted or congested areas (where vision aids or spotters should be considered)
  • When towing
  • When loaded (and adjusting for different types of load)
  • When conditions change (slippery, rough, spillage, loss of sight lines, etc.)

The training information is provided in a format that is audience appropriate and available as a reference in the work area

GHG Tarkwa Traffic Management Plan, Mining Operations Procedure, TGM 1.10.54 WI as approved for use 01-03-07

6.1.5. Speed Limits

Maximum speed limit signs are located on all roads throughout the mine site. Every driver/ operator is responsible for ensuring that the posted speed limit is complied with. The maximum speed limit on all haulage roads in the mining area is 60km/h unless otherwise sign posted. The maximum speed limit in mine villages is 35km/hr unless sign posted otherwise. Drivers shall drive to condition at all times.

Equipment and vehicles shall be operated and driven safely at a speed which is consistent with the prevailing site conditions (road and weather condition). Site conditions can vary considerably over a relatively short period of time, either because of changing weather conditions, reducing visibility or by road conditions deteriorating; reducing traction or becoming more slippery or because of the volume of traffic which accelerates wear and tear on bends and other areas where braking takes place. Compliance to speed limits on-site and off-site shall be tracked via GPS units installed in Gold Fields Tarkwa Mine vehicles and on-site for Contractors.

Training and assessment of vehicle operator understanding of safe travel speeds by vehicle type for a range of scenarios and conditions.

Mobile equipment operators are aware of travel (and operating) speeds and this information is regularly reinforced.

Vehicle operator training and assessment records.

Confirmation that work area references are available.

Vehicle operation monitoring with by-exception speed reporting.

By exception incident reviews.

OFI-135 Review speed limit communication and enforcement.

Workshop participants discussed incidents cause by speeding at Tarkwa including vehicle roll overs and slides. They also consider situations where vehicles travelling too slowly have caused traffic issues on both access and haul roads.

Slow moving vehicles generate driver frustration and potential for higher risk driving manoeuvres. Speeding above limits increase the likelihood of vehicles losing control.

Review site processes for communicating, monitoring and reinforcing the requirements to travel at zoned speeds and adjust for conditions and circumstances.

CFM-CDA.06.02 Operator drives vehicle at the incorrect speed (too fast or too slow). CFM-LDV.42.02 Speed limits and over-speed management are inadequately considered in mine design and routine work planning CFM-SRV.96.20 No aggregated monitoring and response to over speed alarms
OFI-153: Review in pit parking planning and practices. BI-CPA.04.13 Minimum requirements for parking in any situation – information prepared for operators

Site requirements for parking in any situation are documented and communicated in a style that is appropriate for the audience.

Training modules for vehicle operators include site specific parking requirements for all scenarios covering:

  • Confirming that a parked vehicle is always fundamentally stable e.g. through the use of wheel chocks, ditches, trenches or wheels turned towards the wall
  • Entering and leaving defined parking locations
  • Parking to minimise interactions with other vehicles
  • Servicing, maintenance, and breakdown situations in operating areas
  • Parking in mobile equipment emergencies e.g. fires or potential fire situations

The information is provided in a format that is audience appropriate and available as a reference in the work area.

GHG Tarkwa Traffic Management Plan, Mining Operations Procedure, TGM 1.10.54 WI as approved for use 01-03-07 provides comprehensive details in site parking requirements in Section 6.3.7. Parking. This covers:

  • Parking in an inherently stable manner
  • Locations where parking is permitted
  • Locations where parking is not permitted
  • Leaving a vehicle 
  • Use of chocks
  • 15m distance from edge or toe of a high wall
  • Moving off after parking

Training and assessment confirms that vehicle operators understand:

  • How to park mobile equipment so that it is fundamentally stable
  • Minimum site requirements for parking for in all scenarios and conditions.

OFI-153 Review in pit parking planning and practices.

Workshop participants advised that restrictions in mine working areas leads to narrow access roads, confined work areas, frequent interactions between workgroups, poor siting of light vehicle parking areas, and sometimes an absence of parking.

Poorly parked mobile equipment creates vehicle interaction hazards e.g. when heavy mobile equipment departs from a parked position.

Confirm that parking area planning and design processes are adequate and monitor in pit parking practices.

Vehicle operator training and assessment records.

Confirmation that work area references are available.

Workplace inspections of parking practices.

Vehicle operation monitoring and reporting using proximity detection technology.

By exception incident reviews.

CFM-MPA.63.01 Operator does not meet site requirements when parking CFM-MPA.63.04 Parked vehicles block view for pedestrians and other equipment operators CFM-MPV.63.02 Light vehicles stop or park in heavy vehicle blind spots
OFI-129: CAS Project to include providing CAS data to augment current inspection processes. BI-CPA.04.14 Managing road works, including grader operations – information prepared for operators

Information on managing road works is documented and communicated in a style that is appropriate for the audience.

Training modules for vehicle operators include specific information on road maintenance hazards and controls covering:

  • Roles and responsibilities for briefing, communications, and instructions
  • Non-standard road conditions e.g. temporary narrowing
  • How to pass or overtake an operating grader
  • Communication requirements between road works crews and vehicle operators
  • Hazard notification, awareness, and management e.g. the use of signs
  • Scenarios based on incidents that illustrate what can go wrong

The information is provided in a format that is audience appropriate and available as a reference in the work area.

Vehicle operator training and assessment confirms managing road works across the full range of scenarios and conditions, including grader operations, is well understood and applied.

Road work briefings and with update communications take place before and across shifts.

Vehicle operator training and assessment records.

Confirmation that work area references are available.

Workplace observations during road maintenance.

Vehicle operation monitoring and reporting using proximity detection technology.

By exception incident reviews.

OFI-129 CAS Project to include providing CAS data to augment current inspection processes.

Workshop participants report that there are adequate Tarkwa mine procedures, processes, and operator training for managing interactions between road maintenance crews and operations.

While the application of processes to manage interactions can be observed and assessed, this observation performance measure is at best periodic.

Explore if CAS technology can be used to identify the subset of vehicle interactions between road maintenance vehicles and operations mobile equipment (and light vehicles). If it can, consider the value of developing performance measures for interactions with road maintenance equipment.

CFM-CRA.03.01 Operator fails to identify and act on changes in conditions: reduced visibility, road narrowing, road surface etc. CFM-LPV.54 Excessive water (Dust Control) is applied to road surface
OFI-155: Review processes for managing equipment breakdowns and field repairs. OFI-167: Review process that confirm mobile equipment is ready for use after maintenance. OFI-143: Review technician numbers on shift BI-CPA.05.01 Skilled and experienced personnel are accountable for maintaining mobile equipment

All workers who maintain mobile equipment are trained, competent and authorised for the tasks that they carry out.

Mobile equipment maintainers are trained and competent for the tasks that they undertake, including:

  • Preparation for works: Understanding and accessing work orders and checklists; preparing and receiving permits for activities such as hot work live work, or confined space entry; Isolation of energies
  • Monitoring, inspecting, checking and measuring for: Temperature of components; V-belts; pre- and post-maintenance; testing (normally) pressurised components; safety related devices (isolation points, brakes, steering, load carrying members, etc.)
  • Replacing, repairing, or adjusting: Hoses; restraints and brackets; specific equipment in safety or operational systems; fire suppression systems; fuel systems; brake and steering components; fitting of energy restraint components such as lagging, heat shields, sound insulation, guards, etc.
  • Mobile equipment maintainer competency training is delivered to schedule.
  • Maintainers complete work orders based on their skills and training and site supervision requirements.

OFI-167 Review process that confirm mobile equipment is ready for use after maintenance.

Workshop participants discussed challenges for recruiting and retaining experienced maintainers. Examples include experienced site drill fitters being offered international roles.

A lack of skilled and experienced maintenance staff has consequences including increases in equipment down time and the likelihood of defective equipment being returned to operations. Performance measures include equipment availability, early breakdowns, fires, and equipment failures that can cause vehicle interaction incidents.

Review and confirm that business partner processes to confirm that mobile equipment is ready for use after maintenance are adequate. Consider a review of recruitment and retention processes for equipment maintainers.

OFI-155 Review processes for managing equipment breakdowns and field repairs.

Workshop participants advise that broken down equipment in the operating environment is often not secured and protected. Also significant in-pit repairs are carried out at Tarkwa by the Business Partners.

Broken down equipment parked on, or being repair beside, hauls roads creates vehicle interaction hazards. There are a range of well established controls that include communication, demarcation, and longer term protection using earth bunds etc.

Review, update and train personnel in understanding how to apply site standards to manage broken down equipment. Confirm that supervisors monitor that controls are in place and make corrections when required.

  • Training, competency, and skills status reports.
  • Equipment reliability metrics, defect analysis and by exception incident reports.

OFI-143 Review technician numbers on shift

Workshop participants discussed frequent occasions when there are not enough technicians available on shift to perform repairs.

Delayed repairs can lead to compromised equipment being put back into service.

Review the manning levels for technicians on shift to confirm sufficient numbers are available.

CFM-EPA.31.20 Equipment or component failure during operations e.g. brakes or steering or controlled functions CFM-EPV.27.20 Mobile Equipment does not meet standards for safe access, lighting, signage and identification markings CFM-ERA.40.22 Over speed warning alarm fails to operate CFM-ERV.33.20 Compromised vehicle cabin no longer meets OEM or site specific specifications CFM-SRA.87.10 Equipment faults arising from poor standard of maintenance
OFI-159: Review site communication processes including work area induction refresher frequency. BI-CPV.08 Protocols for site induction and operating areas access

Induction processes for people using the road network are in place and applied at operating sites.

Induction training and underlying procedures and rules cover: 

  • Site access including access to nominated areas, such as working face areas, stockpiles, reclaim areas, workshops and other high traffic locations
  • Escorting requirements including vehicle communication protocols, permission to travel and general warning requirements
  • Incident reporting and emergency response 
  • Person Protective Clothing and Equipment (PPE) requirements 
  • Strict requirements to never modify safety equipment 
  • Handheld mobile phones and other personal electronic devices (PEDs) are never used when operating mobile equipment (and guidance on the presence of detection devices on these items) 
  • Handheld mobile phones are never used when working around mobile equipment 

All personnel at and visitors to operating sites undertake inductions and these are recorded. Inductions clearly communicate minimum site standards. 

OFI-159 Review site communication processes including work area induction refresher frequency.

Workshop participants discussed and confirmed that work area inductions and refreshers are carried out as needed i.e. not to a regular schedule.

This has led to situations where personnel who work in the mine are not fully informed about hazards present, required controls and key contacts. Examples include road network changes and personnel changes.

Review site communication processes, including refresher inductions, to confirm that information about hazards present and their controls is getting to personnel.

Regular inspections and personal hazard awareness records are made – with non-conformance corrected or escalated as appropriate. Periodic reviews of site access logs confirm all personnel have required inductions

CFM-MPA.72.01 Access control infrastructure is inadequate CFM-MPA.72.02 Operational access control (pedestrian and vehicle) is inadequate
OFI-102: Review and formalise escalating responses for operator alertness detected by OAS. BI-CRA.09.20 Introduce technology that supports existing fatigue management approaches

If new technology is introduced, it improves fatigue management by operationally integrating and enhancing existing processes.

Apply relevant site and company relevant for complex socio-technology projects.

OFI-102 Review and formalise escalating responses for operator alertness detected by OAS.

Tarkwa Mine has installed Operator Alert System (OAS) technology and has an onsite monitoring control room. The technology and supporting processes are mature and fully operationally integrated at site.

Workshop participants confirmed that OAS technology is a significant vehicle interaction control in continuous mining operation. However, their discussion and review of procedures that escalating responses based on lapses in operator alertness are not in the procedure and are not included in OAS operator training materials. There is a response protocol is detailed in poster format for OAS monitoring staff and is applied routinely.

The Tarkwa OAS and supporting practices set a Gold Fields benchmark. Consider reviewing and updating all supporting procedures and training modules so that they capture site practice for responding to differing levels of alertness detected in-field personnel.

Site and company reviews for technology that can support and enhance existing fatigue management approaches follows this sequence:

  • Carry out a baseline assessment of existing fatigue control effectiveness
  • Consider the benefits of technology to enhance or replace existing fatigue management controls
  • Establish functional and performance requirements and request that vendors confirm:
  • What the technology does
  • What the technology does not do
  • Work with knowledgeable and experienced personnel to anticipate potential changes in operator behaviour after technology is introduced
  • Confirm the processes that will prevent or mitigate these changes
  • Include these processes in the technology implementation plan
  • Prepare the business case for the technology investment;
  • Prepare an operational implementation plan that engages the workforce
  • Consider how the new technology can provide data and information that can be applied to improve site operations

Project management reviews.

Performance monitoring after technology implementation.

CFM-CPA.11.02 Impaired or inattentive operator operates mobile equipment CFM-ERA.33.40 In vehicle fatigue monitoring and alerting system fails CFM-SDA.83 Organisation Work Scheduling and Planning is inadequate CFM-SDA.86 Work Environment and Work Demands result in Fatigued Mobile Equipment Operators or other Health Affects
OFI-102: Review and formalise escalating responses for operator alertness detected by OAS. BI-CRA.09.21 Fatigue alert alarms

When fatigue monitoring systems are fitted, they have an operator alert function

Fatigue monitoring systems include a local alert function.

OFI-102 Review and formalise escalating responses for operator alertness detected by OAS.

Tarkwa Mine has installed Operator Alert System (OAS) technology and has an onsite monitoring control room. The technology and supporting processes are mature and fully operationally integrated at site.

Workshop participants confirmed that OAS technology is a significant vehicle interaction control in continuous mining operation. However, their discussion and review of procedures that escalating responses based on lapses in operator alertness are not in the procedure and are not included in OAS operator training materials. There is a response protocol is detailed in poster format for OAS monitoring staff and is applied routinely.

The Tarkwa OAS and supporting practices set a Gold Fields benchmark. Consider reviewing and updating all supporting procedures and training modules so that they capture site practice for responding to differing levels of alertness detected in-field personnel.

The alert function is confirmed as working by equipment operators as part of prestart checks, and there is a defined defect management process.

The site equipment maintenance strategy directs the servicing and maintenance of the installed technology.

Prestart equipment check records.

Site equipment maintenance records.

CFM-CPA.11.02 Impaired or inattentive operator operates mobile equipment CFM-ERA.33.40 In vehicle fatigue monitoring and alerting system fails CFM-SDA.83 Organisation Work Scheduling and Planning is inadequate CFM-SDA.86 Work Environment and Work Demands result in Fatigued Mobile Equipment Operators or other Health Affects
OFI-114: Improve implementation of consistent fleet ID across site systems. OFI-115: Improve quality of data networks on site. BI-CRA.09.22 Fatigue status data send

Installed fatigue monitoring technology is fully leveraged to assist equipment operators, supervisors, and site management improve operational performance.

When fatigue monitoring systems are fitted, they capture and send data for monitoring and analysis.

When fatigue monitoring systems are fitted, data is sent to:

  • Support and monitor operator performance, including making interventions;
  • Alert and update supervisors on operator performance
  • Analyse and improve operational processes

Data and associated information are managed following site privacy and record keeping standards.

OFI-114 Improve implementation of consistent fleet ID across site systems.

The Tarkwa VICE review confirmed that fleet identification for vehicle types is not always available and may be inconsistent.

Without adequate knowledge of vehicle types then unwanted proximity alarms may be generated.

Further define the issues and work with the technology provider to resolve how fleet IDs are loaded and tracked inside and across multiple systems. Establish agreed points of truth and checks.

OFI-115 Improve quality of data networks on site.

Workshop participants noted that there are frequent disconnects due to poor signal and network challenges around the Tarkwa operations.

With loss of signal the ability for dispatch to contact and advise operators of responses to alarm states is impaired.

Improve quality and reliability of site data networks to support timely and reliable alarm responses.

Records that confirm fatigue status data is used to improve fatigue management performance for:

  • Individuals
  • Supervisors
  • Operating sites

Confirmation that site records and privacy management standards are being maintained e.g. through audits or reviews.

CFM-CPA.11.02 Impaired or inattentive operator operates mobile equipment CFM-ERA.33.40 In vehicle fatigue monitoring and alerting system fails CFM-SDA.83 Organisation Work Scheduling and Planning is inadequate CFM-SDA.86 Work Environment and Work Demands result in Fatigued Mobile Equipment Operators or other Health Affects
OFI-166: Review RTW and rehabilitation processes BI-CTA.12.02 Medical support and rehabilitation of injured personnel Workers whose health has been degraded are supported to return to full (or alternate) duties.
  1. Medical providers and site based rehabilitation officers support the recovery of injured workers
  2. Alternate duties are identified as required to support an injured worker transition back into their original role
  3. Permanently impaired workers transition to alternate site based roles or leave the site to obtain off-site employment and care
  1. When an incident occurs where a worker is injured the site rehabilitation officer engages with medical services to support a return-to-work process and document the requirements as a return-to-work plan
  2. Injured workers follow their return-to-work plan whilst they are continuing to recover
  3. Fully healed workers return to full time duties
  4. Workers who can not return to their original roles are guided to alternate site, or off site, roles and treatment programs

OFI-166 Review RTW and rehabilitation processes

Consultant Comment: Poor control of return to work processes can lead to impaired operators working on equipment.

Workshop participants noted that medical support and rehabilitation processes present an opportunity for improvement on site. In particular the use of these processes when workers are returning from an injury (e.g. due to falls from equipment or impact from violent movements in cabins) can prevent recurrence of the injury.

Review return to work and worker rehabilitation processes.

  1. Medical and rehabilitation reports are prepared by the return-to-work coordinator for review by senior leaders
  2. As required the Human Resources Manager or other leaders intervene to support a worker transitioning to alternate roles, employment, or care
  3. Records of injury outcomes are provided to relevant stakeholders for tracking and reporting
CFM-CTA.11.01 Supervisor does not identify or act when operator is fatigued or intoxicated CFM-CPA.11.02 Impaired or inattentive operator operates mobile equipment
OFI-116: Review mobile equipment cabin ergonomic standards. BI-EDA.22.01 Specifications for operator displays

Appropriately consistent operator displays provide the information necessary for safe and productive outcomes.

  1. Site specifications for mobile equipment operator displays are confirmed with OEMs, and third-party suppliers and consider: Operator size range (anthropometrics); Operating conditions e.g. lighting levels, background noise; Communicating routine machine status information (gauges, warning lights, etc.); Key controls including those related to abnormal and emergency situations
  2. Display specifications required information about critical safety related systems, including: Speed; Pressure of pneumatic or hydraulic brake systems health; Brake circuit charging pressure; Parking brake applied; Steering Function health (hydraulic); Temperature of key components, and; Vision aids (cameras, proximity, etc.); Pressure in hydrostatic drives if service braking is hydrostatic; Temperature of oil-immersed brakes; Fire suppression system operating pressures;
  3. Other display specifications for additional information, such as:
    1. Electrical system health: battery charge; on-machine sensor status; warning lights (illuminating during start-up); System voltage
    2. Consumable status: Fuel level; Hydraulic reservoir level; Engine oil pressure; Hydraulic oil temperature; Cooling water temperature; Hydraulic transmission temperature; Transmission oil pressure; Engine oil temperature; Hydraulic oil pressure
    3. General operating information: Running time or distance travelled meter; Service hour meter; Slope indicator

Note: where there is more than one driving position, the display should be similar at each.

Key Source References:

  • Section 4.7 of ISO 19296 Mining – Mobile machines working underground – Machine Safety First edition 2018-11
  • Each display shall be marked by clear symbols in accordance with ISO 6405-1 and ISO 6405-2.

Mobile equipment is assessed and approved for use by a competent person following the Introduction to Site processes.

All vehicles in operating areas meet site requirements for consistent operator displays.

The details of equipment being used are listed in asset registers.

OEM provided asset documentation is added to Plant Safety File.

Maintenance planners review introduction to site records and add work orders for the maintenance of key systems.

OFI-116 Review mobile equipment cabin ergonomic standards.

Workshop participants noted that the installation of aftermarket equipment screens in vehicle cabins is creating ergonomic problems and in some cases restricted emergency egress.

Confusing displays and alarms lead to an increased cognitive load and increase potential for operator mistakes.

Review and update cabin ergonomic and installation standards for each type of equipment in use at Tarkwa.

Operator training and feedback on displays by equipment model and type.

Introduction to Site documentation and records.

OEM provided documentation covering display details are part of the Asset Plant Safety File and inform operator training.

Maintenance reviews and investigations e.g. failure to act on vehicle alarm.

HSMP 6.1 PR Performance Measurement and Monitoring Procedure – S6.13.5 Ergonomics – requirements for an Occupational Hygienist survey to be conducted.

CFM-CRA.03.21 Incorrect action on vehicle system alarm – not understood CFM-CRA.10.30 Proximity alarms do not assist operator CFM-CTA.11.34 Incorrect action taken on proximity alarm CFM-ERA.29.01 Multiple vehicles system alarms overwhelm and confuse the operator CFM-ERA.40.22 Over speed warning alarm fails to operate CFM-MDV.71.01 Proximity alarms do not perform to specification (false negatives and false positives)
OFI-116: Review mobile equipment cabin ergonomic standards. BI-EDA.29.01 Mobile equipment operator interfaces consider ergonomics and cognitive loading

Information provided by screens, control panels, alerts, alarms, and other installed devices assists mobile equipment operators to deliver safe and productive outcomes.

There is a site process that considers cab ergonomics when installing screens, control panels, alerts, alarms, and other devices that:

  • References site and company standards
  • References industry standards e.g. AS 2359.5 – Symbols for operator controls and other displays
  • Considers good practice industry research
  • Consults with experienced operators, maintainers, and technicians
  • Reviews and adjusts, as required, based on outcomes from installation pilots

The site process also reviews changes in cognitive load for mobile equipment operators covering:

  • The additional cognitive load of newly installed or activated interfaces
  • The cumulative load when combined with other screens, control panels, alerts, alarms, and devices
  • The range of operating environments and circumstances that are relevant for the device or interface
  • How the expected outcomes will be delivered e.g. improvements in situational awareness, operator decision making, and performance
  • Related potential failure modes and their controls

The site process is applied when selecting, trialling, and installing screens, control panels, alerts, alarms, and other devices.

OFI-116 Review mobile equipment cabin ergonomic standards.

Workshop participants noted that the installation of aftermarket equipment screens in vehicle cabins is creating ergonomic problems and in some cases restricted emergency egress.

Confusing displays and alarms lead to an increased cognitive load and increase potential for operator mistakes.

Review and update cabin ergonomic and installation standards for each type of equipment in use at Tarkwa.

Records of the site process being applied.

Logs and records that demonstrate the installed device and interface is being used as designed.

Operator feedback.

CFM-CRA.04.30 Operators change behaviour after fatigue alerting system is fitted CFM-CRA.10.30 Proximity alarms do not assist operator CFM-CTA.11.34 Incorrect action taken on proximity alarm CFM-ERA.29.01 Multiple vehicles system alarms overwhelm and confuse the operator CFM-ETA.40.01 Routine false positive alarms CFM-SRA.92 Unit key system status and alarms are not monitored
OFI-148: Review Technology Specifications for Equipment Introduction to Site OFI-140: Confirm that site vehicle identification standards are understood and applied. OFI-138: Investigate automated shutdown during extended equipment idle periods. OFI-132: Review site equipment specifications for key system alarms. BI-EPA.26 Fit-for-purpose equipment selection and Introduction to Site processes

Equipment selected for site use is fit-for-purpose and delivers safe and productive outcomes – meeting all site requirements for worker ergonomics, control integrity, matched technology (to site), equipment performance and operating environment constraints. 

Sites have an equipment selection process that involves maintainers and operational personnel in a team review (Risk Assessment format) and uses asset specifications when:  

  • Purchasing new or used equipment 
  • Transferring equipment to site 
  • Hiring equipment 
  • Assessing contractor equipment 

Equipment specifications ensure that mobile equipment assets meet site production and operating environment demands (including provision of systems for monitoring location (including geofencing), communicating and visibility/sight lines). The specifications also cover the use of ancillary equipment such as forklifts, scissor lifts, elevating work platforms etc. and considers suitability for the operating environment (stability, use of quick detach systems, character of the material being transported, temperature ranges, etc.) 

Equipment specifications include allowance for all safety related functions such as energy constraint (guarding), removal of energy (isolation), and protection against unwanted operation.

Information on equipment use limitations from the OEM should be provided to the operators/maintainers with training modules that also check for understanding. 

GHG Tarkwa Traffic Management Plan, Mining Operations Procedure, TGM 1.10.54 WI as approved for use 01-03-07

6.2.1. Vehicle Selection

All mobile equipment used on site shall be safe and suitable for use under the working conditions in which they were engaged. Prior to operating any mobile equipment on site, a competent person shall assess the equipment/ vehicle to ensure it meets the vehicle’s and driving standards. Specialists shall be employed to certify specialized equipment before use. Selection of vehicles shall take account of the activities they are intended to perform and the risks to operators and maintainers. All newly acquired equipment and vehicles shall be risk assessed for adequacy before being certified for use on site at Mine Maintenance. All mobile equipment shall comply with any relevant statutory requirements and shall be properly operated and maintained in accordance with the manufacturer’s operating recommendations. Designated mining equipment shall be equipped with fatigue detection equipment (Guardvant) and Collision Avoidance System must be functional during use. A vehicle shall not be operated on site unless it complies with the following minimum vehicle standards (refer to Vehicle Roadworthiness Guideline for more information):

OFI-148 Review Technology Specifications for Equipment Introduction to Site

Mobile equipment selected and introduced to site is an accountability of Tarkwa Business Partners with Gold Fields oversight. There is also a requirement to notify the regulator.

Gold Fields are supplying their Business Partners with additional technology that will be deployed in their vehicles. The technology includes Hexagon Mining Collision Avoidance Systems (CAS), operator alertness systems (OAS), and fleet management.

Confirm technology post installation specifications relevant to these systems and include installation standards.

OFI-138 Investigate automated shutdown options for extended equipment idle periods.

Tarkwa mine has an energy saving approach that includes limiting mobile equipment idle time.

Review feasibility of automated equipment shutdown during long idle periods. Discuss with contractors and include in equipment specifications.

OFI-132 Review site equipment specifications for key system alarms.

Workshop participants discussed detection and warning systems capability on mobile equipment e.g. alerts and alarms for key systems such as brakes, steering and wheel assemblies e.g. tyre pressure.

There have been incidents at Tarkwa where failures in mobile equipment systems have caused vehicle interactions.

Consider reviewing site equipment specifications for alerting and alarming capability for key systems e.g. brakes, steering, wheel assembly conditions etc.

Senior managers including representatives of operations and maintenance approve equipment selection recommendations.

A rigorous introduction to site process checks that received mobile equipment meets site requirements before it is permitted to operate. This includes ensuring that site requirements are met for:

  • Safety related systems including: Brakes; Steering; Control and warning and alarm systems that meet requirements (including technology solutions); Warning devices are in place to detect fatigue, use of mobile phones or personal electronic devices, and other site required systems; Radios or communication systems matching site requirements; Integrity of lifting and load moving components
  • Visibility and demarcation: Head lights; Running lights; Indicators; Vehicle identification numbers that are clear and visible 
  • General operability: Running gear e.g. tyres; Remote control technologies with associated fail safes to prevent unintended operation; Noise and fume generation matched to site requirements; Other components meeting site requirements for surfaces (cleanliness, coatings, external FRAS), strength, and confirming it is matched to site engineering and maintenance capabilities
  • Maintenance information and work orders are confirmed to be in place for the incoming items of equipment as required with information included in site information management systems (plant safety files).

OFI-140 Confirm that site vehicle identification standards are understood and applied.

Workshop participants confirmed that some vehicles in use do not have identification numbers in place. They also noted that this is a legal requirement in Ghana.

Vehicle identification is essential for communication.

Confirm site standards, review vehicle numbering and lights for conformance and correct as required.

Maintenance strategies confirm the status of all mobile equipment and associated infrastructure systems.

Safety related components/checks are addressed with additional rigour (e.g. proof test requirements) with status reports available to senior personnel.

Equipment specifications are regularly reviewed, and if required after significant incidents.

CFM-EDA.21.10 Equipment or Component Design is not error tolerant CFM-EDV.21.22 Steering and brake alarms not fitted CFM-EPA.25.20 Load shape, or restraints or load securing devices fail causing an incident CFM-ERA.31.09 Installed equipment system status alarms do not operate CFM-ERV.33.20 Compromised vehicle cabin no longer meets OEM or site specific specifications CFM-ETV.25.05 Fitted airbags fail to deploy CFM-ETV.33.01 OEM supplied seat belts are disabled or removed CFM-LPV.41.20 Loading requirements for vehicles inadequately considered in mine design, equipment selection and work planning CFM-SDA.86 Work Environment and Work Demands result in Fatigued Mobile Equipment Operators or other Health Affects CFM-SPA.88 Inadequate management of change
OFI-121: Review site standards for headlights OFI-144: Review effectiveness of maintenance backlog management processes. OFI-143: Review technician numbers on shift OFI-142: Review priorities set and planning for maintenance tasks. BI-EPA.31.01 Maintenance of safety and operational systems on mobile equipment

Safety and operational systems on mobile equipment are maintained to a schedule and repaired when they breakdown.

Mobile equipment with compromised safety and operational systems does not operate.

Maintenance strategies in place for all mobile and related plant based on OEM requirements for inspections, replacement and lubrication of components. Work on safety systems includes proof testing where appropriate e.g. after maintenance on brakes and steering systems, for exhaust gas levels, emergency stop functions, etc.

Faults detected at prestart checks and during operations are classified and prioritised for maintenance as a defect management process. Fault types where equipment should not be used and the process to follow in this situation are well defined. 

Maintenance planners issue work orders for mobile plant in line with confirmed strategies, containing checklists, instruction, procedures, and guidance for records to be prepared and submitted on completion of the work order.

Maintenance workers conduct work order tasks in line with site requirements (which may extend beyond OEM procedures).

Completed work order records are returned to the maintenance planners for permanent storage.

Senior engineering and operational personnel review records to confirm maintenance strategy meets site requirements.

OFI-144 Review effectiveness of maintenance backlog management processes.

Workshop participants indicated that there are problems with the maintenance backlog system and incomplete mobile equipment tasks are not being rescheduled as required.

The backlog system used by maintenance planners is currently not working effectively.

Confirm if the issue is relevant for both Business partners and the review maintenance systems to confirm backlog issues are being managed and tracked through to resolution.

OFI-142 Review priorities set and planning for maintenance tasks.

Workshop participants reported that maintenance windows for equipment are frequently shortened due to production demands or lack of required components.

Incomplete maintenance works can lead to failures of key systems and unplanned breakdowns.

Review the use of component kits which confirm all required components and consumables are held before commencing a service. Also, review the priorities for maintenance tasks and consider how to effectively quarantine the maintenance windows from short term production requirement pressures.

OFI-121 Review and update site standards for headlights.

Workshop participants advise that the new replacement LED bulbs create more shadows than the traditional bulbs

Roads obscured by shadows can lead to an inability to detect rough road conditions.

Conduct a lighting survey for the different available headlight bulb types and adopt the best as a site standard. This should confirm that all new-to-site and refurbished equipment meets the requirement to provide sufficient light intensity and contrast.

Equipment availability metrics.

Reports on maintenance work order close out are prepared by maintenance planners for review by senior personnel

Metrics on the status of safety related work orders.

Reviews and investigations after significant maintenance failures.

OFI-143 Review technician numbers on shift

Workshop participants discussed frequent occasions when there are not enough technicians available on shift to perform repairs.

Delayed repairs can lead to compromised equipment being put back into service.

Review the manning levels for technicians on shift to confirm sufficient numbers are available.

CFM-EDA.21.10 Equipment or Component Design is not error tolerant CFM-EPA.31.20 Equipment or component failure during operations e.g. brakes or steering or controlled functions CFM-EPA.33.40 Communication equipment absence, failure or poor reception CFM-EPV.27.20 Mobile Equipment does not meet standards for safe access, lighting, signage and identification markings CFM-ERA.31.09 Installed equipment system status alarms do not operate CFM-ERA.33.40 In vehicle fatigue monitoring and alerting system fails CFM-ERA.39.20 Overload warning system fails is incorrect or absent CFM-ETV.33.01 OEM supplied seat belts are disabled or removed CFM-SRA.87.10 Equipment faults arising from poor standard of maintenance
OFI-114: Improve implementation of consistent fleet ID across site systems. OFI-115: Improve quality of data networks on site. BI-EPV.40 Mobile Equipment data send

When sensors that monitor equipment components and systems have been fitted, the data is utilised to improve and sustain performance.

When sensors and monitoring systems for equipment components and systems have been fitted, the data is utilised to improve and sustain performance.

Site infrastructure requirements for data transfer are specified.

Onboard and off-board data capture, transfer, and storage are specified e.g. tyre pressure and temperature, acceleration, braking, engine revs, speed, strut pressure, alarm status etc.

Specifications for how equipment data is aggregated, sorted, monitored for drift, reported, and analysed are in place.

On-board systems monitor equipment usage, data is transferred via site infrastructure.

The data is aggregated and sorted so that it can be used for performance monitoring, reporting, and analysis.

OFI-114 Improve implementation of consistent fleet ID across site systems.

The Tarkwa VICE review confirmed that fleet identification for vehicle types is not always available and may be inconsistent.

Without adequate knowledge of vehicle types then unwanted proximity alarms may be generated.

Further define the issues and work with the technology provider to resolve how fleet IDs are loaded and tracked inside and across multiple systems. Establish agreed points of truth and checks.

OFI-115 Improve quality of data networks on site.

Workshop participants noted that there are frequent disconnects due to poor signal and network challenges around the Tarkwa operations.

With loss of signal the ability for dispatch to contact and advise operators of responses to alarm states is impaired.

Improve quality and reliability of site data networks to support timely and reliable alarm responses.

Accurate, timely, and tailored reports on equipment usage and performance are provided to operators, supervisors, mine planners, maintenance personnel, training, and management.

Reports are reviewed and performance drifts are identified and corrected.

CFM-EDV.21.22 Steering and brake alarms not fitted CFM-ERA.31.09 Installed equipment system status alarms do not operate CFM-SRA.92 Unit key system status and alarms are not monitored
OFI-131: Update equipment defect management processes to include alarms. OFI-113: Review response processes for equipment alert and alarm notification. OFI-118: Review frequency of mobile equipment alarm system checks. BI-EPV.40.01 Local and remote failsafe for sensors, alarms, and installed safety devices.

Sensor and alarm faults for equipment components, systems, and installed safety devices are detected with local notification, data capture and fault information send.

There are specifications for fault reporting from sensors, alarms, and safety devices installed on mobile equipment.

The specifications include requirements for local notification, data capture and fault information send.

The specifications confirm fault priority and category and required action.

When monitoring systems for equipment components alarm or safety devices are compromised, this data is captured and is sent for analysis and review.

OFI-131 Update equipment defect management processes to include alarms.

Workshop participants discussed the benefits of extending defect reporting and Business Partner maintenance management systems to include installed technology alerts and alarms. This includes developing protocols to operate when alarms and alerts are defective.

Undetected non-functional alarms on operating mobile equipment present significant hazards for operators who assume the alert and alarm are operating.

Review the defect management system and associated training to address how to react to defective monitoring and alarm systems. Review failsafe and detection notification with technology providers and confirm that it meets site requirements.

When monitoring systems for equipment components alarm or safety devices are compromised there is local notification and relevant fault data is captured, transmitted off vehicle.

The data is transmitted, aggregated and sorted so that it is available to:

  • Provide instructions back to the operator
  • Monitor performance
  • Prepare reports
  • Undertake diagnostics and analysis

OFI-113 Review response processes for equipment alert and alarm notification.

Workshop participants confirmed that machine state alerts, alarms, and other information is transmitted back to dispatch. Advice, instructions, and directions are then relayed back via dispatch to vehicle operators.

This sequence can result in extensive delays and has resulted in equipment damage and ongoing operations with compromised systems.

Review the current process for prompting operators about machine state alarms and consider the cost and benefits of other approaches.

Accurate, timely, and tailored reports on fault reporting from sensors, alarms, and safety devices installed on mobile equipment are provided to supervisors, maintenance personnel, training, management, suppliers, contract service providers and others as required.

OFI-118 Review frequency of mobile equipment alarm system checks

Workshop participants discussed the frequency and adequacy of maintenance checks and testing of vehicle alarm and alert systems. They raised questions about consistency, quality, and scheduling of checks.

Concerns were raised on alarm systems that do not fail-to-safe. They also recognised that defective or non-functioning alert and alarm systems during vehicle operations can result in significant incidents and equipment damage.

Review site processes for checking and tests of mobile equipment alarms. Consider both OEM installed third-party technology alarms.

CFM-CRA.03.21 Incorrect action on vehicle system alarm – not understood CFM-CRA.11.22 Operator ignores or bypasses alarm or safety device CFM-EDV.21.22 Steering and brake alarms not fitted CFM-ERA.31.09 Installed equipment system status alarms do not operate CFM-SRA.92 Unit key system status and alarms are not monitored
OFI-144: Review effectiveness of maintenance backlog management processes. OFI-123: Consider in-field maintenance checks prior to planned services BI-ERA.31.02 Inspection and maintenance of mobile equipment cabin integrity, restraints, access and escape, auto shutdowns and other relevant protective systems.

The protective systems and safety related components of on-site approved mobile equipment remain functional.

Maintenance strategies related to cabins, passenger restraints, access and egress, auto shutdown and other relevant protective systems are in place for all vehicles on site and include:

  • Regular visual checks and inspections
  • Measurements (with tolerances)
  • Proof testing

Replacement of components based on OEM schedule, recommendations, and site duty requirements.

Work orders for equipment on site are completed in a timely manner covering:

  • Cabin integrity,
  • Restraints (including load carrying restraints),
  • Access and emergency egress
  • Auto shutdown and other relevant protective systems

Maintenance planners close out work orders when confirmed as completed and prepare regular status reports on work order status for equipment on site.

OFI-144 Review effectiveness of maintenance backlog management processes.

Workshop participants indicated that there are problems with the maintenance backlog system and incomplete mobile equipment tasks are not being rescheduled as required.

The backlog system used by maintenance planners is currently not working effectively.

Confirm if the issue is relevant for both Business partners and the review maintenance systems to confirm backlog issues are being managed and tracked through to resolution.

OFI-123 Consider in-field maintenance inspections prior to planned services.

The workshop participants discussed how mobile equipment maintenance inspections are carried in the pit before scheduled maintenance by Tarkwa Mine Business Partners. They confirmed that the practice is not routine.

This sometimes results in defects not being repaired because all the maintenance requirements for a vehicle arriving for a service have not been identified.

Consider the cost benefits of implementing a process for in-field maintenance inspections to assist with maintenance planning.

Equipment availability metrics.

Reports on maintenance work order close out are prepared by maintenance planners for review by senior personnel

Metrics on the status of safety related work orders.

Reviews and investigations after significant maintenance failures.

CFM-ERV.33.20 Compromised vehicle cabin no longer meets OEM or site specific specifications CFM-ETV.25.05 Fitted airbags fail to deploy CFM-SRA.87.10 Equipment faults arising from poor standard of maintenance
OFI-140: Confirm that site vehicle identification standards are understood and applied. OFI-144: Review effectiveness of maintenance backlog management processes. OFI-121: Review site standards for headlights OFI-123: Consider in-field maintenance checks prior to planned services BI-ERA.31.03 Inspection and maintenance of mobile equipment lights and markings

Mobile equipment in use always meets category standards for lights and markings.

Each category of mobile equipment has an approved standard for lights and markings.

There are comprehensive site processes in place to apply and maintain this mobile equipment standard including:

  • Selection
  • Site use approval
  • Inspection
  • Cleaning and washing
  • Defect reporting
  • Equipment stand down
  • Repairs
  • Planned maintenance including the replacement of components based on OEM schedule, recommendations, and site duty requirements.

GHG Tarkwa Traffic Management Plan, Mining Operations Procedure, TGM 1.10.54 WI as approved for use 01-03-07 provides details of site requirements for light types and use in section 6.2.1.1. Lights

Inspection, defect reporting, repair and maintenance processes that consider lights and marking for mobile equipment are consistently applied.

Prestart checks include:

  • Confirming functioning lights and indicators
  • Visible decals
  • Whip flags (e.g. for surface mining light vehicles)
  • Flashing lights (colour as specified)

OFI-144 Review effectiveness of maintenance backlog management processes.

Workshop participants indicated that there are problems with the maintenance backlog system and incomplete mobile equipment tasks are not being rescheduled as required.

The backlog system used by maintenance planners is currently not working effectively.

Confirm if the issue is relevant for both Business partners and the review maintenance systems to confirm backlog issues are being managed and tracked through to resolution.

OFI-140 Confirm that site vehicle identification standards are understood and applied.

Workshop participants confirmed that some vehicles in use do not have identification numbers in place. They also noted that this is a legal requirement in Ghana.

Vehicle identification is essential for communication.

Confirm site standards, review vehicle numbering and lights for conformance and correct as required.

OFI-121 Review and update site standards for headlights.

Workshop participants advise that the new replacement LED bulbs create more shadows than the traditional bulbs

Roads obscured by shadows can lead to an inability to detect rough road conditions.

Conduct a lighting survey for the different available headlight bulb types and adopt the best as a site standard. This should confirm that all new-to-site and refurbished equipment meets the requirement to provide sufficient light intensity and contrast.

OFI-123 Consider in-field maintenance inspections prior to planned services.

The workshop participants discussed how mobile equipment maintenance inspections are carried in the pit before scheduled maintenance by Tarkwa Mine Business Partners. They confirmed that the practice is not routine.

This sometimes results in defects not being repaired because all the maintenance requirements for a vehicle arriving for a service have not been identified.

Consider the cost benefits of implementing a process for in-field maintenance inspections to assist with maintenance planning.

  1. The current and approved standard for each category of mobile equipment details requirements for lights and markings.
  2. Monitoring that prestart checks are being undertaken to required standard.
  3. Equipment availability metrics include defect stand down information.
  4. Reports on maintenance work order close out are prepared by maintenance planners for review by senior personnel.
CFM-EPV.27.20 Mobile Equipment does not meet standards for safe access, lighting, signage and identification markings
OFI-144: Review effectiveness of maintenance backlog management processes. OFI-118: Review frequency of mobile equipment alarm system checks. OFI-123: Consider in-field maintenance checks prior to planned services BI-ERA.31.04 Inspection and Maintenance of Mobile Equipment alarms, monitors, cameras, and other warning devices.

Mobile equipment alarms, cameras and advice screens are functional during operations.

Each category of mobile equipment has an approved standard for alarms, cameras, advice screens, and other warning devices.

There are comprehensive site processes in place to apply and maintain this mobile equipment standard including:

  • Selection
  • Site use approval
  • Inspection and calibration
  • Proof testing
  • Cleaning and washing
  • Defect reporting
  • Equipment stand down requirements
  • Repairs and replacement
  • Planned maintenance including proof testing, component replacement based on OEM schedule, recommendations, and site duty requirements.

Inspection, calibration, proof testing, defect reporting, repair, maintenance and other processes relevant to mobile equipment alarms, cameras, and in cabin monitors, and other warning devices are consistently applied.

Prestart checks and infield calibration includes checking and reporting on the status of operator relevant alarms, cameras, advice screens, and other warning devices.

OFI-144 Review effectiveness of maintenance backlog management processes.

Workshop participants indicated that there are problems with the maintenance backlog system and incomplete mobile equipment tasks are not being rescheduled as required.

The backlog system used by maintenance planners is currently not working effectively.

Confirm if the issue is relevant for both Business partners and the review maintenance systems to confirm backlog issues are being managed and tracked through to resolution.

OFI-123 Consider in-field maintenance inspections prior to planned services.

The workshop participants discussed how mobile equipment maintenance inspections are carried in the pit before scheduled maintenance by Tarkwa Mine Business Partners. They confirmed that the practice is not routine.

This sometimes results in defects not being repaired because all the maintenance requirements for a vehicle arriving for a service have not been identified.

Consider the cost benefits of implementing a process for in-field maintenance inspections to assist with maintenance planning.

  1. The current and approved standard for each category of mobile equipment details requirements for alarms, cameras, advice screens, and other warning devices.
  2. Monitoring that prestart checks are being undertaken to required standard.
  3. Equipment availability metrics include defect stand down information.
  4. Reports on maintenance work order close out are prepared by maintenance planner

OFI-118 Review frequency of mobile equipment alarm system checks

Workshop participants discussed the frequency and adequacy of maintenance checks and testing of vehicle alarm and alert systems. They raised questions about consistency, quality, and scheduling of checks.

Concerns were raised on alarm systems that do not fail-to-safe. They also recognised that defective or non-functioning alert and alarm systems during vehicle operations can result in significant incidents and equipment damage.

Review site processes for checking and tests of mobile equipment alarms. Consider both OEM installed third-party technology alarms.

CFM-CRA.10.30 Proximity alarms do not assist operator CFM-ERV.33.23 Seat belt use indicators disabled or compromised CFM-ETA.40.01 Routine false positive alarms CFM-SRA.92 Unit key system status and alarms are not monitored
OFI-144: Review effectiveness of maintenance backlog management processes. BI-ERA.31.05 Inspection, calibration, maintenance, and updating of mobile equipment tools and speed measuring systems

Mobile equipment maintenance tools, speedometers and other indicators are accurate.

Key maintenance tools and measuring components on equipment are regularly calibrated, including:

  1. Speed measurement devices include speedometers
  2. Operator information panels
  3. OEM and third-party monitoring technology
  4. Torsion wrenches and pressure monitoring devices

Inspection, calibration and maintenance is scheduled in line with OEM or third-party provided nominated maintenance strategies.

Work orders are raised and issued to achieve inspection and calibration of maintenance tools and speed measurement devices follows OEM or third-party provider schedule, recommendations.

OFI-144 Review effectiveness of maintenance backlog management processes.

Workshop participants indicated that there are problems with the maintenance backlog system and incomplete mobile equipment tasks are not being rescheduled as required.

The backlog system used by maintenance planners is currently not working effectively.

Confirm if the issue is relevant for both Business partners and the review maintenance systems to confirm backlog issues are being managed and tracked through to resolution.

  1. Current inspection, calibration, maintenance, and software version records for each mobile equipment unit.
  2. Maintenance status reports.
CFM-ERA.39.21 Speedometer does not indicate actual speed CFM-ERA.40.22 Over speed warning alarm fails to operate CFM-SRV.96.20 No aggregated monitoring and response to over speed alarms
OFI-144: Review effectiveness of maintenance backlog management processes. OFI-123: Consider in-field maintenance checks prior to planned services BI-ERA.31.08 Inspection and maintenance of mobile equipment key systems, brakes, steering, and wheel assemblies

Key mobile equipment systems and components such as brakes, electric drive propulsion elements, steering, and wheel assemblies do not fail without detection or warning.

Each category of mobile equipment has an approved standard for key systems and components.

There are comprehensive site processes in place to apply and maintain this mobile equipment standard including:

  • Selection
  • Site use approval
  • Inspection and calibration
  • Prestart checks
  • Reporting operator performance
  • Defect reporting
  • Equipment stand down requirements
  • Repairs and replacement
  • Planned maintenance and component replacement based on OEM schedule, recommendations, and site duty requirements.

Defect reports, alarms, and non-conforming actions of operators and maintainers are analysed to consider additional inspections and maintenance, further operator training, and performance monitoring.

GHG Tarkwa Traffic Management Plan, Mining Operations Procedure, TGM 1.10.54 WI as approved for use 01-03-07 provides details of site requirements for brakes in Section 6.2.1.2. Brakes. This includes a requirement for light vehicles accessing the mining operational area to undergo mandatory brake testing.

Inspection, calibration, defect reporting, repair, maintenance, and other processes relevant to mobile equipment key systems are consistently applied.

Mobile equipment prestart checks and in field testing check and report on the status of key systems.

A defect reporting system is in place with clear guidance on the actions to be taken if mobile equipment key systems are compromised.

OFI-144 Review effectiveness of maintenance backlog management processes.

Workshop participants indicated that there are problems with the maintenance backlog system and incomplete mobile equipment tasks are not being rescheduled as required.

The backlog system used by maintenance planners is currently not working effectively.

Confirm if the issue is relevant for both Business partners and the review maintenance systems to confirm backlog issues are being managed and tracked through to resolution.

OFI-123 Consider in-field maintenance inspections prior to planned services.

The workshop participants discussed how mobile equipment maintenance inspections are carried in the pit before scheduled maintenance by Tarkwa Mine Business Partners. They confirmed that the practice is not routine.

This sometimes results in defects not being repaired because all the maintenance requirements for a vehicle arriving for a service have not been identified.

Consider the cost benefits of implementing a process for in-field maintenance inspections to assist with maintenance planning.

  1. The current and approved standard for each category of mobile equipment details key system and component operational requirements.
  2. Monitoring that prestart checks are being undertaken to the required standard and frequency.
  3. Equipment availability metrics include defect stand down information.
  4. Reports on maintenance work orders close out for key systems.
  5. Incident analysis of component or key system failures that occurred without warning or detection.
CFM-EPA.31.20 Equipment or component failure during operations e.g. brakes or steering or controlled functions CFM-EPV.39.42 Vehicles are operated outside specified tyre conditions
OFI-151: Review site processes and confirm that they are adequate to support required radio communications. OFI-110: Review Tarkwa Communications Infrastructure and Radio Use. OFI-115: Improve quality of data networks on site. BI-ERA.31.30 Selection, inspection, and maintenance of radios and other communication equipment

Operating sites deploy fit for purpose, effective, and reliable radios and other communication equipment.

There is a site performance standard for site radios and other communication equipment

There are comprehensive site processes that define:

  • Required communication equipment by equipment category
  • Required communication equipment for personnel who work around mobile equipment e.g. handheld devices
  • Assigned radio channels
  • Acceptable practices when communication equipment is faulty, out of range, or unavailable
  • Expected maintenance performance metrics

Prestart checks, defect reporting, radio channel allocation, signal coverage, repair, maintenance, and other processes relevant to communications equipment are consistently applied.

OFI-151 Review site processes and confirm that they are adequate to support required radio communications.

Workshop participants discussed site processes and schedules for the routine checking of radios in mobile equipment. This includes prestart checks, defect reporting, and scheduled maintenance of radios and site infrastructure. It also incudes confirming minimum requirements for radios in heavy mobile equipment, service vehicles, light vehicles and for pedestrians.

Surface mining operations typically deliver safe and productive outcomes using radios to support disciplined positive communications to manage interactions in working areas. Workshop participants report that radio faults do occur and that pre start and routine schedules for checking radios and communication infrastructure are inconsistent.

Review site processes and confirm that they are adequate to support required radio communications. Involve Business Partners in the review.

OFI-110 Review Tarkwa Communications Infrastructure and Radio Use.

Workshop participants report that there are ongoing site issues with communication equipment, including competition for radio use, incorrect use of radios, and network blind spots in the mine.

Effective radio and data communications are essential for safe and productive mine operations and cover positive communications and dispatch.

Review radio use discipline, radio availability e.g. radios in light vehicles accessing the pit, network coverage etc. Establish site minimum standards.

OFI-115 Improve quality of data networks on site.

Workshop participants noted that there are frequent disconnects due to poor signal and network challenges around the Tarkwa operations.

With loss of signal the ability for dispatch to contact and advise operators of responses to alarm states is impaired.

Improve quality and reliability of site data networks to support timely and reliable alarm responses.

Maintenance planners close out work orders when completed and prepare regular status and performance reports for communications equipment.

Work orders for equipment repair are completed in a timely manner.

CFM-EPA.33.40 Communication equipment absence, failure or poor reception CFM-MPA.66.01 Incorrect communication protocol
OFI-119: Confirm and apply calibration requirements for VIMS speed monitoring. BI-ERA.31.50 Protocols for the calibration of measuring equipment

Measuring and position monitoring equipment is inspected and calibrated.

There is a site standard for the regular inspection, calibration, and upgrade management of measuring equipment.

It is supported by site processes that detail:

  • Skills, qualifications, and experience required by personnel undertaking at site inspections and equipment calibration
  • Offsite provider support
  • Inspection, calibration, and software upgrade management for deployed technologies e.g. position systems

Site personnel are trained, competent, and authorised to use measuring equipment for:

  • Equipment maintenance e.g. pressure, braking, and other measures
  • Measurement of as built conditions in the operating environment

The training includes inspecting, testing, and confirming that measuring and position equipment is calibrated before use.

OFI-119 Confirm and apply calibration requirements for VIMS speed monitoring

Workshop participants discussed how vehicle speed at Tarkwa Mine is measured using VIMS.

They noted recent concerns about the system calibration and accuracy so that there is confidence that reliable information is being captured and reported.

Confirm and apply the minimum requirements for calibration of vehicle measuring systems.

Reports on the calibration status of measuring equipment.

Records confirm the competence of personnel undertaking measuring or surveying tasks.

CFM-CDA.06.02 Operator drives vehicle at the incorrect speed (too fast or too slow). CFM-EPA.31.20 Equipment or component failure during operations e.g. brakes or steering or controlled functions CFM-EPV.39.42 Vehicles are operated outside specified tyre conditions CFM-ERA.39.20 Overload warning system fails is incorrect or absent CFM-ERV.33.20 Compromised vehicle cabin no longer meets OEM or site specific specifications
OFI-134: Consider mandating fitted radios for all mine vehicles. OFI-133: Review site pre-start processes BI-ERA.32.01 Operator pre-start checks include safety and operational components

Equipment operators carry our prestart checks to confirm equipment can be operated and work area hazards are identified and managed. Equipment that is compromised does not operate.

Equipment operators are competent and supported to carry equipment and work area prestart checks.

Mobile equipment prestart checks include:

  • Brakes including warning systems
  • Steering including warning systems 
  • Tyres and other running gear
  • Conditions of vehicle – load carrying elements, guards and covers, lights and signage, hydraulic lines, and ground engaging tools
  • Access and egress (normal and emergency) in good condition and accessible
  • Communications (radios etc.)
  • Fire extinguishers and fire suppression system status,
  • Any attachments, e.g. buckets, jacks, lifting equipment, spare wheels etc.

Faults detected at prestart checks and during operations are classified:

  • When equipment cannot continue to operate and how to manage repair or removal from work area
  • When equipment can continue to be operated (and communication of tolerable faults)

Work area checks include identifying and managing hazards from: Vehicle moving off; Obstacles; Road conditions; Weather (rain, wind (dust), other threats), and; Vision and sight line restrictions

GHG Tarkwa Traffic Management Plan, Mining Operations Procedure, TGM 1.10.54 WI as approved for use 01-03-07

6.2. Mobile Equipment

If any part of an item of mobile equipment or light vehicle is not fully operational, the machinery or vehicle is to be tagged out of service and the maintenance department informed. The equipment is not to be used until repairs are completed.

6.2.1.8. Radio Use

All mine vehicles shall be fitted with radio and shall change to the Mining Operations channel when travelling in and around mining area. Any vehicle that does not have access to a radio capable of receiving channels must be escorted whilst on the haul roads and the Pit areas. Areas such as the Process Plant and construction sites where communication is required must be done through the 2-way radio system.

OFI-134 Consider mandating fitted radios for all mine vehicles.

Workshop participants discussed situations where vehicles are routinely entering the mine without functioning radios. Many personnel operating light vehicles in the pit use hand held radios.

Inability to contact other vehicles, or be contacted, can lead to misunderstandings and cause vehicle collisions.

Confirm the site equipment specifications requirements for fitted and functioning radios. Communicate site requirements and consider having radio checks when buggy whips are fitted to light vehicles. Reduce the reliance on portable radios e.g. to pedestrians and escorts. Consider mandating fitted radios on all mine vehicles.

Equipment operators are trained, competent and authorised to carry equipment and work area prestart checks before operating equipment.

Prestart checklists are prepared for each type of equipment.

Prestart equipment and work area checks are logged.

There is a site defect reporting and management system.

Consultant CommentMultiple incidents in the provided data set relate to wheels falling off during operations. the use of wheel nut indicators can reduce the potential for pre-use inspections to fail to detect loose or failing studs.

OFI-133 Review site pre-start processes.

Workshop participants advised that pre-start books are not always available. When they are not available they are not used and vehicles go into operation without a proper check.

Failure to conduct appropriate pre-starts can lead to vehicle or key component failures during operations.

Review site pre-start systems considering a potential to use a digital option with maintenance system connects rather than relying on printed paper books.

Supervisors monitor the quality of operator prestart checks.

Maintenance planners review prestart forms and raise work orders as required.

Prestart records confirm that checks of work areas and key systems, including – communications, brakes, steering, tyres and running gear are completed.

CFM-EPA.31.20 Equipment or component failure during operations e.g. brakes or steering or controlled functions CFM-EPV.39.42 Vehicles are operated outside specified tyre conditions CFM-ETV.33.01 OEM supplied seat belts are disabled or removed
OFI-110: Review Tarkwa Communications Infrastructure and Radio Use. OFI-151: Review site processes and confirm that they are adequate to support required radio communications. OFI-147: Review Light Vehicle Prestart Process BI-ERA.32.07 Prestart checks of radio and other communication devices

Prestart checks confirm that mobile equipment operators and people who work around mobile equipment can communicate.

Mobile equipment operators and personnel who work around mobile conduct prestart checks that confirm:

  • Radios are working
  • Radios are set on the correct channel
  • Other communication devices are working and set up correctly (where relevant)

There is a well-defined site defect management process to manage faults in communications equipment before and during operations. It includes what to do when there is a fault.

Radio and other communication device users are trained in:

  • Site call up and response standards
  • Managing faults and defects
  • Emergency calls
  • Equipment prestart checks

OFI-151 Review site processes and confirm that they are adequate to support required radio communications.

Workshop participants discussed site processes and schedules for the routine checking of radios in mobile equipment. This includes prestart checks, defect reporting, and scheduled maintenance of radios and site infrastructure. It also incudes confirming minimum requirements for radios in heavy mobile equipment, service vehicles, light vehicles and for pedestrians.

Surface mining operations typically deliver safe and productive outcomes using radios to support disciplined positive communications to manage interactions in working areas. Workshop participants report that radio faults do occur and that pre start and routine schedules for checking radios and communication infrastructure are inconsistent.

Review site processes and confirm that they are adequate to support required radio communications. Involve Business Partners in the review.

OFI-110 Review Tarkwa Communications Infrastructure and Radio Use.

Workshop participants report that there are ongoing site issues with communication equipment, including competition for radio use, incorrect use of radios, and network blind spots in the mine.

Effective radio and data communications are essential for safe and productive mine operations and cover positive communications and dispatch.

Review radio use discipline, radio availability e.g. radios in light vehicles accessing the pit, network coverage etc. Establish site minimum standards.

Training record reviews.

Prestart records confirm that checks are completed.

Supervisors monitor and coach on the quality of operator prestart checks.

Maintenance planners review prestart forms and raise work orders as required.

As required investigations of communication faults.

OFI-147 Review Review Light Vehicle Prestart Process

Light vehicle prestart checks are required and carried out at Tarkwa mine.

Workshop participants report that LV prestart checks are generic and do not include installed technology and communications equipment. Also some forms are not submitted on time.

Review Light Vehicle prestart check process, confirm that reporting and defect management processes are satisfactory. Confirm requirements for prestart checks for CAS and OAS technology and communications equipment.

CFM-CPA.11.10 Operators or co-workers have required communications equipment but are not contactable CFM-EPA.33.40 Communication equipment absence, failure or poor reception CFM-MPA.66.01 Incorrect communication protocol
OFI-147: Review Light Vehicle Prestart Process OFI-111: Include CAS and OAS Checks in Pre-Starts OFI-118: Review frequency of mobile equipment alarm system checks. BI-ERA.32.11 Prestart checks of mobile equipment alarms and monitors

Prestart checks confirm that mobile equipment alarms, monitors and information panels are working.

Mobile equipment operators conduct prestart checks, or monitor equipment self-checks, to confirm alarms, monitors, and information panels are working.

There is a well-defined site defect management process to manage faults before and during operations. It includes what actions to take based on fault type.

OFI-111 Include CAS and OAS Checks in Pre-Starts.

Workshop participants discussed how Collision Avoidance Systems (CAS) and Fatigue Management (OAS) devices are checked before use.

It is reported that CAS and OAS checks are not part of operator pre-start equipment checks.

Review mobile equipment pre-start check process, consider opportunities to include OAS and CAS technology checks. Confirm fault categories and expected actions if faults or defects are reported.

Mobile equipment operators are trained and competent in conducting and monitoring equipment prestart checks. This training includes:

  • Alarm checks
  • Alarm response
  • Monitor and information panel check
  • Monitoring status and responding to monitor and information panel checks
  • Managing faults and defects during operations
  1. Training record review confirm the currency of vehicle operator skills including alarm and other indicator prestart checks and meanings and expected response.
  2. Prestart records confirm that checks are completed.
  3. Supervisors monitor and coach on the quality of operator prestart checks.
  4. Maintenance planners review prestart forms and raise work orders as required.
  5. As required investigations of alarm, monitor, and information panel faults.

OFI-147 Review Review Light Vehicle Prestart Process

Light vehicle prestart checks are required and carried out at Tarkwa mine.

Workshop participants report that LV prestart checks are generic and do not include installed technology and communications equipment. Also some forms are not submitted on time.

Review Light Vehicle prestart check process, confirm that reporting and defect management processes are satisfactory. Confirm requirements for prestart checks for CAS and OAS technology and communications equipment.

OFI-118 Review frequency of mobile equipment alarm system checks

Workshop participants discussed the frequency and adequacy of maintenance checks and testing of vehicle alarm and alert systems. They raised questions about consistency, quality, and scheduling of checks.

Concerns were raised on alarm systems that do not fail-to-safe. They also recognised that defective or non-functioning alert and alarm systems during vehicle operations can result in significant incidents and equipment damage.

Review site processes for checking and tests of mobile equipment alarms. Consider both OEM installed third-part technology alarms.

CFM-CRA.10.30 Proximity alarms do not assist operator CFM-CRA.11.22 Operator ignores or bypasses alarm or safety device CFM-ERA.32.20 Operator fails to conduct effective pre-start that meets requirements CFM-ERV.33.23 Seat belt use indicators disabled or compromised CFM-SRA.92 Unit key system status and alarms are not monitored
OFI-163: Review Road Construction and Maintenance Standards. OFI-162: Review mine planning input to speed limits. OFI-157: Review road maintenance practices for vegetation control. OFI-141: Review, update, and apply the Tarkwa Traffic Management Plan. BI-LDA.41.01 Road design guidelines set minimum standards for the construction and maintenance of the road network

Site tailored road design standards support the delivery of safe and productive outcomes and are applied to construct and maintain haul roads, ramps, benches, loading and dumping areas, parking areas, access to service areas and other relevant infrastructure.

The site road design specifications consider prevailing weather conditions, equipment in use, operator experience, available construction materials, tyre and equipment life, equipment maintenance, fuel usage, and productivity.

Site road design guidelines provide tailored specifications for:

  • Physical constraints: Width of pavements, sizes of roadways, linear and cross grades, and ramp size (guidance based on type of equipment in use and tasks undertaken); Curvature (both horizontal and vertical); pavement shape
  • Site specific requirements: Emergency stopping and run-off areas if required for long downhill sections of roadway; Surface / pavement material; Construction or mining of segregated roadways that separate heavy mobile equipment and light vehicles; Parking areas covering location, size, and delineation; Storage areas covering separation, segregation and access requirements; Workshops, fuel bays and battery charging locations (considering any introduced flammable liquids or gases, distances, and traffic flow requirements); Stockpiles; Access to bins or tip points (crushers, passes, etc.); Safety berms or windrows; Dump geometry (including tip heads); Roadways around infrastructure e.g. overhead HV lines; Line of sight for equipment operators (including orientation of UG portals, break-aways and intersections, workshops, management of doors and ventilation screens, and longer haul roads)
  • General road network features: Guideposts, delineators, roadway signage (beside or above roadway); Signs and barriers; Lighting (area and traffic control); The installation of one way block lights for intersections, long driveages and drifts; Location and requirements for installation of required infrastructure (pipes, cables, lighting, etc.)

Accountabilities are assigned for the complete road network life-cycle: Preparing designs; Processes to achieve as-built sign-off; Roadway inspections; Scheduled roadway maintenance; Interim repair works; Decommissioning or moving to alternate uses.

GHG Tarkwa Traffic Management Plan, Mining Operations Procedure, TGM 1.10.54 WI as approved for use 01-03-07

Section 6 Traffic Standard gives guidance on design, construction, layout, and key parameters such as pavement width, gradient and cross slope, edge protection, intersections (including round-abouts (circles)), and maintenance requirements.

6.1.2.7. Road Intersection Intersections shall be at 90 degrees and crossroad intersections shall be avoided, wherever possible.

6.1.2.8. Acceptable (preferred) intersection since the side road is at 90 degrees to the main road Round About This type of intersection shall be avoided wherever possible Roundabouts should regulate the intersection of no more than two roads wherever possible. All roads are given the same level of priority and traffic is to give way to the LEFT. This will be shown with roundabout YEILD signs placed on all approaches to the intersection. Roads should intersect at 90°. Major roads joining a roundabout will be divided down their centre line by a traffic island at least 5m long.

OFI-141 Review, update, and apply the Tarkwa Traffic Management Plan

GHG Tarkwa Traffic Management Plan, Mining Operations Procedure, TGM 1.10.54 WI was first approved for use on the 01-03-07. It is still current but has not been reviewed and updated since initial publication. It is a comprehensive document that confirms a range of site design and operating requirements that reflect good mine design and operating practice at Tarkwa.

However, during the Tarkwa 2024 Vehicle Interaction Control Effectiveness (VICE) review, workshop participants identified misalignments between this key reference document and operational practice and conditions. These include:

  • Road and ramp conditions – construction and maintenance
  • Non-conforming intersections and circles (roundabout) design and construction 
  • Limited availability and use of radios for general pit communications
  • Unclear Positive communications e.g. passing, and approaching mobile equipment
  • Obscured or missing Traffic Signage
  • Lack of infrastructure and signage to support management of pedestrians
  • Parking practices not aligned with documented requirements for physical segregation from heavy vehicles

These issues were confirmed by supporting consultants during mine tours and interviews.

Consider a review of the Tarkwa Traffic Management plan in conjunction with the development of Gold Fields Minimum Standards for Vehicle interaction controls. At a minimum the review should revisit and update minimum requirements for:

  • Intersection design – bench mark against industry developments since 2007 including defaults to T intersections where possible
  • Simplifying intersection design and construction to fully leverage upgrades and to support successful further deployment of CAS technology
  • Road and ramp maintenance
  • Positive communications protocols and practices

Road networks (and excavations) are constructed following design guidelines and ‘as built’ is checked off against design before handover.

Maintenance crews reference design guidelines during routine maintenance, repair e.g. after flooding and upgrades, to confirm that minimum standards are in place.

Routine mine road housekeeping rapidly removes spillage, maintains good water drainage, repairs potholes, rutting and depressions.

GHG Tarkwa Traffic Management Plan, Mining Operations Procedure, TGM 1.10.54 WI as approved for use 01-03-07

6.1.3. Road Maintenance and Repair

Roads must be regularly maintained so that they do not develop bumps, ruts or potholes, which may make control of vehicles difficult or cause health problems due to whole-body vibration.

OFI-163 Review Road Construction and Maintenance Standards

Workshop participants report that haul road construction and maintenance is sometimes inadequate.

Issues include steep ramps sometimes greater than 10%, rough ramps, substandard maintenance on haul roads. This situation increases equipment and tyre damage, slows production, and physically stresses operators.

Confirm Tarkwa Mine road design standards and update processes to construct and maintain infrastructure to site standards.

OFI-162 Review mine planning input to speed limits.

Workshop participants discussed how and when mobile equipment speed limits are set during the mine planning and design processes.

Incorrect speed limits can lead to vehicle over speed events e.g. when cresting and tyre overheating.

Review and confirm the processes for setting site speed limits is considered during mine design and planning.

OFI-157 Review road maintenance practices for vegetation control.

Workshop participants confirmed that there are frequently tree branches close to roads or extending onto pavements.

Branches and then other obstructions on roadways can lead to incidents occurring.

Review and update road maintenance practices to include addressing encroaching vegetation and dead fall.

In date and approved site road design guidelines and supporting resources.

Sign-off records of as built and as maintained against design standards.

Work area inspections non-conformance reports and analysis.

CAS technology heatmaps and reports.

Monitoring of equipment operators reporting and resolution of debris and deterioration.

CFM-CDA.06.02 Operator drives vehicle at the incorrect speed (too fast or too slow). CFM-CPA.11.05 Operator does not drive on available segregated roads CFM-MDA.61.06 Inadequate work planning means that heavy vehicle operators approach fixed structures that are incidental to achieving operational outcomes CFM-MPA.65.04 Light vehicle remains in heavy vehicle blind spot due to intersection approach speeds CFM-SDV.81.20 Inadequate mine traffic management plan (specification) CFM-CPA.10.02 Operators unaware of give way requirements for light vehicles
OFI-173: Improve in pit lighting and monitor status. OFI-107: Improve site delineation processes and practices. OFI-141: Review, update, and apply the Tarkwa Traffic Management Plan. BI-LPA.42.04 Lighting, delineation and signs are installed and maintained to standards that meet minimum site road design requirements.

There are minimum standards for the installation, inspection and maintenance of lighting, delineation, and signs that assist vehicle operators maintain situational awareness.

Designs and construction requirements include standards for lighting of high traffic areas (e.g. around the mine infrastructure areas, vehicle (including remotely controlled) operating areas, dump edges, intersections, etc.) and signs to alert vehicle operators of road network requirements.  Permanent signs are erected to provide warnings around fixed infrastructure and temporary signs or warning devices (traffic cones, barrier tape, etc.) are used around temporary work areas or road network hazards not yet repaired.

Survey marks out the requirements for road network infrastructure to meet site requirements.

Road construction crews place and maintain permanent and temporary lighting, communication and information signage around the road network.

Work crews place demarcation and warning signage around their work areas and nominated access routes.

‘As built’ is checked off against design by operations.

GHG Tarkwa Traffic Management Plan, Mining Operations Procedure, TGM 1.10.54 WI as approved for use 01-03-07

6.1.6. Traffic Signage Road signs are located on all roads throughout the site. They shall be obeyed at all times and apply to light and heavy vehicle drivers. Sufficient warning signs need to indicate potential dangers. Signs shall be kept clean and well-maintained so that they are always visible. No vehicle is to proceed beyond a no-entry sign or barricade unless the specific authorization of a supervisor has been obtained.

OFI-141 Review, update, and apply the Tarkwa Traffic Management Plan

GHG Tarkwa Traffic Management Plan, Mining Operations Procedure, TGM 1.10.54 WI was first approved for use on the 01-03-07. It is still current but has not been reviewed and updated since initial publication. It is a comprehensive document that confirms a range of site design and operating requirements that reflect good mine design and operating practice at Tarkwa.

However, during the Tarkwa 2024 Vehicle Interaction Control Effectiveness (VICE) review, workshop participants identified misalignments between this key reference document and operational practice and conditions. These include:

  • Road and ramp conditions – construction and maintenance
  • Non-conforming intersections and circles (roundabout) design and construction  
  • Limited availability and use of radios for general pit communications
  • Unclear Positive communications e.g. passing, and approaching mobile equipment
  • Obscured or missing Traffic Signage
  • Lack of infrastructure and signage to support management of pedestrians 
  • Parking practices not aligned with documented requirements for physical segregation from heavy vehicles

These issues were confirmed by supporting consultants during mine tours and interviews.

Consider a review of the Tarkwa Traffic Management plan in conjunction with the development of Gold Fields Minimum Standards for Vehicle interaction controls. At a minimum the review should revisit and update minimum requirements for:

  • Intersection design – bench mark against industry developments since 2007 including defaults to T intersections where possible
  • Simplifying intersection design and construction to fully leverage upgrades and to support successful further deployment of CAS technology
  • Road and ramp maintenance
  • Positive communications protocols and practices

OFI-173 Improve in pit lighting and monitor status.

Poor levels of lighting and area lighting in the Pit on nightshift can lead to operator errors.

Workshop participants discussed and confirmed regular situations where lighting in the pit areas is below standard.

Review the standards for and practices around installing lighting towers and other area lighting in and around the pit. Consider developing across shift reports confirming lighting measurement status meets site standards.

OFI-107 Improve site delineation processes and practices.

Workshop participants discussed and confirmed that delineators are not always visible around road network.

Operators rely on the spacing of delineator to assist with maintaining clearance when following other vehicles.

Review current standard for installing delineators, compare with site practices for road construction, inspection, and maintenance. Consider developing a site program to improve and maintain delineation standards and other road network standards e.g. signage and lighting.

Survey records.

As built plans with sign-off.

Workplace inspections.

By exception incident investigations.

CFM-CPA.11.05 Operator does not drive on available segregated roads CFM-LPA.42.03 Obscured or missing signage CFM-MPA.63.04 Parked vehicles block view for pedestrians and other equipment operators CFM-CPA.10.02 Operators unaware of give way requirements for light vehicles
OFI-135: Review speed limit communication and enforcement. OFI-119: Confirm and apply calibration requirements for VIMS speed monitoring. BI-LRA.42.02 Speed and operating environment parameter data send

Relevant equipment operating data is used to improve the design, construction, and maintenance of the operating environment.

Equipment operating data relevant to the design, construction, and maintenance of the operating environment is captured and transferred and may include:

  • Speed
  • Travel paths
  • Engine performance
  • Loading
  • Others

Specifications for how equipment data related to the operating environment is aggregated, sorted, monitored, reported, and analysed are in place.

On-board systems monitor equipment usage, data is transferred via site infrastructure.

The data is aggregated and sorted so that it can be used for performance monitoring, reporting, and analysis.

OFI-119 Confirm and apply calibration requirements for VIMS speed monitoring

Workshop participants discussed how vehicle speed at Tarkwa Mine is measured using VIMS.

They noted recent concerns about the system calibration and accuracy so that there is confidence that reliable information is being captured and reported.

Confirm and apply the minimum requirements for calibration of vehicle measuring systems.

Accurate, timely, and tailored reports on operating environment impacts on equipment are provided to operators, supervisors, mine planners, maintenance personnel, training, and management.

Reports are reviewed and performance drifts are identified and corrected.

OFI-135 Review speed limit communication and enforcement.

Workshop participants discussed incidents cause by speeding at Tarkwa including vehicle roll overs and slides. They also consider situations where vehicles travelling too slowly have caused traffic issues on both access and haul roads.

Slow moving vehicles generate driver frustration and potential for higher risk driving manoeuvres. Speeding above limits increase the likelihood of vehicles losing control.

Review site processes for communicating, monitoring and reinforcing the requirements to travel at zoned speeds and adjust for conditions and circumstances.

CFM-CRA.11.21 No action taken on over speed alarm CFM-CRA.11.22 Operator ignores or bypasses alarm or safety device CFM-ERA.31.09 Installed equipment system status alarms do not operate CFM-ERA.40.22 Over speed warning alarm fails to operate CFM-SRV.96.20 No aggregated monitoring and response to over speed alarms
OFI-137: Review understanding for applying processes when there are significant changes in operating conditions or circumstances. BI-LTA.56 Formal processes for managing changes in conditions

There are formal processes in place for managing changes in conditions that can compromise safe production.

Procedures in place for managing changes to normal mobile equipment operations covering:

  • Electrical storms
  • High winds and raised dust
  • Reduced visibility (e.g. fog, mist, loss of area lighting)
  • Road pavement conditions (wet, damaged, etc.)
  • Compromised access controls, etc.

Also conditions which compromise normal road traffic operations such as:

  • Limited access to working areas
  • Short term work plans increase vehicle movements and interaction intensity
  • External traffic movements e.g. escorting loads

Consider developing Trigger Action Response Plans for site relevant changes in conditions. Use gradated levels with required responses such as:

  • Green Level. Threat is not present or can be well managed using routine processes and equipment.
  • Yellow Level (optional). Threat is present but not yet hazardous. This level is communicating situation detail, increasing awareness, and monitoring and communication changes.
  • Amber Level. Threat level has increased and can be managed through changes to processes and heightened vigilance of workers and supervisors.
  • Red Level. Threat is continuing to increase and workers (apart from any deployed to reduce the threat) are withdrawn to safe locations.

Supervisors and workers are trained in developed TARPs and their competence is confirmed.

Conditions beyond those expected trigger an appropriate response from sites escalating awareness and ceasing operations as appropriate.

Significant (Amber and above) triggers are communicated to more senior personnel on site.

Training and awareness records.

TARP levels and site responses are approved and in-date.

Records of communications and notifications of Amber and Red levels, including with external parties as required.

OFI-137 Review understanding for applying processes when there are significant changes in operating conditions or circumstances.

Workshop participants confirmed that there are site processes in place for dealing with changes in operating conditions and circumstances e.g. third parties on mine site.

However, they questioned knowledge and awareness levels on the application of these processes, including triggers for their implementation and key actions that follow.

Review understanding and capability of operators and other in-field personnel e.g. drillers and field maintenance to notify and act on changes in operating conditions and circumstances.

CFM-CDA.06.02 Operator drives vehicle at the incorrect speed (too fast or too slow). CFM-CRA.03.01 Operator fails to identify and act on changes in conditions: reduced visibility, road narrowing, road surface etc.
OFI-106: Consider Developing a site TARP to consistently manage Electrical Storms. BI-LTA.58.01 Lightning and Extreme Weather Management

There are formal processes in place for managing heavy rain, electrical storms, and other extreme weather events.

Procedures in place for storm situations and other weather impacts on roads and mobile equipment operations.

Develop and implement a process to minimise potential for fire from lightning strikes and other weather impacts 

  • Monitor lightning activity using meteorological forecasts and other early warning detection systems
  • Lightning protection or diversion systems should be installed in accordance with appropriate standards (e.g. National Fire Protection Agency 780 2011 Standard for Installation of Lightning Protection Systems; AS/NZS 1768 2007 Lightning Protection)
  • Provide timely communications to allow sufficient time for all exposed site personnel to seek appropriate safe shelter
  • Place equipment in protected area away from fuel sources (i. stop damage; ii. Stop spread to fleet)
  • Instigate awareness training for workers that highlights the risks of lightning strikes and other exposure to weather related impacts (slippery roads, etc.) 
  • Develop a trigger action response plan (TARP) for lightning and electrical storms that outlines responses to a storm at certain distances away from the mine (e.g. a staged response depending on distance)
  • Procedure for the use and protection of explosives in known lightning conditions

OFI-106 Consider Developing a site TARP to consistently manage Electrical Storms.

Workshop participants confirmed managing Electrical Storms (lightning) at Tarkwa Mine is decided on a case by case basis. They also discussed how weather tracking radar might be used to monitor the distance to storm fronts.

This approach does not deliver a consistent response to managing the hazards from electrical storms such as lightning strikes on heavy mobile equipment causing tyre bursts, premature detonation of explosives, or strikes to pedestrians in the open.

Confirm the ability to track the distance of electrical storms from Tarkwa. Benchmark and adapt approaches that have been developed and deployed at other Gold Fields surface operations e.g. Trigger Action Response Plans (TARPs) that detail actions to be taken when there is an electrical storm based on distance from site.

Training and assessment in the process and threshold for initiating the ceasing operations process for mobile equipment operators, supervisors, and managers during storms and other weather conditions impacting road network safety

Summary information on the process steps and thresholds is available on Trigger Action Response Plans (TARP) or equivalent.

The summary information includes site relevant weather condition thresholds and expected actions when it is no longer safe to continue normal operations using mobile equipment.

Supervisors monitor activities of Vehicle Operators during storms – confirming their activities meet site requirements.

Training records are regularly checked to confirm currency of workers understanding around storm and lightning response requirements.

CFM-CRA.03.01 Operator fails to identify and act on changes in conditions: reduced visibility, road narrowing, road surface etc. CFM-LPA.56.01 Operations continue when operating environment is significantly compromised
OFI-139: Confirm and Communicate Plan and Timelines for CAS installation. OFI-130: Leverage technology to improve vehicle interaction monitoring by category and location. OFI-127: Identify and link VICE workshop outputs relevant to the CAS Project. BI-MRA.71.03 Selecting and Deploying Proximity Detection Systems and other Technologies

Proximity Detection Systems meet site functional, performance, and technical requirements and deliver capable solution outcomes.

Proximity Detection Systems are selected to deliver site relevant Capable Solution Use Case

  • A capable solution delivers better vehicle interaction control performance by improving the quality of decision-making from task execution through to mine operations and design.
  • A capable solution considers relevant aspects of the operating environment, production requirements and equipment design.
  • Where technology is a part of a capable solution, it is operationally integrated.

The Capable Solution Use Case has these elements:

Technology Functional Requirements – these define what new technology Vehicle Interaction Controls can and do not do.

  • Identify relevant company vehicle interaction requirements for new technology controls (EMESRT Level 8 and 9) based on operation type: e.g. underground coal mining, underground hard rock mining, open cut mining, refinery etc.
  • Upgrade potential, data management and fit with future mine digitisation plans and other relevant information for each option.
  • Compare site and company requirements, identify any difference e.g. additional site-specific requirements and/or restrictions e.g. requirement for machine swing interlocks, orebody precludes use of magnetic field PDS etc.

Technology Performance Requirements – site performance requirements are determined by site personnel considering the site personnel considering the consequences of operating without the new technology control in place.

  • Review site equipment defect reporting and classification processes.
  • Working with operational personnel, set version 1 of expected performance parameters.
  • Summarise site expected performance capability, installation and maintenance costs, upgrade potential, data management and fit with future mine digitisation plans and other relevant information in that can be deployed in a Request for Proposal (RFP) and to assess responses.

Site Technical and Infrastructure Requirements – where relevant, these cover technical requirements to support the deployment, installation, and operational integration of new controls e.g. extensions of site WiFi networks, installation of private 5G networks.

Include questions on technical and infrastructure requirements in Request for Proposal (RFP).

Prepare a site functional, performance and technical specification for use when issuing a Request for Proposal (RFP), assessing, and selecting VI Collision Control technology options offered by Original Equipment Manufacturers (OEMs) and Third-party technology suppliers.

Applying User Requirements to assess and select technology to:

  • Prepare a comprehensive Request for Proposal (RFP) for potential collision control technology provider Capable Solution User Requirements
  • Issue the RFP to potential technology providers asking for details of how their product performance against site functional and performance requirements.
  • In the RFP, confirm site technical and infrastructure requirements if that technology option is selected.
  • Review each RFP response and summarise capability, installation and maintenance costs, logistical support, upgrade potential, data management and fit with future mine digitisation plans and other relevant information for each option.
  • Select the best fit from technology suppliers and prepare a shortlist for senior management review and decision.
  • Include and assessment of the costs and benefit of each shortlisted option including:
  • The Credible Failure Mode(s) being addressed from VICE Baseline
  • Potential new Credible Failure Modes
  • Impacts on other current Vehicle Interaction Controls
  • Practicality and impact, has the approach been applied elsewhere?

Pilot work with technology option personnel and experienced site personnel to:

  • Plan a feasibility pilot for vehicle interaction control improvement technology projects approved by senior management (consider a multi-stage feasibility pilot with stage gates to identify and deselect shortlisted options that do meet site expectations)
  • Train people who will work directly with the technology option and make the balance of the workforce aware of the feasibility pilot(s).
  • Report back on feasibility pilot results and confirm the results align with User Requirements, include feedback from operational personnel involved in the feasibility pilot.
  • Summarise the outcomes from each technology option feasibility pilot against Site User Requirements. Consider functional, performance, technical, infrastructure, logistics and support requirements if the technology option is selected.

Based on the pilot results, make a go- or no-go decision on operational deployment.

OFI-139 Confirm and Communicate Plan and Timelines for CAS installation

At the time of the November 2024 Vehicle Interaction Control Effectiveness (VICE) review, only part of the mobile equipment fleet at Tarkwa mine was operating with collision avoidance systems (CAS) installed.

Mobile equipment operating without an installed CAS system installed is invisible. Workshop participants support the further installation of CAS systems and consider that light vehicles are a priority category.

Communicate details on project priorities, timelines for installation, and management commitment to further improve vehicle interaction controls at Tarkwa Mine.

OFI-127 Identify and link VICE workshop outputs relevant to the CAS Project

Workshop participants highlighted the importance of getting the collision avoidance system in place and operating at Tarkwa.

Lack of complete coverage of CAS leads vehicles not being readily visible in operations and there are many failure modes. Many of these can be addressed by having test stations installed at all go lines.

Workshop participants support the CAS project and support linking their issues and opportunities for improvement captured in the VICE workshop to the project.

When implementing vehicle interaction control improvement technology projects consider:

  • Demands on operations during deployment e.g. releasing personnel for training, making mobile equipment available for technology installations.
  • Logistics and infrastructure upgrade timing, these may be determined by availability of technology and key personnel.
  • Practical management of performance requirements e.g. how are technology failures managed.
  • Following deployment what roles will be accountable and responsible for control effectiveness, involve these roles in operational deployment before project handover.
  • Stakeholder management covering how feedback will be captured during deployment and after handover.
  • Impacts on existing site process and approaches e.g. supervisor workloads, availability of technicians for maintenance and repairs, capacity of digital infrastructure, reporting capability etc.
  • The direct performance metrics provided by technology, including how the information will be applied to support decision making at multiple levels including:
  • Responses to non-standard events detected by technology.
  • Adjustment of technology configurations and thresholds based on site functional requirements.
  • Applying aggregated data to review and improve current design and operating approaches.
  • Practical management of performance requirements e.g. how are technology failures managed.
  • How to leverage new performance metrics indirectly to improve understanding of the effectiveness of existing vehicle interaction controls.

OFI-130 Leverage technology to improve vehicle interaction monitoring by category and location.

As with every other large mining operation, there are thousands of vehicle interactions each day at Tarkwa mine. Without leveraging technology, analysing interaction patterns at scale is not possible.

Current approaches to assess and monitor performance are based on observations by individuals.

Explore if CAS technology, or technology combinations such as CAS and Dispatch can be used to identify different subsets of vehicle interactions e.g. heavy vehicle to light vehicle, pedestrian interactions, service truck, maintainer vehicles to operations equipment etc. If it can, consider the value of developing performance measures for different categories of vehicle interaction. Include location in the analysis.

CFM-CPA.11.01 Equipment operator or pedestrian mistake in estimating clearance distance CFM-CRA.10.30 Proximity alarms do not assist operator CFM-CTA.11.34 Incorrect action taken on proximity alarm CFM-MDA.61.01 Reducing vehicle interactions by maintaining clearances is inadequately considered routine work planning CFM-MDV.71.01 Proximity alarms do not perform to specification (false negatives and false positives) CFM-SDV.81.20 Inadequate mine traffic management plan (specification)
OFI-153: Review in pit parking planning and practices. OFI-141: Review, update, and apply the Tarkwa Traffic Management Plan. BI-LDV.43 Road design guidelines specify minimum parking area requirements

Parking area designs are fit for purpose. Parking areas are constructed and maintained to meet site requirements.

Parking area designs and construction include layouts for crib areas that segregate vehicle types and provide walkways at safe locations.

GHG Tarkwa Traffic Management Plan, Mining Operations Procedure, TGM 1.10.54 WI as approved for use 01-03-07 provides comprehensive details in site parking requirements in Section 6.3.7. Parking. This covers:

  • Parking in an inherently stable manner
  • Locations where parking is permitted
  • Locations where parking is not permitted
  • Leaving a vehicle 
  • Use of chocks
  • 15m distance from edge or toe of a high wall
  • Moving off after parking

OFI-141 Review, update, and apply the Tarkwa Traffic Management Plan

GHG Tarkwa Traffic Management Plan, Mining Operations Procedure, TGM 1.10.54 WI was first approved for use on the 01-03-07. It is still current but has not been reviewed and updated since initial publication. It is a comprehensive document that confirms a range of site design and operating requirements that reflect good mine design and operating practice at Tarkwa.

However, during the Tarkwa 2024 Vehicle Interaction Control Effectiveness (VICE) review, workshop participants identified misalignments between this key reference document and operational practice and conditions. These include:

  • Road and ramp conditions – construction and maintenance
  • Non-conforming intersections and circles (roundabout) design and construction 
  • Limited availability and use of radios for general pit communications
  • Unclear Positive communications e.g. passing, and approaching mobile equipment
  • Obscured or missing Traffic Signage
  • Lack of infrastructure and signage to support management of pedestrians
  • Parking practices not aligned with documented requirements for physical segregation from heavy vehicles

These issues were confirmed by supporting consultants during mine tours and interviews.

Consider a review of the Tarkwa Traffic Management plan in conjunction with the development of Gold Fields Minimum Standards for Vehicle interaction controls. At a minimum the review should revisit and update minimum requirements for:

  • Intersection design – bench mark against industry developments since 2007 including defaults to T intersections where possible
  • Simplifying intersection design and construction to fully leverage upgrades and to support successful further deployment of CAS technology
  • Road and ramp maintenance
  • Positive communications protocols and practices

Designs are executed by road construction crews – placing windrows and berms as required to segregate vehicle types and walkways.

Supervisors direct and monitor the activities of road maintenance and construction crews.

OFI-153 Review in pit parking planning and practices.

Workshop participants advised that restrictions in mine working areas leads to narrow access roads, confined work areas, frequent interactions between workgroups, poor siting of light vehicle parking areas, and sometimes an absence of parking.

Poorly parked mobile equipment creates vehicle interaction hazards e.g. when heavy mobile equipment departs from a parked position.

Confirm that parking area planning and design processes are adequate and monitor in pit parking practices.

Commissioning and handover records confirming that ‘as built’ meets design requirements

Supervisor inspection records.

CFM-LDA.43.01 Vehicle parking, including emergency parking is inadequately considered in mine design and routine work planning CFM-MPV.63.02 Light vehicles stop or park in heavy vehicle blind spots CFM-SDV.81.20 Inadequate mine traffic management plan (specification)
OFI-100: OFI-100 Review site processes for managing non-standard loads. BI-MDV.65.31 Clear requirements for loading and unloading of trucks by excavator or loader

Loading, transporting and dumping (unloading) of mobile equipment with bulk materials is safe and productive.

The loading system must be designed so that the vehicle cabin is prevented from being under a load that could exceed the maximum weight impact for the cabin or impact vehicle stability.

Operational and safety requirements are specified in procedures and other documents and media e.g. instructional videos. They provide information to the operator about:

  • Vehicle access
  • Vehicle loading, travelling and unloading (including waste)
  • Vehicle exit
  • Leaving the vehicle during loading
  • Emergency response

They include relevant change management thresholds such as:

  • Changes in vehicle type
  • New operators

OFI-100 Review site processes for managing non-standard loads.

Workshop participants discussed site processes and practices for the safe movement of non-standard loads. They identified gaps in how operators are informed and the application of required controls for managing non-standard loads.

Review site documentation for movement of loads and associated training modules and confirm that control advice is adequate e.g. maintaining load stability for wet bulk loads, load placement, route planning, use of escorts, the role of spotters when reversing etc.

Engineering sign-off that the loading system and the vehicle in use meet are fit for use.

Vehicle operators are trained and assessed in loading requirements, including emergency response.

Supervisor oversight.

Equipment selection records.

Training records.

Supervisor inspection records of loading operations.

CFM-SDV.81.20 Inadequate mine traffic management plan (specification)
OFI-155: Review processes for managing equipment breakdowns and field repairs. BI-MDA.67.01 Protocols for working on equipment in production areas

Personnel undertaking inspection, servicing, maintenance or recovery work on equipment in operational areas are protected from mobile equipment and other workplace hazards.

Sites have a consistent, defined, and measurable process for managing mobile equipment and other hazards in production areas during:

  • Inspection
  • Equipment servicing
  • Equipment maintenance work
  • Equipment recovery

The process defines:

  • Where, and in what circumstances it applies
  • Hazard identification and control assignment
  • How decisions on delineation are made and deployed
  • The experience and competency required before authorisation to work in a production area
  • Communication requirements
  • Responsibilities of trades and service personnel
  • Mobile equipment responsibilities
  • Production area owner responsibilities

Trades, service and other personnel meet site requirements for working on equipment in production areas – with placement of windrows, barriers, cones, warning signage, geo fences and other measures implemented.

Designated and segregated in-pit work areas.

Communication protocols with mine controller and supervisor.

OFI-155 Review processes for managing equipment breakdowns and field repairs.

Workshop participants advise that broken down equipment in the operating environment is often not secured and protected. Also significant in-pit repairs are carried out at Tarkwa by the Business Partners.

Broken down equipment parked on, or being repair beside, hauls roads creates vehicle interaction hazards. There are a range of well established controls that include communication, demarcation, and longer term protection using earth bunds etc.

Review, update and train personnel in understanding how to apply site standards to manage broken down equipment. Confirm that supervisors monitor that controls are in place and make corrections when required.

Planning documentation.

Operational logs for service and maintenance personnel.

Authorisation records for personnel who carry out servicing and maintenance tasks in operational areas.

Notification records.

Maintenance, production supervisors, and mobile equipment operators monitor performance.

Maintenance and production supervisors monitor trades and service personnel to confirm performance.

CFM-CRA.03.20 Personnel do not manage heavy vehicle blind spots CFM-MPA.63.01 Operator does not meet site requirements when parking CFM-MPA.72.03 Mobile equipment operator or pedestrian does not notify when entering a controlled work area CFM-MPV.63.02 Light vehicles stop or park in heavy vehicle blind spots CFM-SDV.81.20 Inadequate mine traffic management plan (specification)
OFI-164: Review site planning for escorts OFI-160: Review escort process consider qualifications and authorisation. OFI-105: Review site escort training and approval processes. BI-MDA.72.11 Escort Requirements

Vehicles and operators that are not approved for unrestricted site access, are escorted. Site escort requirements are clear and deliver safe and productive outcomes.

Sites have a consistent, defined, and measurable escort process for managing access when:

  • When vehicles are not approved for general site access
  • Vehicle operators who do not have required site permits or licences

The escort process defines:

  • Where, and in what circumstances it applies
  • The experience and competency required before an escort is authorised
  • Who must be notified, how they are notified, and when they are notified
  • Communication requirements between the vehicles under escort and the escort
  • Equipment required e.g. radios, lights, Collision Avoidance Systems, flags, etc.
  • Approval steps and documentation requirements e.g. permits, gatehouse logs etc.

OFI-105 Review site escort training and approval processes.

At Tarkwa Mine, site engineering procedures confirm requirements for providing escorts in operating areas. Workshop participants discussed training for personnel who drive the light vehicles that provide escorts covering radio communications, route planning, speed, load management etc.

They recognised that current site practices could lead to situations where less experienced personnel with inadequate site knowledge were used to provide escorts.

Consider the benefits of formal training and approval processes for site escorts, based on site procedures.

The site escort process is applied, and vehicle operators being escorted are briefed on:

  • Communication protocols
  • Travel separation distances
  • Restricted locations
  • Road conditions
  • Emergency protocols
  • Other site requirements 
  • Parking and first movement requirements

Personnel who provide the escort are authorised and competent, and confirm that escorted vehicles are operated and parked in accordance with site requirements.

Required site documents are completed.

OFI-164 Review site planning for escorts

Tarkwa Mine has established escort requirements for explosive trucks and non-site equipment such as mobile cranes.

Workshop participants discussed requirements and identified situations where site escort processes have not been applied i.e. a driver unfamiliar with site traffic requirements was operating on site.

Review site work planning and logistics control processes, confirm they include a step that identifies when escort is required with timely notification to operations so that escorts are available at the required time.

OFI-160 Review escort process consider qualifications and authorisation.

Workshop participants advised that there are occasions where external parties provide escorts to site locations.

Escorts provided by external parties introduce training and experience issues. The practice can also lead to situations where an external escort is unaware of updated or temporary site traffic requirements and situations.

Review site minimum standards for escort qualifications and authorisation. Include site communication requirements e.g. radio channels, use of CAS, informing operations etc.

Escort documentation.

Authorisation records for personnel approved to act as escorts.

Escort notification records.

Supervisors and mobile equipment operators monitor performance of escorts and escorted vehicles.

CFM-CPA.10.20 Operators of heavy and light vehicles (or pedestrians) fail to follow the designated travel path CFM-MPA.72.02 Operational access control (pedestrian and vehicle) is inadequate
OFI-126: Develop a walkway design standard and include in mine design guidelines. OFI-141: Review, update, and apply the Tarkwa Traffic Management Plan. BI-MDV.64.01 Road design guidelines specify walkway designs considering vehicle sight lines

Walkways are designed, constructed, and maintained to site standards.

Walkway design and construction follows site design requirements for protecting walkways near vehicle travel paths. These may include using:

  • Windrows and bunds
  • Physical barriers
  • Pedestrian crossings
  • Under or over passes
  • Delineation of no-go and danger zones for pedestrians etc.

Vehicle sightlines and other features such as lighting and proximity alarms are considered when designing and constructing walkways.

OFI-141 Review, update, and apply the Tarkwa Traffic Management Plan

GHG Tarkwa Traffic Management Plan, Mining Operations Procedure, TGM 1.10.54 WI was first approved for use on the 01-03-07. It is still current but has not been reviewed and updated since initial publication. It is a comprehensive document that confirms a range of site design and operating requirements that reflect good mine design and operating practice at Tarkwa.

However, during the Tarkwa 2024 Vehicle Interaction Control Effectiveness (VICE) review, workshop participants identified misalignments between this key reference document and operational practice and conditions. These include:

  • Road and ramp conditions – construction and maintenance
  • Non-conforming intersections and circles (roundabout) design and construction  
  • Limited availability and use of radios for general pit communications
  • Unclear Positive communications e.g. passing, and approaching mobile equipment
  • Obscured or missing Traffic Signage
  • Lack of infrastructure and signage to support management of pedestrians 
  • Parking practices not aligned with documented requirements for physical segregation from heavy vehicles

These issues were confirmed by supporting consultants during mine tours and interviews.

Consider a review of the Tarkwa Traffic Management plan in conjunction with the development of Gold Fields Minimum Standards for Vehicle interaction controls. At a minimum the review should revisit and update minimum requirements for:

  • Intersection design – bench mark against industry developments since 2007 including defaults to T intersections where possible
  • Simplifying intersection design and construction to fully leverage upgrades and to support successful further deployment of CAS technology
  • Road and ramp maintenance
  • Positive communications protocols and practices

OFI-126 Develop a walkway design standard and include in mine design guidelines.

The workshop participants were not aware of any formal specifications around pedestrian walkway designs and construction e.g. for go lines, around workshops.

This lack of a site design specification means that there is no consistency in how walkways are created and maintained on site.

Benchmark good practice at Gold Fields. Develop a Tarkwa mine walkway standard on the site design guidelines.

Walkways are constructed and maintained to meet site requirements.

Site design requirements are referenced before any walkway modifications are made e.g. new mobile equipment, facility use change etc.

Walkway commissioning and handover records confirming that ‘as built’ meets design requirements

Housekeeping and facilities inspection records.

Maintenance records.

CFM-CRA.03.20 Personnel do not manage heavy vehicle blind spots CFM-LDA.42.01 Reducing vehicle interactions through segregation is inadequately considered in mine design and work planning CFM-LDV.44.08 Blind spots on heavy vehicles are not considered in workplace layout
OFI-152: Review the design and application of positive communication processes at site. BI-MDV.66.05 Positive communication protocol for passing or moving close to a vehicle

Passing of vehicles in operational areas is clear, applied and requires vehicle identification and positive communications.

There are site standards, processes, procedures, and work instructions, that detail communications requirements when passing vehicles. At a minimum these cover:

  • Where and when passing is permitted
  • Radio (or other communications) call up protocols
  • Mobile equipment identification
  • Confirming that communication has been received

Training and Assessment in requirements for Positive Communications for passing a vehicle are included and reinforced in multiple training and awareness modules e.g. operator training and area inductions.

Requirements are routinely reinforced and communicated at shift briefings covering:

  • Active haul circuits and work areas.
  • Information on where passing is permitted.
  • Communications requirements.

Gold Fields Ghana-Tarkwa Mine Light Vehicle Driver Presentation – Slide 30 – Always ensure there is some contact between you and the person driving the vehicle you want to overtake…

OFI-152 Review the design and application of positive communication processes at site

Workshop participants discussed the application of positive communication processes to identify vehicles and confirm permissions when entering active haul circuits, work areas, and when passing.

Consultant Comment: workshop participants comprehensively reviewed the industry good practice references and made comparisons with Tarkwa mining practices and circumstances. Notable discussion points and differences include:

  • Tarkwa mine operates as a typical large long-term metalliferous open cut mine
  • Positive communication radio protocols are not routinely applied
  • Communications using horns to notify of movements is undertaken
  • Pedestrians are routinely in the work zone at Tarkwa e.g. leading hands and geologists
  • Load and Haul operations are congested with diggers often working in close proximity
  • Drill and Blast operations are routinely alongside Load and Haul operations
  • Multiple workgroups access operational areas using light vehicles that park close to the dig areas
  • Truck movements are managed through the Fleet Management System including truck approaching the digger
  • The two contracting groups use different radio channels while sharing some haul roads
  • Personnel in light vehicles use hand held radios for communication when the are in the pit
  • Personnel in light vehicles can access active mining areas without having a radio
  • Vehicle identification and location is more challenging at night

Safe and productive mining operations are delivered when personnel operating vehicles remain alert and situationally aware and there is a coordinated and consistent approach to manage interactions. Surface mining operations typically deliver these outcomes using a combination of approaches that include a disciplined positive communications approach.

Review Tarkwa site standards, expectations, and practices for positive communication to manage vehicle interactions. Consider benchmarking with other Gold Fields surface operations to confirm minimum standards. Involve Business Partners in the review.

Consultant CommentPositive communication protocols and requirements normally are more formal giving an example like “Light Vehicle 45 to Haul Truck 22 can I pass on your right hand side –> Haul Truck 22 to Light Vehicle 45 – yes, you are Ok to pass –> Light Vehicle 45 to Haul Truck 22 thank you I have now passed and am out of your area”

Training system records confirm currency of skills.

Supervisors and peers monitor vehicle operator radio calls and actions.

Training records confirm the currency of vehicle operator understanding of communication requirements.

Specified review period to retain competencies are stated and tracked.

CFM-CPA.11.01 Equipment operator or pedestrian mistake in estimating clearance distance CFM-MPA.66.01 Incorrect communication protocol
OFI-149: Review the holding and availability of no-entry signage BI-MPA.66.11 Expected routes by vehicle type are effectively communicated

All vehicle operators are aware of the routes that they are expected to travel on based on the vehicle type that they are operating e.g. segregated routes for light vehicles.

There are multiple communication processes that provide expected route information to vehicle operators including:

  • Start of shift briefings
  • Start of work roster traffic updates
  • Maps and plans prepared (by surveyors or engineers) of the road network
  • Despatcher or supervisor advice
  • Scheduling software
  • Road signs

GHG Tarkwa Traffic Management Plan, Mining Operations Procedure, TGM 1.10.54 WI as approved for use 01-03-07

6.1.6. Traffic Signage Road signs are located on all roads throughout the site. They shall be obeyed at all times and apply to light and heavy vehicle drivers. Sufficient warning signs need to indicate potential dangers. Signs shall be kept clean and well-maintained so that they are always visible. No vehicle is to proceed beyond a no-entry sign or barricade unless the specific authorization of a supervisor has been obtained.

Ongoing briefings and checks that vehicle operators understand the road network and how they are expected to operate i.e. where they are and the direction that are to travel.

OFI-149 Review the holding and availability of no-entry signage.

Workshop participants discussed and identified situations where the unavailability of no-entry or restricted access signs have resulted in mobile equipment entering areas with compromised conditions, causing unnecessary vehicle interactions. The limited supply of signage is reported as being frequent.

Review the site processes for holding and efficiently deploying no-entry and restricted access signs. Confirm that there are enough signs available in accessible locations for use as required.

Supervisor and despatch oversight.

Supervisors and peers monitor vehicle operator performance.

By exception hazard reporting and incident investigation.

CFM-CPA.10.20 Operators of heavy and light vehicles (or pedestrians) fail to follow the designated travel path CFM-CPA.11.05 Operator does not drive on available segregated roads CFM-MPA.65.04 Light vehicle remains in heavy vehicle blind spot due to intersection approach speeds CFM-SPA.81.07 Inadequate implementation of site traffic management plan
OFI-174: Review linking VIMS overload capability to dispatch OFI-156: Review site towing practices. OFI-100: OFI-100 Review site processes for managing non-standard loads. BI-MPA.76 Safe and Productive Movement of Loads

Site load movements are well planned, and hazards are identified and managed.

There are site processes in place for planning and managing materials and equipment load movements covering:

Load movements

  • Identifying and managing complex or heavy load requirements (including downward forces (excavators and loaders))
  • Equipment selection for loading and unloading – confirming the load is within the rated capacity
  • Transport equipment selection – confirming the load is within the rated capacity and appropriate for the planned transport route
  • Load restraints
  • Transport routes consider interactions with other workgroups including travel speeds
  • Unloading locations and tip points are level, stable, and suited to the vehicle and load being unloaded or tipped
  • Notifications and warning e.g. to operations
  • Barriers between the load and personnel in the transport vehicle
  • As required off-site transport permits

Hazardous materials transport

  • Flammable liquids or explosives are transported in rated and approved vehicles
  • Site notification, communication, and warnings are deployed

SAFE LOADING, TRANSPORTATION AND UNLOADING OF VEHICLES, Ver 6 2/1/23, Ref TGM 2.10.013 WI – Points cover safe loading, load distribution, load size and shape, and vehicle operation

OFI-100 Review site processes for managing non-standard loads.

Workshop participants discussed site processes and practices for the safe movement of non-standard loads. They identified gaps in how operators are informed and the application of required controls for managing non-standard loads.

Review site documentation for movement of loads and associated training modules and confirm that control advice is adequate e.g. maintaining load stability for wet bulk loads, load placement, route planning, use of escorts, the role of spotters when reversing etc.

Personnel apply site processes to plan and execute safe and productive load movements.

Personnel involved in the movement of loads understand their accountabilities and are authorised to apply site processes for:

  • Identifying load weights
  • Equipment required for loading and unloading
  • Equipment required for transporting
  • Determining transport route constraints
  • Documentation, notification, communication, and warning
  • Identifying and managing other hazards

OFI-174 Review linking VIMS overload capability to dispatch

Failing to gather, transfer and act on information about loads being carried by haul trucks can result in equipment damage, vehicle over-speeds, and unwanted vehicle interactions e.g. through spillage, mobile equipment breakdown etc.

Workshop participants identified that the Tarkwa Mine vehicle information management system (VIMS) has the capability to inform maintainers of overload conditions but this system is not yet linked to the dispatch system.

Consider linking VIMS to dispatch so that overloading situations and trends can be monitored and notified to effectively manage overloading.

OFI-156 Review site towing practices.

Workshop participants advised that there have been incidents when towing broken down equipment from the pit.

Inadequate towing practices can result in equipment under tow run aways and uncontrolled interactions on the road network.

Review site towing practices, confirm that both business partners have approaches that meet site standards.

Load movement plans are documented and logged.

By exception equipment damage and incident investigation findings.

Hazardous material movement audits.

Transport equipment maintenance records e.g. barriers remain in place

CFM-EPV.26.10 Routine or occasional overloading of vehicles CFM-EPV.39.42 Vehicles are operated outside specified tyre conditions CFM-ERA.39.20 Overload warning system fails is incorrect or absent CFM-LPV.41.20 Loading requirements for vehicles inadequately considered in mine design, equipment selection and work planning CFM-SDV.81.20 Inadequate mine traffic management plan (specification) CFM-EPA.25.20 Load shape, or restraints or load securing devices fail causing an incident
OFI-151: Review site processes and confirm that they are adequate to support required radio communications. BI-MPV.64.01 Pedestrian working in operational area communication and operating protocols

There is an effective and applied communication protocol for managing interactions between pedestrians and mobile equipment.

Sites have consistent, defined, and measurable processes for managing interactions between pedestrians and mobile equipment. These define communication requirements based on the situation including:

  • Approaching and accessing heavy vehicles
  • Working independently in an area where vehicles are operating
  • Working alongside a vehicle in the same workgroup
  • How to move past a vehicle when working underground or in a constricted space e.g. if pedestrians cannot move to a position of safety in a roadway, the vehicle must stop, the operator must acknowledge the pedestrian presence and allow the pedestrians to walk past the vehicle before continuing

They also confirm what communication equipment and signage is required for different situations on site, for example

  • When personnel are working on the ground at least one member of the work party must be in possession of a two way radio or equivalent.
  • Standard radio (or other communications) call-up protocols are followed.
  • Signage alerting vehicle operators to the presence of work in an area.
  • Cap lamp signals when working underground.
  • Collision Avoidance System handshake or acknowledgements etc.

Training and assessment in requirements for working in operational areas as a pedestrian.

Requirements are reinforced in area inductions and periodically at start of shift or similar briefings.

Planners and supervisors identify workgroup interactions and confirm required communication before entry and during work.

Permanent or mobile signs provide call up information

OFI-151 Review site processes and confirm that they are adequate to support required radio communications.

Workshop participants discussed site processes and schedules for the routine checking of radios in mobile equipment. This includes prestart checks, defect reporting, and scheduled maintenance of radios and site infrastructure. It also incudes confirming minimum requirements for radios in heavy mobile equipment, service vehicles, light vehicles and for pedestrians.

Surface mining operations typically deliver safe and productive outcomes using radios to support disciplined positive communications to manage interactions in working areas. Workshop participants report that radio faults do occur and that pre start and routine schedules for checking radios and communication infrastructure are inconsistent.

Review site processes and confirm that they are adequate to support required radio communications. Involve Business Partners in the review.

Training records confirm that relevant personnel are competent e.g. maintainers, service personnel operators, supervisors.

Supervisors monitor performance.

Records of start of shift or similar awareness briefings.

Collision avoidance system logs and reports on equipment and pedestrian interfaces.

By exception hazard and incident reporting.

CFM-MPA.66.01 Incorrect communication protocol CFM-MPA.72.03 Mobile equipment operator or pedestrian does not notify when entering a controlled work area CFM-MPV.63.02 Light vehicles stop or park in heavy vehicle blind spots
OFI-152: Review the design and application of positive communication processes at site. BI-MPV.65.12 Vehicle entering a work area positive communications protocol

All personnel operating vehicles remain alert and situationally aware when working in congested areas.

There are site standards, processes, procedures, and work instructions, that detail vehicle entry requirements to congested work areas e.g. when loading and dumping, or when accessing workshop areas

At a minimum, these detail:

  • Work area delineation (where to stop and queue etc.)
  • Radio (or other communications) call up protocols
  • Identification
  • Confirming that communication has been received
  • Following signs and directions.

Training and Assessment in requirements for Positive Communications for Entering a Work Area requirements are included and reinforced in multiple training and awareness modules e.g. operator training and area inductions.

Requirements are routinely reinforced and communicated at shift briefings covering:

  • Active haul circuits and work areas
  • Information on the area owners and communications before entry.

Permanent or mobile signs are provided with call up requirements.

OFI-152 Review the design and application of positive communication processes at site

Workshop participants discussed the application of positive communication processes to identify vehicles and confirm permissions when entering active haul circuits, work areas, and when passing.

Consultant Comment: workshop participants comprehensively reviewed the industry good practice references and made comparisons with Tarkwa mining practices and circumstances. Notable discussion points and differences include:

  • Tarkwa mine operates as a typical large long-term metalliferous open cut mine
  • Positive communication radio protocols are not routinely applied
  • Communications using horns to notify of movements is undertaken
  • Pedestrians are routinely in the work zone at Tarkwa e.g. leading hands and geologists
  • Load and Haul operations are congested with diggers often working in close proximity
  • Drill and Blast operations are routinely alongside Load and Haul operations
  • Multiple workgroups access operational areas using light vehicles that park close to the dig areas
  • Truck movements are managed through the Fleet Management System including truck approaching the digger
  • The two contracting groups use different radio channels while sharing some haul roads
  • Personnel in light vehicles use hand held radios for communication when the are in the pit
  • Personnel in light vehicles can access active mining areas without having a radio
  • Vehicle identification and location is more challenging at night

Safe and productive mining operations are delivered when personnel operating vehicles remain alert and situationally aware and there is a coordinated and consistent approach to manage interactions. Surface mining operations typically deliver these outcomes using a combination of approaches that include a disciplined positive communications approach.

Review Tarkwa site standards, expectations, and practices for positive communication to manage vehicle interactions. Consider benchmarking with other Gold Fields surface operations to confirm minimum standards. Involve Business Partners in the review.

  1. Training records confirm the currency of vehicle operator understanding of communication requirements.
  2. Specified review period to retain competencies are stated and tracked.
  3. Supervisors monitor vehicle operator performance.
  4. Supervisors and peers monitor vehicle operator radio calls and actions
CFM-MPA.66.01 Incorrect communication protocol CFM-MPA.72.03 Mobile equipment operator or pedestrian does not notify when entering a controlled work area CFM-MPV.63.02 Light vehicles stop or park in heavy vehicle blind spots
OFI-141: Review, update, and apply the Tarkwa Traffic Management Plan. BI-MPV.66.01 Road design guidelines specify minimum requirements for delineation

The design and installation of delineators assists mobile equipment operators to accurately estimate separation distances.

Road designs and construction requirements include standards for the accurate spacing of delineators along the road network.

Spacing guideposts are placed at distances relative to the distance required to be maintained between mobile vehicles.

Site design requirements specific the use of reflector colours e.g. Use red reflectors on the left, white on the right.

OFI-141 Review, update, and apply the Tarkwa Traffic Management Plan

GHG Tarkwa Traffic Management Plan, Mining Operations Procedure, TGM 1.10.54 WI was first approved for use on the 01-03-07. It is still current but has not been reviewed and updated since initial publication. It is a comprehensive document that confirms a range of site design and operating requirements that reflect good mine design and operating practice at Tarkwa.

However, during the Tarkwa 2024 Vehicle Interaction Control Effectiveness (VICE) review, workshop participants identified misalignments between this key reference document and operational practice and conditions. These include:

  • Road and ramp conditions – construction and maintenance
  • Non-conforming intersections and circles (roundabout) design and construction 
  • Limited availability and use of radios for general pit communications
  • Unclear Positive communications e.g. passing, and approaching mobile equipment
  • Obscured or missing Traffic Signage
  • Lack of infrastructure and signage to support management of pedestrians
  • Parking practices not aligned with documented requirements for physical segregation from heavy vehicles

These issues were confirmed by supporting consultants during mine tours and interviews.

Consider a review of the Tarkwa Traffic Management plan in conjunction with the development of Gold Fields Minimum Standards for Vehicle interaction controls. At a minimum the review should revisit and update minimum requirements for:

  • Intersection design – bench mark against industry developments since 2007 including defaults to T intersections where possible
  • Simplifying intersection design and construction to fully leverage upgrades and to support successful further deployment of CAS technology
  • Road and ramp maintenance
  • Positive communications protocols and practices

Road construction crews place and maintain delineators at required distances.

Commissioning and handover records confirming that ‘as built’ meets design requirements

Supervisor inspection records.

CFM-CPA.11.01 Equipment operator or pedestrian mistake in estimating clearance distance
OFI-154: Review refuelling practices and processes on site. BI-MPV.68 Refuelling Practices

Refuelling of mobile equipment is productive and safe.

Operating sites have refuelling procedures that confirm requirements for:

  • Mobile equipment refuelling system specifications
  • Operation of fuel transfer systems
  • Refuelling of vehicles, equipment and fixed plant – management of interactions between service vehicles and operating vehicles
  • Housekeeping in refuelling bays and requirements for inspection of fire suppression systems and fire extinguishers
  • Emergency procedures including spill response
  • Replacement or changing of fuel cells or storage tanks
  • For underground operations – refuelling outside refuelling bays

Training and assessment for personnel responsible for refuelling.

Training and assessment for mobile equipment operators.

Site refuelling infrastructure and equipment meets site standards.

Housekeeping Inspections.

Training system currency of refueller skills.

Audits of site refuelling infrastructure and equipment.

Approved and in-date emergency response plans and periodic exercises.

OFI-154 Review refuelling practices and processes on site

Workshop participants identified situations where mobile equipment refuelling is not happening at designated locations, spotters are not used, and communication between operators and service personnel is inadequate.

Unexpected and unintended movement of vehicles during refuelling has resulted in incidents at site and across the mining industry including fires, and vehicle collisions.

Review site refuelling requirements and confirm that they are being applied to deliver safe and effective refuelling operations.

CFM-MPA.63.01 Operator does not meet site requirements when parking CFM-MPV.63.02 Light vehicles stop or park in heavy vehicle blind spots CFM-SDA.90 Emergency or incident response is inadequate
OFI-130: Leverage technology to improve vehicle interaction monitoring by category and location. OFI-114: Improve implementation of consistent fleet ID across site systems. OFI-115: Improve quality of data networks on site. BI-MRA.71.05 Proximity detection system data send

Installed proximity detection systems are fully leveraged to assist equipment operators, pedestrians, supervisors, and site management improve operational performance.

Installed proximity detection systems are fully leveraged to assist equipment operators, pedestrians, supervisors, and site management improve operational performance.

When proximity detection systems are fitted, data is from vehicles, pedestrians, and infrastructure is sent to:

  • Support and monitor operator performance, including making interventions.
  • Alert and update supervisors on operator performance.
  • Analyse and improve operational processes.

Data and associated information are managed following site privacy and record keeping standard.

Reports and analysis may include:

  • Inputs to operator score cards.
  • Heat maps that check planning assumptions.
  • Checks on operating environment layouts.

OFI-114 Improve implementation of consistent fleet ID across site systems.

The Tarkwa VICE review confirmed that fleet identification for vehicle types is not always available and may be inconsistent.

Without adequate knowledge of vehicle types then unwanted proximity alarms may be generated.

Further define the issues and work with the technology provider to resolve how fleet IDs are loaded and tracked inside and across multiple systems. Establish agreed points of truth and checks.

Reports confirm proximity data is being captured, transmitted, aggregated, analysed and applied improve vehicle interaction performance for:

  • Individuals
  • Supervisors
  • Operating sites

Confirmation that site privacy management standards are being maintained e.g. through audits or reviews.

Performance metrics e.g. operator score cards, supervisor interactions, construction and maintenance of the operating environment meets design standards.

OFI-130 Leverage technology to improve vehicle interaction monitoring by category and location.

As with every other large mining operation, there are thousands of vehicle interactions each day at Tarkwa mine. Without leveraging technology, analysing interaction patterns at scale is not possible.

Current approaches to assess and monitor performance are based on observations by individuals.

Explore if CAS technology, or technology combinations such as CAS and Dispatch can be used to identify different subsets of vehicle interactions e.g. heavy vehicle to light vehicle, pedestrian interactions, service truck, maintainer vehicles to operations equipment etc. If it can, consider the value of developing performance measures for different categories of vehicle interaction. Include location in the analysis.

OFI-115 Improve quality of data networks on site.

Workshop participants noted that there are frequent disconnects due to poor signal and network challenges around the Tarkwa operations.

With loss of signal the ability for dispatch to contact and advise operators of responses to alarm states is impaired.

Improve quality and reliability of site data networks to support timely and reliable alarm responses.

CFM-CRA.10.30 Proximity alarms do not assist operator CFM-CRA.11.21 No action taken on over speed alarm CFM-CRA.11.22 Operator ignores or bypasses alarm or safety device CFM-CTA.11.34 Incorrect action taken on proximity alarm CFM-MDV.71.01 Proximity alarms do not perform to specification (false negatives and false positives)
OFI-158: Review work area access processes. OFI-134: Consider mandating fitted radios for all mine vehicles. BI-MRA.72.01 Controlled Access to Operational Areas

Site access infrastructure controls are in place and permissions to enter operational areas are clear, applied, and well managed.

There are site standards, processes, procedures, work instructions, and specification to manage site and area access for personnel (including third parties), animals, and mobile equipment. These cover:

  1. Site operational areas, other locations, and circumstances where access controls are required e.g. blasting, autonomous mining, and other high consequence activities etc.
  2. How these areas are delineated and identified e.g. sign posts, site maps, geo fencing, (boom) gates, barriers etc
  3. Who is accountable for controlling access e.g. security or sentries for blasting
  4. Specifications for any required physical infrastructure e.g. fences, permanent barriers, temporary barriers, light curtain interlocks, security gates, turnstiles etc.
  5. Minimum standards for authorised access to a controlled area e.g. vehicle marking and lights, PPE, training and awareness, permitted persons (inspectors, etc.), notification requirements (in and out) etc.
  6. How access standards are monitored e.g. regular inspections to confirm boundary, barrier and delineation performance integrity.
  7. How access permissions are monitored e.g. access system reports
  8. The process for dealing with unauthorised access by direct and indirect employees and by third-parties or animals.

GHG Tarkwa Traffic Management Plan, Mining Operations Procedure, TGM 1.10.54 WI as approved for use 01-03-07

6.1.4. Pedestrian Segregation

The greatest risk to pedestrians is from vehicles and mobile equipment. Pedestrian activity within the operational areas shall be restricted wherever possible, particularly in hours of darkness. For certain operations, “no entry” zones shall be identified and clearly marked by signs, fencing, cones, etc. Employees shall not enter active operational areas as pedestrians unless authorized to do so.

Where practicable, pedestrian routes or zones shall be established and designated with suitable signs, barriers, road markings, etc., particularly where equipment is operating or maneuvering. Such areas would be equipment and vehicle parking areas, around static equipment and buildings, particularly workshops.

6.1.4.1. Segregation between Heavy Equipment and Light Vehicles

Segregation shall be observed at the following locations:

    • At the digging floor in-pit, light vehicle parking shall be demarcated with cones/delineators. Where this is not possible, light vehicles shall park close to light equipment locations at digging floors.
    • At the Stockpiles/ Waste Dump, light vehicles shall park far away from active dumping locations or next to light equipment locations.
    • At the drilling site, designated light vehicle locations shall be established and used appropriately.
    • Parking locations (such as the Go-Line, HME Workshop, TSF), shall be so designed to prevent both light vehicles and heavy equipment parking together. Designated areas for heavy equipment must be separate from light vehicles.
    • The Clear 20-Rule shall be observed at all times in the mining area for equipment/equipment, equipment/light vehicle and equipment/human interactions.

OFI-134 Consider mandating fitted radios for all mine vehicles.

Workshop participants discussed situations where vehicles are routinely entering the mine without functioning radios. Many personnel operating light vehicles in the pit use hand held radios.

Inability to contact other vehicles, or be contacted, can lead to misunderstandings and cause vehicle collisions.

Confirm the site equipment specifications requirements for fitted and functioning radios. Communicate site requirements and consider having radio checks when buggy whips are fitted to light vehicles. Reduce the reliance on portable radios e.g. to pedestrians and escorts. Consider mandating fitted radios on all mine vehicles.

  1. Training and assessment in applying relevant site access requirements are included and reinforced in multiple training and awareness modules for direct and indirect employees.
  2. Fences and gates are included in site maintenance strategies and are regularly inspected and maintained
  3. Security patrols confirm integrity of boundary and alert site personnel if entry is occurring or has occurred.
  4. Sentries provide warning to approaching vehicles and notify workers inside perimeter if an entry is required to occur.
  5. Security patrols, sentries and others complete inspection forms to confirm site requirements are being met.
  6. Barriers to high consequence areas are installed and maintained to meet requirements.
  7. Work area barriers are regularly inspected and maintained.

OFI-158 Review work area access processes.

Workshop participants discussed and identified situations when operational area access controls have not been applied. This includes missing signs and failures to communicate.

This has resulted in incidents where unexpected vehicles enter working areas.

Review site processes for controlling access to operational areas including work area inspections that confirm signs are in place.

  1. Training and induction records are created and controlled in site information management systems.
  2. Inspection records are created and reviewed by more senior personnel on site.
  3. Access logs and reports are generated and maintained.
  4. By exception reporting and investigation of access barrier failures.
  5. Audits of high consequence site activities e.g. blasting, autonomous mining etc.
CFM-MPA.72.01 Access control infrastructure is inadequate
OFI-156: Review site towing practices. OFI-155: Review processes for managing equipment breakdowns and field repairs. OFI-137: Review understanding for applying processes when there are significant changes in operating conditions or circumstances. OFI-150: Update emergency response requirements across all roles. BI-MTV.65.01 Ceasing Operations Procedure – significant interaction threats

Significant interaction threats will initiate the site cease operations process and plans.

There is a process and threshold for ceasing mobile equipment operations at site because of significant interaction threats caused by:

  • Unauthorised access (pedestrian, wildlife, or vehicles).
  • Non reversible equipment moving on a roadway (e.g. into underground or down a narrow ramp).
  • Breakdowns.
  • Emergency response e.g. fires, compromised tyres etc.
  • Escorted vehicles.
  • Other relevant site circumstances.

Significant interaction threat awareness, training and assessment for vehicle operators, supervisors and management covering:

  • Anticipating and identifying significant interaction threats
  • Notifying
  • Expect actions e.g. using Trigger Action response Plan (TARP) thresholds and actions
  • Worker observations of potentially dangerous situations

Real world examples are used for training, induction, and start of shift briefings. Examples include an explanation of how interaction threats develop

OFI-150 Update emergency response requirements across all roles.

Workshop participants discussed site emergency response processes and identified situations where personnel have not acted as expected based on emergency response process design and training. Issues discussed include continuing to operate during an emergency and entering  the emergency locations.

Unexpected vehicle or pedestrian movements while responding to an emergency can compromise the response.

Review operator understanding of their expected actions for a range of typical site emergencies e.g. fire, tyre incident, vehicle incident, third-part on site etc. Include site response processes including ceasing operations and not entering emergency locations. Review current training and awareness materials and refresher schedules and update as required.

Training and assessment records.

Approved and in-date TARPs or equivalent.

By exception post incident reviews.

OFI-137 Review understanding for applying processes when there are significant changes in operating conditions or circumstances.

Workshop participants confirmed that there are site processes in place for dealing with changes in operating conditions and circumstances e.g. third parties on mine site.

However, they questioned knowledge and awareness levels on the application of these processes, including triggers for their implementation and key actions that follow.

Review understanding and capability of operators and other in-field personnel e.g. drillers and field maintenance to notify and act on changes in operating conditions and circumstances.

CFM-MPA.67.10 Operations continue when there are significant interaction threats CFM-MPA.72.02 Operational access control (pedestrian and vehicle) is inadequate CFM-SDV.81.20 Inadequate mine traffic management plan (specification) CFM-SPA.81.07 Inadequate implementation of site traffic management plan CFM-LPA.56.01 Operations continue when operating environment is significantly compromised
OFI-150: Update emergency response requirements across all roles. BI-SDA.89 Emergency Preparedness

There should be a formal approach to emergency preparedness on site. It should include local response, emergency response through to crisis management.

There should be a formal approach to emergency preparedness on site. It should include local response, emergency response through to crisis management and may include formal liaison with external agencies.

Specific response plans for foreseeable site emergencies e.g. traumatic injuries, entrapment, rescue from heights, fires, spills etc. are:

  • Prepared
  • Resourced (equipment and personnel)
  • Practiced and tested
  • Reviewed and improved
  • Maintained

At a minimum, site emergency response capability requires that:

  • All personnel at site know how to notify a site emergency
  • All employees (direct and indirect) understand first-response actions after notification for fires, injuries, spills, and other foreseeable incidents
  • There are trained and competent emergency responders, supported with appropriate equipment, and who may be supported by external agencies
  • There are processes to notify and carry out emergency evacuations

A senior site position is accountable for site emergency and crisis management response and recovery capability.

Emergency response plans have a review cycle and are also reviewed after incidents. Emergency response information is available in the workplace in a format that is audience appropriate.

Visitor inductions include emergency notification and evacuation requirements.

Employees (direct and indirect) are trained in:

  • Emergency notification
  • First response – first aid, fire fighting etc.
  • Evacuation
  • Where relevant – the use of self-rescuers and refuge chambers

Emergency responders:

  • Are trained and competent to manage foreseeable site emergencies
  • Have access to up to date plans, support materials, and navigation aids
  • Have access to adequate equipment to manage foreseeable emergencies

OFI-150 Update emergency response requirements across all roles.

Workshop participants discussed site emergency response processes and identified situations where personnel have not acted as expected based on emergency response process design and training. Issues discussed include continuing to operate during an emergency and entering  the emergency locations.

Unexpected vehicle or pedestrian movements while responding to an emergency can compromise the response.

Review operator understanding of their expected actions for a range of typical site emergencies e.g. fire, tyre incident, vehicle incident, third-part on site etc. Include site response processes including ceasing operations and not entering emergency locations. Review current training and awareness materials and refresher schedules and update as required.

Capability reports for Emergency Responders, Employees, and Visitors.

Reviews of emergency response drills.

Maintenance reports on the status of site emergency response equipment.

By exception incident reviews.

CFM-SDA.90 Emergency or incident response is inadequate CFM-SPA.90 Emergency response is significantly delayed
OFI-172: Review Site Capability to manage foreseeable Vehicle Related Emergencies. OFI-150: Update emergency response requirements across all roles. BI-SDA.89.01 Vehicle Incident Emergency Preparedness

The site has a formal approach for emergency preparedness that includes vehicle incidents.

There should be a formal approach to emergency preparedness on site that includes vehicle incidents. Planning should consider multiple scenarios and locations and the corresponding capabilities for local response, site emergency response, and assistance from external agencies.

Vehicle incident scenarios include:

  • Pedestrians struck by vehicles
  • Single vehicle crashes
  • Crashes between multiple vehicles
  • Vehicle roll overs
  • Equipment fires
  • Emergency escapes from heights
  • Entrapment
  • Engulfment e.g. stockpile dozer falls into a void, vehicle in water
  • Environmental incidents – spills of material being carried and releases of fuels and lubricants

Consider all locations taking into account potential response times, the capability of local and site emergency responders, and the availability of recovery equipment and other resources.

A senior site position is accountable for site emergency and crisis management response and recovery capability.

Emergency response plans have a review cycle and are also reviewed after incidents. Emergency response information is available in the workplace in a format that is audience appropriate.

OFI-172 Review Site Capability to manage foreseeable Vehicle Related Emergencies.

There is an established emergency response capability at Tarkwa mine to cover medical, fire, and other emergencies. There is also a hospital on the mining estate.

Workshop participants discussed how often specific vehicle incident emergency drills were carried out covering; light vehicle roll over, entrapment, crash, rescue from HME, mobile equipment fires, etc.

Confirm that site and local community emergency response planning and capability for foreseeable vehicle incidents is adequate.

OFI-150 Update emergency response requirements across all roles.

Workshop participants discussed site emergency response processes and identified situations where personnel have not acted as expected based on emergency response process design and training. Issues discussed include continuing to operate during an emergency and entering  the emergency locations.

Unexpected vehicle or pedestrian movements while responding to an emergency can compromise the response.

Review operator understanding of their expected actions for a range of typical site emergencies e.g. fire, tyre incident, vehicle incident, third-part on site etc. Include site response processes including ceasing operations and not entering emergency locations. Review current training and awareness materials and refresher schedules and update as required.

Reviews of vehicle related emergency response drills.

By exception incident reviews.

CFM-SDA.90 Emergency or incident response is inadequate CFM-SPA.90 Emergency response is significantly delayed
OFI-101: Resolve document reference duplicates for different GHG operations. BI-SDA.91 Document and Information Management System is fit for purpose

There is an effective document and information management system in place that meets requirements and prevents sensitive information being shared inappropriately.

  • Company information is documented, applied by operating sites projects, and continually improved.
  • Management System components are prepared in a style appropriate for their intended audience.
  • Storage duration and access restrictions are specified for different information and document types.
  • Provision of information to required onsite, company, and third parties is enabled by the system.

OFI-101 Resolve document reference duplicates for different GHG operations

Consultant Comment: During ‘work as documented’ mapping for Tarkwa, documents for Damang were also provided. Some of these had duplicate or similar titles.

If these duplicate or similar documents are accessible by decision makers at both sites then choosing the incorrect document could result in site inappropriate design or planning decisions.

Review how the document information protocol applies to documents across all GHG operations. Identify situations where common standards apply and where site specific approaches apply and update document management processes.

  • Relevant management System components are available and used at an operational level.
  • Information from operational and technical teams is stored in line with site requirements
  • Documents and information are shared with site, company workers, and third parties in line with requirements.
  • Document management system effectiveness and efficiencies are periodically audited with improvement opportunities actioned as appropriate.
  • Leaders routinely check that resources are available and applied at a task level during task observations, inspections, and other interactions.
CFM-CRA.11.21 No action taken on over speed alarm CFM-ERV.33.20 Compromised vehicle cabin no longer meets OEM or site specific specifications CFM-SDA.83 Organisation Work Scheduling and Planning is inadequate CFM-STA-91 Regulator prosecution
OFI-136: Improve Communication of Incident Learnings BI-SPA.86 Hazard and incident reporting and response processes are in place, effective, and well used.

The site has an effective and well used hazard and incident response and reporting process which avoids placing workers at risk of injury.

There is an effective site hazard and incident reporting processes that:

  • Can be applied by all personnel, including contractors and visitors.
  • Aligns with the site emergency response and notification process (such as provision of first aid).
  • Allows personnel to efficiently report and resolve work area problems including allowances for not working if there is a threat to health or safety, or a potential to cause environmental or community harm.
  • Captures information for investigation, reporting and trend analysis.

Personnel on site:

  • Are trained in site processes for incident and hazard identification, reporting and control. The training includes guidance on when to cease work and also when to preserve an incident scene.
  • Identify any hazard present is reacted to by removing or isolating the hazard (ceasing work as required)
  • Report any incident which occurs.

OFI-136 Improve Communication of Incident Learnings

Tarkwa Mine has a comprehensive incident and hazard reporting process supported by the INX platform.

While comprehensive information is captured and recorded in the INX platform, workshop participants discussed situations where the post incident learnings have not been communicated well to the general workforce.

Review incident learnings communication format. Consider key information required by filed personnel and improve the process, if required.

  • Reviews are made on the quantity and quality of hazard and incident reports.
  • Tracking of corrective actions.
  • Time to complete incident investigations is tracked and reported on.
  • Timing and quality of feedback to personnel who reported hazards or incident is tracked and reported on to senior personnel on and off site.
CFM-CPA.11.21 Operator fails to see signage installed to standard CFM-CRA.11.21 No action taken on over speed alarm CFM-LDV.42.02 Speed limits and over-speed management are inadequately considered in mine design and routine work planning CFM-LPA.44.05 Appropriate distances from fixed and overhead structures are not maintained CFM-LPV.54 Excessive water (Dust Control) is applied to road surface CFM-MDA.61.06 Inadequate work planning means that heavy vehicle operators approach fixed structures that are incidental to achieving operational outcomes CFM-CTA.10.90 Personnel do not alert others to presence of hazards
OFI-108: Review and Align Mining Operations Inspection and Task Observation processes. BI-SPA.87 Planned Inspections and Task Observations

Planned inspections and task observations assess and provide timely feedback about the effectiveness and efficiency of performance standards (work as documented) as they are applied in the workplace (work as done).

Planned inspections and task observations assess and provide timely feedback about the effectiveness and efficiency of performance standards (work as documented) as they are applied in the workplace (work as done).

The site processes for inspections and task observations have these elements:

  • Inspections and task observations are scheduled and assigned to site roles, and consider the work intensity and exposure of workers to harm (including checks on work environments, workers performing tasks alone or in remote locations, and work group interactions),
  • Minimum competence and experience requirements, based on inspection or task observation type, are detailed,
  • Reference to available information e.g. checklists, aide memoirs detailing expected standards and performance requirements,
  • There is process for performance reporting, identifying defects, and assigning remedial actions,
  • Outputs from multiple inspections and task observations monitored for performance drift trends. 

Task Observations provide additional information about:

  • Training effectiveness,
  • Task assignment and performance expectations,
  • Procedures and task instructions,
  • Employee engagement and contributions.

Site Planned Inspections:

  • Assess the application of methods and practices performance standards in a systematic and organised way,
  • Confirm that people have the resources required to complete their work safely and productively, in an appropriate work environment,
  • Identify and deal with potential problems and issues before losses occur,
  • Identify effects of changes,
  • Identify equipment defects,
  • Confirm the status of remedial actions.

Senior site personnel confirm that scheduled inspections and task observations match schedule and quality expectations.

Site Inspection and Task Observations processes are applied to:

  • Assess operating conditions,
  • Review work practices,
  • Confirm the status of plant and equipment status,
  • Identify effects from changes in materials and process
  • Confirm the close out of remedial actions
  • Evaluate management performance
  • Analyse the effectiveness and efficiency of workflows from approval, through planning, scheduling, resourcing, and task execution

Inspection and task Observation reports meet site performance expectations for quantity and quality.

There is a process that manages defects, non-conformances, and other performance issues identified from inspections and task observations. These are assessed and where necessary remedial actions with due by dates are assigned.

Performance reports track remedial action status.

Trend analyses reports that identify drift from expected performance.

OFI-108 Review and Align Mining Operations Inspection and Task Observation processes.

Tarkwa Mine has a mature and well designed Planned Task Observation (PTO) process that is applied across the operation.

While Task Observations on mobile equipment operations are carried out at Tarkwa, there are limits in providing timely performance feedback to the operators and collating and analyzing findings. Also, PTOs on mining operations assess both the actions of individual operators and the collected outcomes e.g. congested areas with multiple workgroups.

Consider reviewing and aligning PTO, Critical Control Verification, Senior Supervisor checks, and other mining operations inspection processes. Confirm that all processes reference relevant site standards, use consistent good performance criteria, and that feedback and corrective action tracking processes are effective.

Explore options to leverage technology data streams to assist the process e.g. through traffic interaction heat maps.

CFM-EPA.31.20 Equipment or component failure during operations e.g. brakes or steering or controlled functions CFM-EPA.33.40 Communication equipment absence, failure or poor reception CFM-EPV.27.20 Mobile Equipment does not meet standards for safe access, lighting, signage and identification markings CFM-ERA.39.21 Speedometer does not indicate actual speed CFM-ERA.40.22 Over speed warning alarm fails to operate CFM-LDV.44.08 Blind spots on heavy vehicles are not considered in workplace layout CFM-LPA.42.03 Obscured or missing signage CFM-LPV.54 Excessive water (Dust Control) is applied to road surface
OFI-161: Review the consistent application of site change management processes. OFI-103: Consider including a mobile equipment change example in MoC documentation and training. BI-SPA.88 Change and Risk Management Process

Applied and effective change management processes, incorporating comprehensive risk and control management steps, assist senior manager decision-makers to deliver safe and productive outcomes for the business.

There is a defined change and risk management process that:

  • Confirms the reason and goals
  • Engages stakeholders and communicates reasons as a business case (risk and rewards)
  • Uses good practice project management approaches to develop a plan with a schedule and outcomes.
  • Includes and references inputs from subject matter and technical experts in the project plan.
  • Where appropriate, the plan and associated work program are reviewed and formally analysed using a facilitated group process involving subject matter and technical experts, site leaders, workers, designers, suppliers, and other stakeholders.
  • Applies risk and control management processes that support the work program by identifying hazards, considering relevant loss experiences, assessing risks including critical risks and confirming their controls.
  • Gains senior manager approval to resource and execute the plan.
  • Monitors and evaluates progress to plan
  • Continues to communicate with stakeholders.
  • Adapts and adjusts to hazards and controls based on work program schedule.
  • Confirms and delivers the operating processes, procedures, equipment, infrastructure, risk and control management processes required after the change is fully implemented.
  • Recognises milestones and celebrates success.

The level of effort and rigour applied to the hazard identification, risk assessment, and application of controls during change management considers situation complexity, the range of potential outcomes, and the likelihood of a loss of one or more required operating states.

HSMP 5.3 PR TGM OPERATIONAL PROCEDURE MANAGEMENT OF CHANGE

The scope of the procedure covers changes to new product, plant, equipment, machinery, software, staffing or process that take place on the mine including changes to existing process, products or services. Scope examples include changes to roads (construction or diversion).

OFI-103 Consider including a mobile equipment change example in MoC documentation and training

Consultant Comment: The Tarkwa HSMP PR 5.3 PR Management of Change document is a comprehensive document that provides a structured approach including managing stakeholder communications. It has multiple examples of the types of change that will trigger its application.

However, the list of examples do not include changes to mobile equipment.

Consider adding a mobile equipment as a change example. Also, check the change management document reference from HSMP 1.0 MN (the current reference is TGM 9.14 PR)

Senior managers identify when thresholds for applying the change and risk management process are crossed such as:

  • New technology implementations
  • A change in work process e.g. moving from development to production, transitioning from surface to underground mining, changes in traffic flows
  • The introduction of new equipment types
  • Scale up of workforces
  • Significant workforce changes e.g. use of contractors
  • Significant operational changes in infrastructure e.g. for road network layouts
  • Opening of new operating areas
  • Significant onsite capital works
  • Regulated and periodic review triggers for existing risk analyses supporting site controls

Accountability for applying the process is assigned to a role e.g. project manager.

The level of effort and rigour applied to the hazard identification, risk assessment, and application of controls during change management considers situation complexity, the range of potential outcomes, and the likelihood of a loss of one or more required operating states.

HSMP 3.3 PR – Hazard Identification and Assessment of Risks and Opportunities details site hazard identification, risk assessment and determining controls. This document describes site processes for identifying, analysing, evaluating, managing and communicating risks and their potential safety, health and environmental impact on employees, contractors and other stakeholders. Section 3 includes accountabilities.

Gold Fields Ghana apply four types of Risk Assessment:

  1. Baseline risk assessment
  2. Issue-based risk assessment (e.g. WRAC, HAZOP, BOWTIE, etc)
  3. Task planning risk assessment
  4. Continuous Risk Assessment (Take 5 risk assessment

OFI-161 Review the consistent application of site change management processes.

Consultant Comment: Tarkwa mine has well documented and externally certified change management processes in place. However, workshop participants discussed situations where the process was not fully applied.

Making changes without input from all stakeholders can result in suboptimal implementation and introduce new risks and hazards. Examples discussed include contractor introduction of new equipment types, and making changes to the planned activities in constrained work areas (at the lowest RLs (bottom) of the pit in particular).

Review how the application of change management processes is monitored at Tarkwa.

Reports on change and risk management activities are reviewed by maintenance planners, technical services and engineering personnel.

Process change reports are reviewed by the relevant Manager.  

Changes are authorised by an accountable supervisor or manager who confirm that the change has been:

  • Assessed over a representative period and under a variety of operational conditions.  
  • Included in all relevant processes including training, maintenance, documents and future specifications.  
  • Communicated to all relevant stakeholders including the Regulator when applicable 
  • Detailed on relevant plans, process maps, schematic diagrams, documents and procedures.  
CFM-SPA.88 Inadequate management of change
OFI-103: Consider including a mobile equipment change example in MoC documentation and training. OFI-112: Apply Site Management of Change processes for new mobile equipment. BI-SPA.88.01 Site change management processes apply to the introduction of new types and models of mobile equipment

Applied and effective change management processes are in use at the operating site, and these apply to the introduction of new types and models of mobile equipment.

The introduction of new mobile equipment components, new models and new types e.g. introduction of electric battery powered equipment follow a defined change management process that:

  • Confirms the scope
  • Identifies potential impacts for mobile equipment and personnel
  • Confirms how hazards will be controlled e.g. equipment fires
  • Communicates relevant information to personnel

HSMP 5.3 PR TGM OPERATIONAL PROCEDURE MANAGEMENT OF CHANGE

The scope of the procedure covers changes to new product, plant, equipment, machinery, software, staffing or process that take place on the mine including changes to existing process, products or services.

OFI-103 Consider including a mobile equipment change example in MoC documentation and training

Consultant Comment: The Tarkwa HSMP PR 5.3 PR Management of Change document is a comprehensive document that provides a structured approach including managing stakeholder communications. It has multiple examples of the types of change that will trigger its application.

However, the list of examples do not include changes to mobile equipment.

Consider adding a mobile equipment as a change example. Also, check the change management document reference from HSMP 1.0 MN (the current reference is TGM 9.14 PR)

When senior managers confirm that change management thresholds for new equipment will be crossed, relevant parts of the process are applied to manage the introduction of the equipment e.g. for new models, different types etc.

OFI-112 Apply Site Management of Change processes for new mobile equipment.

Workshop participants discussed how site change management process are used to assist with the introduction of new types and models of mobile equipment.

New equipment introduced can have insufficient other resources such as training modules considerations in mind design and availability of maintenance resources.

Confirm thresholds for the application of site change management approaches for mobile equipment and monitor application of the process.

New equipment controls are communicated and implemented.

CFM-CPA.10.20 Operators of heavy and light vehicles (or pedestrians) fail to follow the designated travel path CFM-CRA.03.01 Operator fails to identify and act on changes in conditions: reduced visibility, road narrowing, road surface etc. CFM-EPA.31.20 Equipment or component failure during operations e.g. brakes or steering or controlled functions CFM-LDA.42.01 Reducing vehicle interactions through segregation is inadequately considered in mine design and work planning CFM-LPV.41.20 Loading requirements for vehicles inadequately considered in mine design, equipment selection and work planning CFM-LRA.44.01 Inadequate Inspection and Management of Operating Environment CFM-SPA.81.07 Inadequate implementation of site traffic management plan CFM-SPA.88 Inadequate management of change CFM-SRA.87 Inadequate monitoring that mine traffic management requirements have been implemented and are being maintained
OFI-109: Improve management of change for road and traffic flow changes OFI-120: Review how changes to traffic flows and road networks are communicated to stakeholders. BI-SPA.88.02 Site change management processes apply to changes in road networks and traffic flows

Applied and effective change management processes are used when there are changes in road networks and traffic flows.

Changes to road networks and traffic flow adjustments follow a defined change management process that:

  • Confirms the scope
  • Identifies potential impacts for mobile equipment and personnel
  • Confirms how hazards will be controlled e.g. signs, barriers, etc.
  • Communicates relevant information to personnel

HSMP 5.3 PR TGM OPERATIONAL PROCEDURE MANAGEMENT OF CHANGE

The scope of the procedure covers changes to new product, plant, equipment, machinery, software, staffing or process that take place on the mine including changes to existing process, products or services. Scope examples include changes to roads (construction or diversion).

When change management thresholds for modifying the road network or traffic flows are crossed, supervisors apply relevant parts of the site change management process.

OFI-109 Improve management of change for road and traffic flow changes

Workshop participants report that changes to the road networks and traffic flows are not always communicated to all stakeholders.

Lack of vehicle operator knowledge about changes to traffic flows and road networks can lead to significant vehicle interactions.

When changes to road networks and traffic flows are made, apply the stakeholder notification process detailed in site procedures. Consider developing a communication logs communications with key stakeholders such as maintenance and service personnel, Business Partners, Emergency Response, Drill and Blast, Technical department etc.

New performance standards controls are communicated and implemented.

Traffic modifications, new hazards and their controls are logged and communicated to shift crews.

OFI-120 Review how changes to traffic flows and road networks are communicated to stakeholders.

Workshop participants confirm that site management of change processes are applied to manage changes in road networks and traffic flows.

However, communication of changes to all stakeholders is reported as being inconsistent. This has caused vehicle interaction issues.

Review how communication about traffic management changes is planned and executed. Identify all stakeholders and confirm communication channels, review recent examples and apply for future changes to traffic management and road networks.

CFM-CPA.10.20 Operators of heavy and light vehicles (or pedestrians) fail to follow the designated travel path CFM-CRA.03.01 Operator fails to identify and act on changes in conditions: reduced visibility, road narrowing, road surface etc. CFM-EPA.31.20 Equipment or component failure during operations e.g. brakes or steering or controlled functions CFM-LDA.42.01 Reducing vehicle interactions through segregation is inadequately considered in mine design and work planning CFM-LPV.41.20 Loading requirements for vehicles inadequately considered in mine design, equipment selection and work planning CFM-LRA.44.01 Inadequate Inspection and Management of Operating Environment CFM-SPA.81.07 Inadequate implementation of site traffic management plan CFM-SPA.88 Inadequate management of change CFM-SRA.87 Inadequate monitoring that mine traffic management requirements have been implemented and are being maintained
OFI-163: Review Road Construction and Maintenance Standards. OFI-141: Review, update, and apply the Tarkwa Traffic Management Plan. BI-SPV.81.10 Clear accountabilities for designers, surveyors, engineers, and planners in site relevant management plans

Site mine and road design guidelines and execution plans identify specific accountabilities for designers, engineers, and planners.

Site mine and road design guidelines and execution (e.g. traffic) management plans confirm site performance requirements and include specific accountabilities for designers, engineers, and planners.
Designers, Surveyors, Engineers, and Planners reference and apply relevant site management plans (for stability, road design and traffic management) to provide for safe and productive operations.

Designers, Surveyors, Engineers, and Planners manage and allocate resources to:

  • Develop and maintain work areas, roads and supporting infrastructure that meet site, company, and regulatory design standards and requirements.
  • Develop, maintain, review, and update the site management plans (as required).

Designers, surveyors and engineers generate designs by applying site requirements and, as required, conducting risk assessments for new locations or requirements.

Short term planners trained and assessed in mine design guidelines and develop plans according to the guidelines.

Issued designs are formally reviewed and marked as approved to mine or construct.

Traffic management is considered at each process step.

OFI-141 Review, update, and apply the Tarkwa Traffic Management Plan

GHG Tarkwa Traffic Management Plan, Mining Operations Procedure, TGM 1.10.54 WI was first approved for use on the 01-03-07. It is still current but has not been reviewed and updated since initial publication. It is a comprehensive document that confirms a range of site design and operating requirements that reflect good mine design and operating practice at Tarkwa.

However, during the Tarkwa 2024 Vehicle Interaction Control Effectiveness (VICE) review, workshop participants identified misalignments between this key reference document and operational practice and conditions. These include:

  • Road and ramp conditions – construction and maintenance
  • Non-conforming intersections and circles (roundabout) design and construction 
  • Limited availability and use of radios for general pit communications
  • Unclear Positive communications e.g. passing, and approaching mobile equipment
  • Obscured or missing Traffic Signage
  • Lack of infrastructure and signage to support management of pedestrians
  • Parking practices not aligned with documented requirements for physical segregation from heavy vehicles

These issues were confirmed by supporting consultants during mine tours and interviews.

Consider a review of the Tarkwa Traffic Management plan in conjunction with the development of Gold Fields Minimum Standards for Vehicle interaction controls. At a minimum the review should revisit and update minimum requirements for:

  • Intersection design – bench mark against industry developments since 2007 including defaults to T intersections where possible
  • Simplifying intersection design and construction to fully leverage upgrades and to support successful further deployment of CAS technology
  • Road and ramp maintenance
  • Positive communications protocols and practices

OFI-163 Review Road Construction and Maintenance Standards

Workshop participants report that haul road construction and maintenance is sometimes inadequate.

Issues include steep ramps sometimes greater than 10%, rough ramps, substandard maintenance on haul roads. This situation increases equipment and tyre damage, slows production, and physically stresses operators.

Confirm Tarkwa Mine road design standards and update processes to construct and maintain infrastructure to site standards.

Regular planning meetings review traffic management.

Design plans and related instructions are signed off by competent accountable personnel confirming that relevant road design and traffic management requirements are being met.

Mine planners consider future vehicle interaction hazards and reliable controls.

CFM-LDA.42.01 Reducing vehicle interactions through segregation is inadequately considered in mine design and work planning CFM-LRA.44.01 Inadequate Inspection and Management of Operating Environment CFM-MDA.61.06 Inadequate work planning means that heavy vehicle operators approach fixed structures that are incidental to achieving operational outcomes CFM-SDV.81.20 Inadequate mine traffic management plan (specification) CFM-SRA.87 Inadequate monitoring that mine traffic management requirements have been implemented and are being maintained
OFI-163: Review Road Construction and Maintenance Standards. OFI-141: Review, update, and apply the Tarkwa Traffic Management Plan. BI-SPV.81.05 Clear accountabilities for managers, superintendents, and supervisors in site relevant road design guidelines and traffic management plans

Site road design guidelines and traffic management plans identify specific accountabilities by organisation position.

Site road design guidelines and traffic management plans confirm site performance requirements and assign accountability for their delivery to an organisation position.

Competent senior managers, line managers, engineers and technical workers, and supervisors understand their responsibilities and accountabilities to:

  • Develop and maintain roads and supporting infrastructure that meet site, company, and regulatory design standards and requirements.
  • Anticipate, identify, prevent, and mitigate compromises to roads and supporting infrastructure
  • Develop, communicate, and maintain effective traffic management plans.

GHG Tarkwa Traffic Management Plan, Mining Operations Procedure, TGM 1.10.54 WI as approved for use 01-03-07

Part 3 Responsibility

This section confirms functions and tasks by responsible position for Managing Director, General Manager, Designated Managers and department Managers, Mining Manager, Protection Service Manager, Learning and Development Training Coordinator, Human Resources, direct and indirect employees, and visitors.

Design and Construction Accountabilities Reference 6.1.2.6

All road designs by the planning team outside the mine site must be reviewed by the Chief Surveyor, Senior Mine Engineer, and Unit Manager Mining before the mine manager’s final approval. However, all in-pit roads (permanent and temporary) must be reviewed by the Chief Surveyor and Senior Mine Engineer before the mining manager’s final approval. After the road is constructed, it should be signed off.

OFI-141 Review, update, and apply the Tarkwa Traffic Management Plan

GHG Tarkwa Traffic Management Plan, Mining Operations Procedure, TGM 1.10.54 WI was first approved for use on the 01-03-07. It is still current but has not been reviewed and updated since initial publication. It is a comprehensive document that confirms a range of site design and operating requirements that reflect good mine design and operating practice at Tarkwa.

However, during the Tarkwa 2024 Vehicle Interaction Control Effectiveness (VICE) review, workshop participants identified misalignments between this key reference document and operational practice and conditions. These include:

  • Road and ramp conditions – construction and maintenance
  • Non-conforming intersections and circles (roundabout) design and construction 
  • Limited availability and use of radios for general pit communications
  • Unclear Positive communications e.g. passing, and approaching mobile equipment
  • Obscured or missing Traffic Signage
  • Lack of infrastructure and signage to support management of pedestrians
  • Parking practices not aligned with documented requirements for physical segregation from heavy vehicles

These issues were confirmed by supporting consultants during mine tours and interviews.

Consider a review of the Tarkwa Traffic Management plan in conjunction with the development of Gold Fields Minimum Standards for Vehicle interaction controls. At a minimum the review should revisit and update minimum requirements for:

  • Intersection design – bench mark against industry developments since 2007 including defaults to T intersections where possible
  • Simplifying intersection design and construction to fully leverage upgrades and to support successful further deployment of CAS technology
  • Road and ramp maintenance
  • Positive communications protocols and practices

There are formal processes and design references that are applied by competent and experienced line managers to:

  • Develop, maintain, review, and update the site traffic management plan (or equivalent)
  • Maintain existing roads and supporting infrastructure.
  • Develop new roads and supporting infrastructure.

The design references set site performance standards and consider site, company, and regulatory design standards and requirements.

OFI-163 Review Road Construction and Maintenance Standards

Workshop participants report that haul road construction and maintenance is sometimes inadequate.

Issues include steep ramps sometimes greater than 10%, rough ramps, substandard maintenance on haul roads. This situation increases equipment and tyre damage, slows production, and physically stresses operators.

Confirm Tarkwa Mine road design standards and update processes to construct and maintain infrastructure to site standards.

Traffic management plans are applied and maintained.

Site inspection and reporting processes confirm that new and existing roads and supporting infrastructure meet site performance expectations, for example: 

  • Supervisors monitor road construction and maintenance crews to confirm their activities meet site requirements
  • Superintendents and planners schedule operations for safe and productive traffic management outcomes 
  • Mine planners consider future vehicle interaction hazards and reliable controls
CFM-CPA.11.05 Operator does not drive on available segregated roads CFM-LDA.42.01 Reducing vehicle interactions through segregation is inadequately considered in mine design and work planning CFM-LDV.42.02 Speed limits and over-speed management are inadequately considered in mine design and routine work planning CFM-LDV.44.08 Blind spots on heavy vehicles are not considered in workplace layout CFM-LRA.44.01 Inadequate Inspection and Management of Operating Environment CFM-SDV.81.20 Inadequate mine traffic management plan (specification) CFM-SPA.90 Emergency response is significantly delayed CFM-STA-91 Regulator prosecution CFM-SDA.90 Emergency or incident response is inadequate CFM-CTA.11.01 Supervisor does not identify or act when operator is fatigued or intoxicated
OFI-162: Review mine planning input to speed limits. OFI-168: Confirm that experienced senior managers have oversight of site Traffic Management Plans. BI-SPV.98.01 There is a documented site Traffic Management Plan

There is a documented and current site Traffic Management Plan that assigns accountabilities and details the processes required for safe and operationally integrated outcomes when working with mobile equipment.

There is a site process for developing, implementing, and maintaining a traffic management plan (TMP) or equivalent that: 

  • Documents the safe and productive outcomes required when working with or around mobile equipment
  • Includes requirements covering travel to and from the site (journey management) and addresses health and hygiene considerations for site rest and comfort areas
  • Identifies the situations and circumstances, where working with or around mobile equipment can result in fatalities, injuries and incidents (assessing hazards and risks)
  • Details the business and operational processes that prevent or mitigate the development of these potentially harmful situations and circumstances
  • Confirms how the status of these business and operational processes is monitored
  • Describes how these business and operational processes are maintained and improved

GHG Tarkwa Traffic Management Plan, Mining Operations Procedure, TGM 1.10.54 WI as approved for use 01-03-07

Part 2 Scope

The scope of this document encompasses all Tarkwa Mine surface operations including contractors and near mine exploration activities. This plan applies to all roads that are serviced and controlled by Gold Fields Tarkwa Mine including all haul roads to the mining areas and any other areas used by vehicles and equipment on site such as car parks, Tailings Dam access roads, ROM pads, Waste dump and workshop areas. This plan outlines and controls the operation of all vehicles and equipment operating on site and the required vehicle and equipment standards that must be met. All personnel, including contractors and visitors, shall comply with the requirements outlined in this document.

The Traffic Management Plan details the site processes:

  • That ensure that people who operate or work around mobile equipment are trained, competent and authorised.
  • That govern how fit-for-purpose mobile equipment is selected and approved for site use. 
  • For managing pedestrian and mobile equipment interactions and mobile equipment to mobile equipment interactions.
  • That guide knowledgeable and experienced people through the design, construction, and maintenance of the operating environment for mobile equipment.

The TMP also confirms there is adequate capability and a plan for managing mobile equipment emergencies involving:

  • Trauma first aid
  • Freeing trapped or pinned personnel
  • Rescue from heights
  • Equipment fires
  • Equipment contacts with powerlines
  • Equipment struck by lightning

The TMP also documents how relevant external to site expectations are met for:

  • Regulatory and legal obligations
  • Company requirements
  • International Standards and good practice

OFI-168: Confirm that experienced senior managers have oversight of site Traffic Management Plans

Workshop participants discussed how experienced senior management from both Business Partners and Gold Fields have oversight and approve site traffic management plans and related processes. They also noted the extensive experience of senior managers from both Business Partners and Gold Fields.

While processes are in place to delegate authority and review effectiveness, participants noted that pit conditions were not always to standard with variation in design and construction.

Review and implement processes for maintaining, updating, and communication site traffic management plans. Confirm that site design and construction standards are applied and monitored.

The TMP is reviewed, updated, and confirmed as being fit-for-purpose by senior management:

  • After high potential mobile equipment incidents
  • Before significant operational changes e.g. engagement of contractors, opening of new production areas, deployment of new equipment etc.
  • Before the introduction of new technology e.g. mobile equipment operator fatigue monitoring, proximity detection systems etc.
  • Periodically – at least annually
CFM-EPV.27.20 Mobile Equipment does not meet standards for safe access, lighting, signage and identification markings CFM-LDA.42.01 Reducing vehicle interactions through segregation is inadequately considered in mine design and work planning CFM-LDA.43.01 Vehicle parking, including emergency parking is inadequately considered in mine design and routine work planning CFM-LDV.42.02 Speed limits and over-speed management are inadequately considered in mine design and routine work planning CFM-LDV.42.20 Reducing vehicle interactions through intersection design and traffic rules is inadequately considered in mine design and routine work planning CFM-LPV.41.20 Loading requirements for vehicles inadequately considered in mine design, equipment selection and work planning CFM-LPV.44.02 Operational personnel do not maintain minimum standards for berms, windrows and other zone protection. CFM-MDA.61.01 Reducing vehicle interactions by maintaining clearances is inadequately considered routine work planning CFM-MPA.72.01 Access control infrastructure is inadequate CFM-SDV.81.20 Inadequate mine traffic management plan (specification) CFM-SPA.81.07 Inadequate implementation of site traffic management plan CFM-SPA.88 Inadequate management of change CFM-SRA.87 Inadequate monitoring that mine traffic management requirements have been implemented and are being maintained
OFI-168: Confirm that experienced senior managers have oversight of site Traffic Management Plans. BI-SRV.83.02 Senior management review, update, and confirm the Traffic Management Plan as being fit-for-purpose

Senior managers periodically confirm that the site Traffic Management Plan (or equivalent) is fit-for-purpose.

The Traffic Management Plan is reviewed, updated, and confirmed as being fit-for-purpose by senior management:

  • After high potential mobile equipment incidents;
  • Before significant operational changes e.g. engagement of contractors, opening of new production areas, deployment of new equipment etc.
  • Before the introduction of new technology e.g. mobile equipment operator fatigue monitoring, proximity detection systems etc.
  • Periodically – at least annually.

Occupational Health and Safety (OH&S) Management System Manual Ref No – HSMP 1.0 MN Implementation Date – 24/12/2004

5.1 LEADERSHIP AND COMMITMENT

TGM Management shall demonstrate its commitment to Health and Safety leadership by:

Leading by example;

  • Communicating positive health and safety values and behaviours throughout TGM;
  • Allocating adequate resources to health and safety management;
  • Establish processes to identify and assess health and safety hazards and to ensure compliance with legal and other obligations;
  • Co-ordinating, planning and delegating authority as appropriate;
  • Committing to measurable objectives, performance indicators and targets aimed at the elimination of occupational injuries and illness;
  • Ensuring that employees can participate in Health and Safety Management System activities;
  • Measuring performance and maintaining corrective action systems; and
  • Regularly reviewing the effectiveness of the Health and Safety Management System.

Traffic Management Plan reviews are prepared by Technical and Operational superintendents and reviewed by relevant stakeholders representing Survey, Engineering, Maintenance, Development, Services, and other relevant sections.

The review process also involves inputs from knowledgeable and experienced operators, supervisors and health and safety committee members.

OFI-168: Confirm that experienced senior managers have oversight of site Traffic Management Plans

Workshop participants discussed how experienced senior management from both Business Partners and Gold Fields have oversight and approve site traffic management plans and related processes. They also noted the extensive experience of senior managers from both Business Partners and Gold Fields.

While processes are in place to delegate authority and review effectiveness, participants noted that pit conditions were not always to standard with variation in design and construction.

Review and implement processes for maintaining, updating, and communication site traffic management plans. Confirm that site design and construction standards are applied and monitored.

Routine operational reports confirm that the road network has been constructed and is being maintained to standard.

By exception incident reporting.

Formal reviews of the Traffic Management Plan to confirm if the site performance requirements are being met.

Reviews also consider alignment between site performance requirements and

  • Industry good practice
  • Regulatory requirements
  • Company standards
CFM-EPV.27.20 Mobile Equipment does not meet standards for safe access, lighting, signage and identification markings CFM-LDA.42.01 Reducing vehicle interactions through segregation is inadequately considered in mine design and work planning CFM-LDA.43.01 Vehicle parking, including emergency parking is inadequately considered in mine design and routine work planning CFM-LDV.42.02 Speed limits and over-speed management are inadequately considered in mine design and routine work planning CFM-LPV.41.20 Loading requirements for vehicles inadequately considered in mine design, equipment selection and work planning CFM-SDA.86 Work Environment and Work Demands result in Fatigued Mobile Equipment Operators or other Health Affects CFM-SDV.81.20 Inadequate mine traffic management plan (specification) CFM-SPA.81.07 Inadequate implementation of site traffic management plan