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Reference: RA-2026-YjuaHz3Z

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Route marker installation

Electrical

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Risk Assessment Matrix

SN Activity Hazard Consequence Groups Exposed Controls Initial Risk Additional Controls Residual Risk Actions
1
Complete HDPE Duct Infill
1. Vehicle movement and traffic hazards 2. Manual handling during loading/unloading 3. Uneven ground conditions
Personal injury, property damage
Site Personnel, Subcontractors, Public
1. Implement traffic management plan 2. Designated walkways 3. Mandatory PPE 4. Speed limit enforcement
P 3 × S 3
9
1. Comply with ADOSH SF CoP 27.0 2. Daily vehicle inspection 3. Toolbox talk
P 2 × S 2
4
2
Site mobilization and setup of temporary
Passing high-speed public traffic and moving site vehicles
Personal injury, property damage
Site Personnel, Subcontractors, Public
Approved TTM plan, high-visibility clothing (Class 3), physical water-filled/concrete barriers, advanced warning signs, and trained flagmen.
P 3 × S 3
9
Deployment of Truck Mounted Attenuators (TMA) and enforcement of reduced speed limit zone in coordination with local traffic authorities.
P 2 × S 2
4
3
Trench excavation and sub-surface ground preparation
Accidental strike on existing buried live electrical cables or gas utilities
Personal injury, property damage
Site Personnel, Subcontractors, Public
Utility mapping review, CAT & Genny cable avoidance scanning, and manual trial pits (pot-holing) prior to mechanical excavation.
P 3 × S 3
9
Mandatory Permit to Dig system, use of insulated hand tools near identified utilities, and continuous competent supervision.
P 2 × S 2
4
4
Uncoiling, handling, and positioning HDPE pipe
Sudden release of stored mechanical spring energy in coiled HDPE pipe
Personal injury, property damage
Site Personnel, Subcontractors, Public
Use of specialized pipe reeler/uncoiler frame, controlled strap cutting procedures, and establishing exclusion zones.
P 3 × S 3
9
Mandatory deployment of safety restraints/bands before unstrapping and wearing high-impact resistant safety glasses and gloves.
P 2 × S 2
4
5
HDPE pipe jointing via electrofusion and
High-temperature heating elements, hot molten plastic, and portable electrical generators
Personal injury, property damage
Site Personnel, Subcontractors, Public
Certified welding equipment, RCD-protected generators, heat-resistant safety gloves, and portable fire extinguishers nearby.
P 3 × S 3
9
Hot Work Permit implementation, provision of localized exhaust ventilation or respiratory protection (FFP3) in confined areas.
P 2 × S 2
4
6
Entry into underground chambers and manholes
Hazardous atmosphere (oxygen deficiency, toxic gases like H2S/methane), engulfment, or fall from height
Personal injury, property damage
Site Personnel, Subcontractors, Public
Confined Space Entry Permit, pre-entry 4-gas atmospheric testing, forced air ventilation, and tripod rescue system with harness.
P 3 × S 3
9
Continuous multi-gas monitoring during entry, dedicated trained top-person/standby monitor, and verified emergency rescue plan.
P 2 × S 2
4
7
Mechanical winch pulling of HDPE sub-ducts
High-tension winch wire snap, rotating capstans, and pinch/nip points
Personal injury, property damage
Site Personnel, Subcontractors, Public
Properly rated winching wire with calibrated weak-link swivel, emergency stop switches, and safety guards over rotating parts.
P 3 × S 3
9
Integrated load monitoring with automatic shut-off at peak tension limits and strict exclusion zones along the tension line.
P 2 × S 2
4
8
Duct proving (mandrel testing) and air
Uncontrolled high-pressure compressed air release and projectile ejection of foam pig or mandrel
Personal injury, property damage
Site Personnel, Subcontractors, Public
Calibrated pressure relief valves, secure containment/catcher cage at receiving duct end, clear exclusion zone enforcement.
P 3 × S 3
9
Mandatory Pressure Testing Permit, full-face protection shields for operators, and calibrated double-gauge manifolds.
P 2 × S 2
4
9
Pre-installation underground utility locating and mark-out
Unidentified live buried electrical cables or third-party utilities
Electrocution, electrical flashover, explosion, fatal burns, disrupted power distribution
Surveyors, Cable Jointer Assistants, Site Engineers
Obtain and review statutory utility asset drawings (as-builts); conduct Cable Avoidance Tool (CAT & Genny) scans across the alignment; calibrate detection equipment before use; mark identified utilities on ground with spray paint or pin flags.
P 4 × S 5
20
Ground Penetrating Radar (GPR) scan for complex crossings; implement Permit to Dig / Ground Disturbance Permit; verify depth using vacuum excavation if verification is critical.
P 1 × S 4
4
10
Loading, transport, and offloading of concrete and composite marker posts
Heavy, awkward pre-cast concrete markers (manual handling, load shifting)
Musculoskeletal disorders (MSDs), spinal injury, crushing of extremities from dropped loads
Drivers, Riggers, Ground Workers
Use mechanical lifting aids (HIAB, mini-crane, hydraulic tail lifts); secure loads with certified ratchet straps and edge protectors; ensure multi-person lifts for items >20kg; mandatory safety boots with metatarsal protection and grip gloves.
P 4 × S 3
12
Establish dedicated drop zones with exclusion perimeters; conduct pre-shift manual handling dynamic risk assessments; utilize powered all-terrain wheelbarrows.
P 2 × S 2
4
11
Manual excavation for marker post foundation pits
Direct strike on energized low/medium/high voltage cables with hand tools
Electric shock, severe arc flash injury, fatal electrocution
Excavation Crew, Laborers
Strict adherence to HSG47 / safe digging practices; enforce hand digging with non-conductive (insulated 1000V BS 8020) spades and shovels; no picks, forks, or mechanical breakers within 500mm of indicated cable lines; continuous scanning with CAT throughout digging.
P 4 × S 5
20
Station a dedicated spotter/banksman during all excavation; implement daily inspection of insulated hand tools; use air-pick or vacuum excavation in dense cable corridors.
P 1 × S 4
4
12
Mechanical post-hole augering in non-cable designated corridors
Rotating auger entanglement and striking unexpected buried services
Traumatic amputation, limb entrapment, arc blast, mechanical puncture of service line
Auger Operators, Banksmen, Ground Workers
Set minimum exclusion zone around operating auger (minimum 2m); ensure PTO/driveshaft guards are fitted and operational; verify area cleared by scanning and trial pits before boring; emergency stop testing prior to start-up.
P 3 × S 5
15
Fit auger rig with proximity sensors; maintain positive communication via two-way radios or standard hand signals; prohibit loose clothing and wear snag-resistant PPE.
P 1 × S 3
3
13
Working in proximity to overhead electrical power lines (OHL) along right-of-way
High-reach delivery vehicles, cranes, or vertical markers encroaching safe clearance distances
Electrical arc flash, vehicle electrification, fatal electrocution
HIAB Drivers, Riggers, Ground Workers
Survey overhead cable heights and establish GS6 goalposts/warning bunting; enforce strict clearance envelopes (e.g., minimum 15m from steel pylons, 9m from wooden poles); lower vehicle booms completely before transit.
P 3 × S 5
15
Install height-limiting restrictors on hydraulic cranes; assign a dedicated signaler/spotter equipped with an air horn to halt operations if clearance limits are breached.
P 1 × S 4
4
14
Handling, mixing, and pouring concrete/grout for marker foundation stabilization
Contact with wet cementitious mixtures and silica dust generation during dry mix handling
Chemical burns (cement dermatitis), eye injury/corneal abrasion, silicosis
Concrete Handlers, Laborers
Supply pre-mixed wet concrete where feasible; provide chemical-resistant nitrile/PVC gauntlets, safety goggles, and impermeable overalls; maintain clean eyewash stations within 10m of pouring point; wash stations provided on site.
P 3 × S 3
9
Mandatory FFP3 respirators during dry bag handling; barrier creams supplied and applied pre-shift; COSHH assessments briefed to all team members.
P 1 × S 1
1
15
Placement, plumb-alignment, and fixing of route marker posts and warning plates
Pinch points, sharp metallic edges on labels, and unstable marker posts before backfill
Lacerations, crushed fingers, impact injury from falling/collapsing marker post
Installers, Technicians
Use temporary wooden bracing or alignment stakes to secure marker prior to concrete set; wear EN388 cut-level D handling gloves; use deburred signage plates; employ mechanical clamps for leveling.
P 3 × S 2
6
Inspect edge finishes of stainless steel/composite labels prior to field deployment; verify post-plumb using magnetic levels without hand exposure under suspended structures.
P 1 × S 1
1
16
Route marker installation on road verges, pedestrian footpaths, and traffic corridors
Live vehicular traffic and interaction with pedestrians
Vehicle-pedestrian collision, crushing, multiple fatalities
Installation Crew, Public, Vehicle Operators
Deploy compliant Temporary Traffic Management (Chapter 8 / MUTCD); set up advance warning signs, lane closures, and Class 2/3 high-visibility safety cones; wear Class 3 Hi-Vis clothing; maintain clear safety buffer zones.
P 4 × S 5
20
Deploy an Impact Protection Vehicle (IPV) / crash cushion truck for high-speed carriageway verges; schedule roadside works during off-peak traffic or night shifts with localized mobile lighting towers.
P 1 × S 3
3
17
Transit and installation across rough, remote cross-country terrain
Slips, trips, falls on uneven slopes, hidden holes, boggy ground, and biological hazards (ticks, snakes)
Fractures, ligament sprains, vector-borne infections (e.g., Lyme disease), delayed medical evacuation
Field Installers, Drivers
Mandatory lace-up safety boots with high ankle support and deep tread; pre-planned access routes; satellite tracking / check-in check-out protocol for lone or remote working; carriage of off-road first aid kit and tick-removal tools.
P 4 × S 3
12
Use certified All-Terrain Vehicles (UTVs) with ROPS and trained operators; establish an Emergency Evacuation Plan with GPS coordinate logging for helicopter landing zones (HLZ).
P 2 × S 2
4
18
Backfilling, mechanical compaction, and site reinstatement around marker base
Hand-arm vibration (HAVS) and flying debris from plate compactors or tampers
Vibration White Finger, nerve damage, eye trauma, hearing degradation
Plant Operators, Ground Workers
Use low-vibration compactors/tamping rammers; implement job rotation to strictly limit vibration exposure below daily Exposure Action Values (EAV); wear anti-vibration gloves, safety glasses, and hearing protection (SNR 30+).
P 3 × S 3
9
HAVS electronic monitoring tags on equipment; maintain equipment service logs to avoid excessive vibration from worn dampeners; designate 3m flying debris zone around running tampers.
P 1 × S 2
2