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Reference: RA-2026-hA8AvJP6

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cable laying

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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
Cable Drum Transportation, Loading, and Unloading
Unstable drum, mechanical crane/forklift failure, improper rigging
Crushing injuries, severe physical trauma, equipment damage, fatality
Riggers, crane operators, banksmen, site personnel
Utilize certified lifting equipment and color-coded slings; employ competent/certified riggers; establish drop zone barricades; inspect drum spindles prior to lift.
P 4 × S 4
16
Mandatory use of tag lines to control load swing; formal Lift Plan approval by HSE Manager before execution.
P 2 × S 3
6
10
Trench Excavation and Ground Preparation for Direct Burial
Striking underground live utilities, collapse of trench side walls
Electrocution, gas explosion, engulfment, suffocation, severe injury
Excavator operators, ground workers, utility surveyors
Issue Permit to Work (PTW); perform CAT and Genny cable avoidance scan; dig trial pits manually; shore or bench trenches deeper than 1.2 meters.
P 4 × S 5
20
Enforce 1-meter safe distance hand-digging rule around identified services; continuous gas monitoring in deep trenches.
P 2 × S 4
8
11
Cable Drum Setup and Jack Elevation
Unstable ground, drum jack collapse, uncontrolled rotation of drum
Pinch injuries, foot crushing, structural tipping, fractures
Cable laying technicians, mechanical crew
Position drum jacks on level, compacted ground with steel outrigger plates; inspect jack hydraulic systems; use properly rated spindle bars.
P 3 × S 4
12
Fit mechanical drum braking systems; enforce safety footwear with metatarsal protection.
P 2 × S 2
4
12
Manual Handling and Physical Cable Pulling
Overexertion, awkward posture, sharp edges along trench/tray route
Musculoskeletal disorders (MSDs), spinal strain, severe lacerations, pinch injuries
Cable pulling crew, field laborers
Limit individual manual pull load; use job rotation; place cable rollers at maximum 2-meter intervals; mandate cut-resistant level E gloves.
P 4 × S 3
12
Conduct ergonomic pre-shift stretching sessions; conduct Toolbox Talk (TBT) on manual handling limits.
P 2 × S 2
4