topographical survey
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Task Risk Assessment Worksheet
Project
132 kv cable works
Client
Taqa
Consultant
Green
Main Contractor
El Sewdy
Subcontractor
Heliopolis
Activity
topographical survey
Assessors
Toor
Project Manager
signature
Ali
HSE Engineer
signature
—
Project Manager
signature
—
Civil Engineer
signature
—
HSE Engineer
signature
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 |
Mobilization and foot transit across uneven terrain and dense vegetation
|
Unstable ground, hidden holes, dense brush, and trip hazards
|
Ankle sprains, fractures, cuts, lacerations, or slips/trips/falls
|
Survey Technicians, Site Engineers
|
Visual ground inspection prior to walking, wearing ankle-support safety boots, clearing paths where necessary
|
P
4
×
S
2
8
|
Mandatory use of high-visibility snake gaiters in dense brush, establishing designated walking corridors, carrying first-aid kits
|
P
2
×
S
2
4
|
|
| 10 |
Surveying near overhead high-voltage power lines
|
Encroachment into safe clearance distances using extended survey poles or prism rods
|
Electrical arcing, severe electric shock, third-degree burns, fatality
|
Surveyors, Instrument Operators
|
Use of fiberglass non-conductive survey rods, maintaining safe distance limits per electrical safety regulations
|
P
3
×
S
5
15
|
Deploy height restrictors/goalposts, maintain strict minimum approach distances (MAD), appoint a dedicated spotter, obtain a Permit to Work (PTW)
|
P
1
×
S
5
5
|
|
| 11 |
Topographical mapping inside active electrical substations and switchyards
|
Accidental contact or close proximity to live busbars, transformers, and energized equipment
|
Arc flash explosion, severe electrical burns, fatal injury, power outage
|
Survey Crew, Substation Escort
|
Substation safety induction, work restricted to designated demarcated zones, mandatory escort by authorized electrical personnel
|
P
3
×
S
5
15
|
Wear minimum Category 2 Arc Flash rated PPE, utilize laser scanners/robotic total stations to minimize personnel movement near live bay limits
|
P
1
×
S
5
5
|
|
| 12 |
Driving survey stakes/pins into the ground near electrical infrastructure
|
Striking underground energized high-voltage cables or buried utilities
|
Electrocution, arc flash, power disruption, gas leaks/explosions
|
Surveyors, Field Assistants
|
Review of existing utility drawings and subterranean mapping before staking
|
P
4
×
S
5
20
|
Perform CAT & Genny ground scan before driving pins, use non-conductive wooden/plastic markers where underground utilities are suspected, soft-dig/hand-dig exploratory holes
|
P
1
×
S
5
5
|
Activity Log
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