Electrocution from Energised Overhead Conductors
HighPower pole work occurs in immediate proximity to overhead electrical conductors that may remain energised during work. Voltages ranging from 230V single phase through to 33kV high voltage systems present electrocution risks through direct contact, arc flash, or induced voltage. Workers, tools, equipment, or crane booms contacting conductors cause immediate electrical current flow through the body resulting in cardiac arrest, severe burns, or death. Assumptions about isolation status without proper testing have caused multiple fatalities. Secondary conductors including street lighting circuits may remain energised when main distribution conductors are isolated.
Consequence: Immediate electrocution causing cardiac arrest and death, severe electrical burns requiring extensive treatment, arc flash injuries causing permanent vision loss and disfigurement, falls from heights triggered by electric shock, and potential public safety incidents if work compromises network integrity.
Crushing Injuries from Pole Handling and Lifting Operations
HighPower poles weighing 500-2000kg present crushing and impact hazards during transport, lifting, positioning, and installation. Concrete and steel poles have particularly high mass concentrated in relatively compact forms. Poles can slip from crane rigging if incorrectly attached, roll during ground handling if not properly secured, or fall if crane stability is compromised. Workers positioning poles in excavations face crushing risk if poles shift unexpectedly. Manual handling of pole components including crossarms, stays, and anchor assemblies presents strain injury risks.
Consequence: Fatal crushing injuries to head and torso if struck by falling or rolling poles, traumatic amputations if caught between pole and fixed object, fractures and soft tissue damage from impact, hernias and back injuries from manual handling, and potential multiple casualty incidents if poles fall in public areas.
Falls from Heights During Elevated Work on Poles
HighLineworkers operate at heights up to 15 metres when working from EWPs, climbing poles with fall arrest equipment, or working from extension ladders for lower pole work. EWP platforms must be correctly positioned and stabilised to prevent tipping or movement during work. Pole climbing requires proper fall arrest anchor points and connection procedures - anchor point failure or incorrect harness use has caused multiple fall fatalities. Overhead conductors create additional fall risk as electric shock from accidental contact causes loss of control and immediate falling.
Consequence: Fatal injuries from falls exceeding 3 metres height, traumatic brain injuries, spinal cord injuries causing permanent paralysis, multiple fractures, and compounding injuries if falls result in contact with energised conductors or impact with poles, vehicles, or equipment during descent.
Mobile Crane and Elevated Work Platform Stability
HighPower pole installation requires mobile cranes for lifting and positioning heavy poles, and EWPs for accessing elevated work positions. Ground conditions in road reserves may be unstable or have variable bearing capacity particularly after rain. Underground services may be present requiring load spreading mats. Crane outrigger setup on slopes or soft ground risks tipping during lifts. EWP outriggers on uneven ground or near excavations compromise stability. Overhead conductor clearances must be maintained to prevent boom or platform contact with energised lines.
Consequence: Catastrophic crane or EWP tipping causing multiple fatalities to operators and ground workers, electrocution if boom contacts overhead conductors, crushing injuries to persons in tipping path, property damage, and traffic incidents if equipment tips into roadway or onto parked vehicles.
Underground Service Strikes During Excavation
HighPower pole excavations typically extend 1.8-2.5 metres deep with diameters of 600-1200mm. Underground services including gas mains, telecommunications cables, water mains, sewer lines, and underground electrical cables may be present in road reserves and footpaths where poles are located. Excavation without proper service location causes strikes resulting in gas leaks, electrical faults, water main breaks, or telecommunications disruption. Gas main strikes present explosion risk. High voltage underground cable strikes cause electrocution and arc flash.
Consequence: Electrocution from striking underground high voltage cables, gas explosions and fire from gas main rupture, flooding and erosion from water main damage, asphyxiation in excavations if gas accumulates, extensive service disruption costs, and legal liabilities for infrastructure damage and service interruptions to communities.
Pole Preservative and Hazardous Material Exposure
MediumTimber power poles are treated with preservatives including copper-chrome-arsenic (CCA), creosote, or other biocides to prevent decay. Cutting, drilling, or sawing treated poles generates sawdust containing these hazardous chemicals. Old creosote-treated poles release oils when heated during cutting. Skin contact with preservative-treated timber causes dermatitis. Inhalation of sawdust containing arsenic or creosote compounds presents chronic health risks. Removed poles require disposal as hazardous waste - burning treated timber is prohibited as it releases toxic fumes.
Consequence: Chronic arsenic or creosote exposure causing long-term health effects including cancers, acute dermatitis and skin reactions from direct contact, respiratory irritation from sawdust inhalation, environmental contamination if preservatives leach from improperly stored poles, and regulatory penalties for improper hazardous waste disposal.
Traffic Hazards in Road Reserve Work Areas
MediumPower pole work frequently occurs in road reserves requiring traffic management to protect workers and maintain public safety. Mobile plant including cranes and EWPs may need to encroach into traffic lanes during lifting operations. Pole deliveries and removals require truck access to work sites. Passing traffic presents strike hazards to ground workers, equipment operators, and suspended loads. Distracted drivers may not observe traffic control particularly during night work. Poles extending across footpaths create pedestrian hazards.
Consequence: Fatal or serious injuries to workers struck by passing vehicles, injuries to public from collisions with work equipment or materials, property damage from vehicles striking cranes or EWPs, traffic incidents caused by inadequate traffic control, and legal liabilities from public injuries in inadequately protected work zones.