Incident Overview
Shortly after departing from a mine site, a helicopter contacted power lines. The nose gear struck an uninsulated static wire, which was part of a group of wires that also included another static wire and two black insulated power lines.
Crew Observations
Both crew members reported that they saw the black power lines and believed their rate of climb would provide sufficient clearance. The captain stated that he did not see the silver-colored static wires. None of the wires were marked.
Sequence of Events
After hitting the first set of lines, the helicopter initiated a descending turn. It then contacted a second set of power lines and a power pole. Subsequently, the helicopter collided with a switching house and came to rest alongside an earthen supply slope.