No EFIS I've used in the past 3 decades has depicted "power lines" but that has not been on rotary aircraft. That's nada, zilch, zero, zip.
Noticed on above link that zip line/ride had been installed as the world's longest zipline ride earlier this year. Was it duly noted on notams to warn aircraft in the area?
As it was still daylight at the time of accident there must have still been interest in those who find a thrill on the zipline to partake. Was anyone injured or worse while on the zipline at the time the helicopter made contact with it? Was the zipline severed?
Sadly similar accidents have occurred in the past
https://www.nytimes.com/1998/02/04/w...ift-cable.html
https://en.wikipedia.org/wiki/Cavale...disaster_(1998)
Lastly condolences to crew and passengers of tragically downed helicopter, may you rest in peace.