That transmission line certainly feeds/runs the entire canyon, with Pacific Corp on the other side. I too don’t know the ins and outs of where they decide to turn off other than a combination of jurisdictional boundaries and sheer capacity of available power from the other side.
And speaking of power, the battery backup keeping my live scanner streaming the Fawn command and air traffic ran out of juice 110min into a power outage in Red Bluff. It’ll be down until PGE figures left from right.