Hard to see the pole - this was grabbed from Google Maps' Street View function. You should be able to make out the fact the crossarm is wider than usual, the crossbraces are inverted, and most importantly, there are three suspension strings (2 disks per) hanging from the arm. According to Mike Parker, this was once a common construction technique used on some of Mountain States Power's 22kV lines. After PP&L bought MSP in 1954, all the 22kV lines were knocked down to 12.5kV distribution. PP&L has since replaced this with their current construction methods.