SPRINGDALE POWER STATION OF WEST PENN POWER COMPANY—A "MOUTH OF MINE" PLANT. Looking along the 66,000 volt outgoing lines carried on J-D Thick Porcelain Insulators. The energy of the coal in the ground is here transformed and delivered to the consumer of electric power with minimum waste of labor and shipping facilities. (courtsey of Jimmy Burns; 1923 J-D catalog)