Transmission line
This dam began generating electricity in December 1911, with an original capacity of 9,000 kilowatts, Transmission line ran 125 miles to Flint at a voltage of 140,000 volts, establishing a world record. Innovations included in the new project were three-legged, windmill-like towers that supported the transmission line and advances in insulator design. The Cooke plant was the first of six Au Sable River hydros completed over the next 12 years.