The story
Cloverland Electric's transmission line voltage is 138,000 volts. Their subtransmission voltage is 69,000 volts. Distribution voltages are 14,400 volts and 13,200/7,620 volts. The cooperative has interconnections with Consumers Energy via two 138 kV cables submerged under the Straits of Mackinac and with Upper Peninsula Power Company and We Energies via 69 kV and 138 kV lines. The cooperative operates the venerable Saint Marys Falls Hydropower Plant (1902) as a partial supplier of power to their distribution system.
From Wikipedia’s article on Cloverland Electric Cooperative, shared under CC BY-SA 4.0.3