Its service area covered four counties (Chippewa, Mackinac, Schoolcraft and Delta).
Edison Sault's only generating station was the Saint Marys Falls Hydropower Plant located on the St. Marys River in downtown Sault Ste.
Edison Sault's transmission system voltage is 138,000 volts.
Edison Sault had interconnections with Cloverland Electric and Upper Peninsula Power on its 69 kV subtransmission system.
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