Matt linked over to Top Plants: Edison Sault Hydroelectric Plant Sault Ste. Marie, Michigan in PowerMag, which says (in part):
Hydroelectric projects are unique in that as long as the water is flowing and the mechanicals are periodically upgraded, there are few reasons their turbines won’t continue making electricity into the next century. The energy source may be renewable, but so is the plant itself. An exceptional example is Michigan’s 107-year-old Edison Sault Hydroelectric Plant, which combines historic architecture with modern technology to successfully generate 25 to 30 MW of electricity when operating at full load.
…Excavation of the hydropower plant’s canal began in September 1898 and was completed in 1902. Concurrently, construction of the Edison Sault Electric Hydroelectric Plant began in March 1900 and was completed in 1902. Official opening of the facility was held on October 25, 1902. At the time of completion, the plant was second only to Niagara Falls in terms of hydro development.
The facility is constructed of stone and steel. Much of the stone that was used was excavated from the power canal during its construction. Additional stone was used on other local landmarks throughout the City of Sault Ste. Marie.
You can read on for more (including diagrams) and visit the Cloverland Electric Cooperative Hydroelectric Plant page for more!
More from Sault Ste. Marie on Michigan in Pictures!