Mobley Engineering

• The 4th of 6 dams built on the lower Au Sable River
• Located in Mio, Michigan
• Completed in 1916
• The first hydroelectric plant to use a conduit or under-sluice spillway
• 4,900 kilowatt capacity

Mio Upwelling System

• To enhance turbine release temperatures for downstream fish habitat

• 2 - 25 foot diameter upwelling diffusers
• Supplied by portable air compressor

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