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1970-1979
  
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  • Ninth Street Dam
    Image       Alpena Power Company's Ninth Street Dam and Powerhouse across the Thunder Bay River in Alpena, Michigan.
    Image     Alpena Power Company's Ninth Street Dam and Powerhouse across the Thunder Bay River in Alpena, Michigan.
  • Draining the Thunder Bay River
    ImageNewspaper       In July of 1971, the Alpena Power Company lowered the Thunder Bay River by nine feet. This was done by opening the Ninth Street Dam and closing the Four-Mile Dam. The purpose of this was to allow the Detroit and Mackinac Railway crew to inspect the car bridge north of ...
    ImageNewspaper     In July of 1971, the Alpena Power Company lowered the Thunder Bay River by nine feet. This was done by opening the Ninth Street Dam and closing the Four-Mile Dam. ...
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19701970197119721973197419751976197719781979
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