Holtwood Dam

Posted by on Apr 19, 2016 in | Comments Off on Holtwood Dam   In October 1905 McCall’s Ferry Power Co. began construction in Martic Township, Lancaster County, on what would be the second of four hydroelectric dams built to harness the power of the Susquehanna River below Harrisburg, Dauphin County. Twenty miles from the tidewater of the Chesapeake Bay, it was then the third longest dam in the world, built of solid concrete, 55 feet high. The...
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