Keesler, m. Paul (2008) "10 - the canals" in mohawk: discovering the valley of the crystals, north country press : 9781595310217. "sediments, including rock, cobble, gravel and sand, poured into the mohawk river from tributary streams during highwater periods, creating bars near the mouths of streams, and riffs and rapids further downstream. While many of these deposits served as river crossings, they were obstacles to navigation. The wilnc adjusted these obstacles by removing rocks, cutting deeper channels. And building modified eel weir dams. ".
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