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Frazil Ice Problems in Intakes at Montreal

by Fred E. Parkinson, LaSalle Hydraulic Lab Ltd, LaSalle, Que, Can,



Document Type: Proceeding Paper

Part of: Cold Regions Engineering

Abstract:

Intakes located in reaches of the St. Lawrence River that stay open all winter can be subjected to frazil ice formation for nearly three months. The City of Montreal intake is a key example of this case, where long term studies have defined the problem very well, and mitigation measures have been implemented. Further downstream, in reaches where the active frazil has turned into frazil slush, the intakes at times must deal with massive quantities of fine slush and ice platelets which can block intake trash racks. These different river conditions and intake problems are discussed as well as the state of progress in finding solutions.

Subject Headings: Water intakes | Ice | Water supply systems | Water pollution | Rivers and streams | Solid wastes | Ice formation | Canada | Montreal | Quebec

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