Dam Removal Methods, Elwha River, Washington

by Bruce Stoker, EBASCO Environmental, Bellevue, United States,
Jon Harbor, EBASCO Environmental, Bellevue, United States,

Document Type: Proceeding Paper

Part of: Hydraulic Engineering


Preparation of an Environmental Impact Statement (FERC, 1991) for licence applications for the Elwha and Glines Canyon hydroelectric projects on the Elwha River, Washington, included evaluation of dam retention and dam removal alternatives. Alternative methods for meeting resource objectives were evaluated for cost, engineering, and environmental constraints. Alternatives that were evaluated included dam retantion with the addition of fish passage facilities, removal of both dams, and removal of either the Elwha or Glines Canyon Dam. Comparative environmental and economic evaluations necessitated the formulation of specific dam removal plans. The plans are considered reasonable approximations of actual dam removal programs for assessment purposes.

Subject Headings: Dams | Rivers and streams | Hydro power | Canyons | Benefit cost ratios | Fish and fishery management | Economic factors | Power plants | Washington | United States

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