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Text / Sediment Impact Analysis for the Proposed Hemlock Dam Removal Project

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Sediment Impact Analysis for the Proposed Hemlock Dam Removal Project
Blair Greimann
Bureau of Reclamation
Jennifer Bountry
Timothy J. Randle
U.S. Department of the Interior
Date Created and/or Issued
Contributing Institution
UC Riverside, Library, Water Resources Collections and Archives
Clearinghouse for Dam Removal Information (CDRI)
Rights Information
Transmission or reproduction of materials protected by copyright beyond that allowed by fair use requires the written permission of the copyright owners. Works not in the public domain cannot be commercially exploited without permission of the copyright owner. Responsibility for any use rests exclusively with the user.
Scope/Content: Abstract: The U.S. Forest Service, Mt Adams Ranger District, is proposing to remove Hemlock Dam, a 26-foot high structure on Trout Creek, which is a tributary to the Wind River in southwest Washington. The purpose of the proposed action is to improve fish passage and aquatic conditions in Trout Creek. Trout Creek supports Lower Columbia River Steelhead, a fish that is federally listed as threatened under the Endangered Species Act. The concrete arch dam and associated fish ladder were originally constructed in 1935-1936 by the Civilian Conservation Corps (CCC) to provide water for hydroelectric power generation, and was modified in 1958 to provide irrigation water to the Wind River Tree Nursery. The hydropower was terminated in the 1950s and the diversion is not currently in use. The dam currently has a fish ladder that maintains a fish attraction flow of 18.5 ft3/s. The Wind River Tree Nursery was closed in 1997 and the dam is no longer used to divert water.
Scope/Content: Date constructed: 1935.
digital copy
Sediment and channel dynamics
Dam retirement
Trout Creek, WA
Wind River, WA
Hemlock Dam
United States

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