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Effects of sediment release following dam removal on the aquatic biota of the Klamath River: Final Technical Report

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Title: Effects of sediment release following dam removal on the aquatic biota of the Klamath River: Final Technical Report
Creator: Stillwater Sciences
Date Created and/or Issued: 1/1/09
Contributing Institution: UC Riverside, Library, Water Resources Collections and Archives
Collection: Clearinghouse for Dam Removal Information (CDRI)
Rights Information: Copyrighted
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.
Description: Scope/Content: Abstract: Four dams on the Klamath River are under consideration for removal: Iron Gate, Copco 1 and 2, and J.C. Boyle. These dams are located between river miles 196 and 225 in Oregon (J.C. Boyle) and California (Iron Gate, Copco 1 and 2), downstream of the Upper Klamath Lake. Dam removal options currently under consideration would result in 1.3-2.9 million metric tons of fine sediment (sand, silt, and finer) being transported into downstream reaches of the Klamath River (Stillwater Sciences 2008), resulting in high suspended sediment loads, which can result in deleterious effects on aquatic habitats and species. This report first summarizes Stillwater Sciences's analyses of the physical properties and concentrations of suspended sediment likely to result from sediment releases. It then focuses on the potential biological effects of sediment release on aquatic habitats and species if the dams were to be removed. In addition, opportunities to reduce the impacts of dam removal were explored, and recommendations are presented based on our analysis. The long-term benefits of dam removal (although assumed crucial to recovery of the aquatic biota) were not analyzed as a part of this study.
Scope/Content: Author affiliation: Stillwater Sciences
Type: text
Identifier: ark:/86086/n2fj2g76
952
Language: English
eng
Subject: Ecology and river restoration
Fisheries and fish passage
Sediment and channel dynamics
Dams
Dam retirement
Place: Klamath River, CA
Klamath River, OR
Copco 1 Dam
Copco 2 Dam
Iron Gate Dam
J.C. Boyle Dam

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