Text / Upper York Creek Ecosystem Restoration Project, Feasibility Study; Appendix A: Hydraulics Appendix

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Title: Upper York Creek Ecosystem Restoration Project, Feasibility Study; Appendix A: Hydraulics Appendix
Creator: U.S. Army Corps of Engineers
Date Created and/or Issued: 2006 August 01
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: The purpose of the feasibility portion of the Planning, Design, and Analysis (PDA) phase is to determine the feasibility and costs of various alternatives and recommend a single alternative that will enable fish passage through and upstream of York Creek Dam. Presently, steelhead are unable to access habitat upstream of the dam because of direct blockage of the dam. The existing fish ladder is inoperable and does not tie in to the creek below and above the dam. Water presently flows down a standpipe behind the dam and exits through an outlet pipe at the base of the dam. Primary objectives of this project are to improve fish passage in Upper York Creek, restore fluvial processes and decrease the risk of uncontrolled sediment releases at the dam, and to restore approximately two acres of habitat and connection between downstream and upstream of the dam. Secondary objectives of the project include the minimization of operations and maintenance activities and environmental impact, in addition to reducing erosion in the stream corridor. This appendix presents the hydrologic and hydraulic information for three alternatives: complete removal of Upper York Creek Dam, partial dam removal, and construction of a new fish ladder through the existing dam.
Scope/Content: Height: 50 Length: 140
Scope/Content: Date constructed: 1900.
Type: text
Form/Genre: digital copy
Identifier: ark:/86086/n21c1wbp
643
Language: English
eng
Subject: Alternative analysis
Dams
Dam retirement
Place: Napa River, CA
York Creek, CA
Upper York Creek Dam
United States

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