Columbia River Basin - System Configuration Study; Snake River Drawdown, Migratory Canal, Upstream Collector Planning Aid Report

Identification Information

Citation

Originator: Grettenberger, John and Craig Tuss

Publish Date: June 1993

Online Link: None

BPA Project #:

Contact Information

Agency: Oregon Department of Fish and Wildlife

Name: Cedric Cooney

Job Position: Natural Resources Data and Systems Manager

Telephone: 503-947-6094

E-Mail Address: cedric.x.cooney@odfw.oregon.gov

Description

Abstract: This Planning Aid Report (PAR) is provided to the U.S. Army Corps of Engineers, Walla Walla District, to assist with reconnaissance-level planning for the System Configuration Study (SCS), which is a component of the Columbia River Salmon Mitigation Analysis (CRSMA). A preliminary draft and draft of the PAR were circulated for review and comment, and comments have been incorporated or addressed in the PAR. The SCS is evaluating physical changes to the configuration of the Columbia River System for the purpose of improving survival for anadromous fish. The proposed changes include modification of spillways, powerhouses and associated structures on the lower Snake River, and the construction of additional dams and structures which would permit modifications in present system operation. This specific PAR addresses the lower Snake River drawdown alternatives and the upstream collection and transport alternatives, including the migratory canal and tube. In addition, specific requests have been made from the Columbia-Snake River Drawdown Committee to evaluate designs for a side-channel spi 11 way and downstream weir at each of the lower Snake River projects. These elements were not addressed in the preliminary draft of the PAR. Other elements of SCS, such as the John Day drawdown and upstream storage, are being addressed by the Portland and Boise Fish and Wildlife Ecological Services Offices of the U.S Fish and Wildlife Service. The objectives of this PAR are to: 1) Describe relevant fish and wildlife populations and habitat within the study area; 2) Describe future fish and wildlife habitat conditions without the project; 3) Appraise existing fish and wildlife utilization; 4) Evaluate impacts of project alternatives on fish and wildlife resources; 5) Identify data gaps and study needs which need to be addressed during feasibility; and 6) Identify potential mitigation opportunities and requirements. In order to evaluate a full range of alternatives to improve the survival of anadromous fish stocks in the Snake River, this PAR also recommends that alternatives to evaluate the removal of one to four dams on the lower Snake River, and permanent, partial drawdowns be included in the range of alternatives under consideration. The need to consider these alternatives has become evident as uncertainties associated with the initially proposed alternatives have developed.

Purpose:

Time Period of Content:

Geographic Extent: Snake River

Status: Final

Use Constraints:

Format: PDF file

Data Quality Information

Lineage-Source:

Data Information

No data information was supplied.

Entity and Attribute Information

Attributes Description: Field attribute information is available in the database table field descriptions.

Is a physical copy maintained for reference at Headquarters? Yes