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WSPC112
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Last modified
1/26/2010 4:15:50 PM
Creation date
4/22/2007 10:21:26 AM
Metadata
Fields
Template:
Water Supply Protection
File Number
8240.200.49.J
Description
Colorado River Threatened-Endangered - RIPRAP - Price-Stubb Fish Passage - Environmental Studies
State
CO
Basin
Colorado Mainstem
Water Division
5
Date
4/19/2004
Author
DOI-BOR
Title
Revised Supplemental Draft Environmental Assessment and Notice of Public Meeting - RE- Providing Endangered Fish Passage at the Price-Stubb Diversion Dam on the Colorado River - 04-19-04
Water Supply Pro - Doc Type
Report/Study
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<br />001638 <br /> <br />Revised Supplemental Draft Environmental Assessment-Chapter 2-Alternatives <br /> <br /> <br />Figure 2-Redlands Conventional Fish Ladder on the Gunnison River, Colorado <br /> <br />Constructed simultaneously, attraction flows could be incorporated into the hydropower <br />plant. Also if fish passage were constructed first, it would present site constraints on <br />hydropower plant construction. The Biology Committee of the Recovery Program does <br />not support two conventional fish ladders in close proximity due to biological concerns. <br /> <br />Design <br /> <br />The fish ladder would be built on the right bank of the riverl. Conceptual designs for the <br />development of the site show the ladder on the same side of the river as the power plant <br />intake of the proposed Jacobson Hydro No.1 Project (see Figure 3). The ladder would <br />consist of a 200 to 300 foot-long concrete channel, 6 feet in width, and 8 to 10 feet deep <br />similar to the fish passage constructed at the Redlands Diversion Darn (Figure 2). About <br />25 cfs of river flow would be diverted into the channel for the ladder. The upstream <br />entrance to the channel would have a trash rack to prevent debris from entering the fish <br />ladder. Baffles (vertically placed plates) would divide the ladder into a series of small <br />pools; fish would swim from pool to pool through openings in each baffle. The baffles <br />would be placed at appropriate intervals to keep flows at velocities that native fish can <br />swim against. The site would be fenced with a 6 foot-high fence for facility and public <br />safety. An existing access road would be used along the right-bank ofthe river to <br />provide construction and maintenance access. <br /> <br />1 Right bank refers to the right side of the river as viewed when looking downstream. <br /> <br />9 <br />
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