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WSPP286
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WSPP286
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Last modified
1/26/2010 4:16:10 PM
Creation date
4/23/2007 9:58:44 AM
Metadata
Fields
Template:
Water Supply Protection
File Number
8240.200.45.J
Description
Colorado River Threatened-Endangered - RIPRAP - Red Lands Project-Fish Ladder - Enviro Studies
State
CO
Basin
Colorado Mainstem
Water Division
5
Date
5/1/2004
Author
DOI-BOR
Title
Final Environmental Assessment and Finding of No Significant Impact - RE- Redlands Power Canal Fish Screen - 05-01-04
Water Supply Pro - Doc Type
Report/Study
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<br />0009~7 <br /> <br />rights. Under an existing; agreement with the Colorado Water Conservation Board that expires in <br />2005, Reclamation ensures deliveries to maintain 300 cfs below the Redlands Diversion Dam <br />with releases from the upstream Aspinall Unit for Redlands Fish Passage opeFations. Under the <br />proposed action, 40 cfs of the 300 cfs would be used for fish screen operations. <br /> <br />A bypass channel capable of diverting RWPC's total water right of 850 cfs is included in the fish <br />screen designs. During times when the fish screen is inoperable because of ice or debris, <br />isolation bulkheads would be used to bypass the fish screen. The installation of the fish screen, <br />would result in a minimal canal head loss. In 2003; RWPC installed flashboards on the diversion. <br />dam to raise the water elevation. <br /> <br />R WPC would not be able to divert water through the power plant for a 5 month period between <br />Noyember 1 and April 1 to dewater the fish screen construction site. RPWC diverts water from <br />'the Redlands Diversion Dam during this period only for hydropower generation. Construction <br />dewatering would result in a loss of hydropower revenue during canal dewatering and Recovery <br />'Program has ~greed to' compensate RWPC for hydropower revenue losses during construction. <br /> <br />The City of Grand Junction's water rights are dependent on RWPC diversions. Construction <br />, activities could be coordinated to continue diversions until November 1 st, and resume by April 1 51 <br />to allow adequate time for the fish screen and bypass channel construction. However, it is <br />RWCP's discretion when they dewater their canal. Operation and maintenance of the fish screen <br />would have no effect of the City of Grand Junction's ability to exercise their water right. <br /> <br />Issue: Reclamation has an existing agreement with the Colorado Water Conservation <br />Board to maintain 300 cfs of river flow below the Redlands Diversion Dam. <br /> <br />Existin2 Conditions: In 1996, Reclamation entered into an agreement with the Colorado <br />Water Conservation Board (CWCB) to deliver water from the Aspinall Unit to ensure that a <br />minimum of300 cfs was maintained downstream of the Redlands Diversion Dam in the months <br />,of July through October for the benefit of the Colorado'pikeminnow and razorback sucker. The <br />300 cfs is used to operate the Redlands fish ladder and maintain adequate flows below the dam to <br />allow endangered fish to navigate upstream from the Colorado River,to the fish ladder entrance. <br />The interim agreement expires in 2005 and a permanent agreement regarding flows below the <br />Redlands Diversion Dam will be addressed in the Environmental Impact Statement and Record <br />of Decision for operational changes forthe Aspinall Unit that are related to compliance with the <br />Endangered Species Act (ESA). During the period between when the agreement expires (2005) <br />and the issuance of a Record of Decision, Reclamation will to the extent allowable under State <br />and Federal laws, attempt to release from the Aspinall Unit sufficient water to maintain a <br />minimum flow of 300 cfs during the months of July, August, September, and October in the <br />Gunnison River from the Redlands Diversion Dam to the confluence of the Gunnison River with <br />the Colorado River. During drought periods when the 300 cfs flow below Redlands may not be <br /> <br />12 <br />
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