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Last modified
7/14/2009 5:02:32 PM
Creation date
5/20/2009 3:24:48 PM
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UCREFRP
UCREFRP Catalog Number
8089
Author
U.S. Bureau of Reclamation.
Title
Final Environmental Assessment Gunnison River Activities, Passageway Around the Redlands Diversion Dam and Interim Agreement to Provide Water for Endangered Fish.
USFW Year
1995.
USFW - Doc Type
Grand Junction, Colorado.
Copyright Material
NO
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the Clean Water Act has been obtained. If dewatering results in a discharge into the Gunnison <br />River, a Section 402 permit will also be needed. Commercial concrete and sand and gravel fill <br />will be used. Construction activities will require 10 to 25 workers. Construction is scheduled <br />to begin in the summer of 1995 and be completed by April 1996. <br />Fish Passageway Qpgmtion <br />The passageway will be operated by the Service on a daily basis, and Reclamation will be <br />responsible for maintenance. Redlands Water and Power will continue to operate the Redlands <br />Diversion Dam in accordance with Colorado water law and their FERC order granting <br />exemption from licensing of a small hydroelectric project (Project No. 6964). Redlands Water <br />and Power will not be responsible for any costs associated with the passageway. Normal <br />operation and maintenance of the Redlands Diversion Dam will not be affected by the fish <br />passageway facilities. The city of Grand Junction will continue to operate its water intake which <br />will be incorporated into the fish passageway forebay. The design and operation of the modified <br />intake will be such that harm to endangered fish is not anticipated. A construction, operation, <br />and maintenance agreement is being negotiated between RWPC, Reclamation, the Service, and <br />the city of Grand Junction. This agreement will spell out specific responsibilities of the parties. <br />A summary of this agreement is found in Appendix C. <br />The Service will monitor fish use of the passageway and of the Gunnison River. This <br />monitoring, to begin in 1996, will include radio tracking the fish to determine their movements <br />in relation to the passageway and netting of larval (recently hatched) fish. The Redlands Water <br />and Power Company will also be protected from hydropower losses, if such were to occur <br />because of operation of the fish passageway itself. At the present time, there is no <br />predetermined schedule for removing fish from the trap area described previously. The trap will <br />be monitored frequently enough to lessen any impacts, such as predation or injury, to the native <br />fish. <br />Interim Water Agreement <br />To ensure adequate flows to operate the fish passageway and to maintain and study habitat in <br />the Gunnison River downstream from the Redlands Diversion Dam, an interim (temporary, 5 <br />year) water agreement will be executed among Reclamation, the State of Colorado represented <br />by the Colorado Water Conservation Board, and the Service. Under the agreement, Reclamation <br />will deliver sufficient water from the Aspinall Unit to maintain a minimum flow of 300 cfs in <br />the Gunnison River below the Redlands Diversion Dam during the months of July through <br />October. Based on records from 1973 through 1994, the 300 cfs flow is already met or <br />exceeded 81 percent of the time in July through October and 86 percent of the time in November <br />through June, based on monthly averages. Thus releases under the water agreement would only <br />be necessary a limited time to meet the 300 cfs. <br />The 300 cfs represents the interim recommendation of the Service and may be modified as <br />additional data is collected. The 300 cfs was determined by measuring the depth of the river <br /> <br />8
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