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FLOOD02168
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Last modified
1/25/2010 6:23:36 PM
Creation date
10/4/2006 10:40:43 PM
Metadata
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Template:
Floodplain Documents
County
Gunnison
Community
Uncompahgre Valley
Basin
Gunnison
Title
Uncompahgre Valley Reclamation Project - Hydropower - Part 4 - Scoping Report Gunnison River Contract
Date
1/1/1990
Floodplain - Doc Type
Project
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<br />move to the Uncompahgre River; however, extensive erosion. and <br />loss of riparian habitat in the Uncompahgre River associated with <br />increased flows will preclude this. <br /> <br />The Uncompahgre River with increased flows and channel protection <br />will be poor habitat for waterfowl. The bank protection plan <br />does not have a cost estimate; it could become astronomical. If <br />this gets to the point where Mitex pulls out, who's going to pay <br />for that. The impacts of the bank protection plan are not <br />presented in adequate detail. <br /> <br />The lower flows in the Gunnison River will reduce the chances of <br />extending the Black Canyon of the Gunnison National Monument into <br />a National Park downstream along the Gunnison River. <br /> <br />Increased silt in the Uncompahgre River will make irrigation more <br />difficult; selenium will also increase in the Uncompahgre River. <br /> <br />Project sponsors are unwilling to compromise, only their <br />alternatives are presented in the DEIS; why is not a smaller <br />project appropriate. <br /> <br />RESPONSE: The need for the power is discussed in additional <br />detail in chapter 1 of the environmental impact statement (EIS) <br />and the RESPONSE to written CONNKHTS r-6 and OR-l. Data show a <br />long-term need for additional power in the region. <br /> <br />Water temperatures do increase in summer months during low flow <br />periods; the EIS addresses this issue. Of particular importance <br />is that changes in river flows are least during the hot summer <br />months [because the Gunnison Tunnel (Tunnel) is operating at or <br />near capacity during irrigation periods]. Therefore, the change <br />from existing conditions as a result of implementing the project <br />would not be as dramatic as predicted in the comment. Temper- <br />atures do occasionally exceed optimum levels. Fishery data from <br />1988 do not indicate any adverse effect on the fishery; see <br />responses to the following written comments, including effects of <br />temperature: r-27, 37, 41 through 47, 62, 81, 87, 94 through <br />96; OR-23, 25 through 27, 63, and 68 through 70. <br /> <br />The frequency of ice formation in the Gunnison River would <br />increase significantly with project alternatives. Scouring of <br />the river bottom is not expected to occur except near Delta where <br />existing diversion darns create ice jams. In areas such as these, <br />scouring would occur, and use by species such as bald eagles and <br />waterfowl would decline. Ice formation is a natural occurrence <br />in the Gunnison River. Severe ice conditions exist on the river <br />upstream from Blue Mesa Reservoir, and aquatic insects and fish <br />continue to thrive. <br /> <br />Additional details are presented in the EIS on the bank <br />stabilization program on the Uncompahgre River. A cost estimate <br />is included, along with details on the long-term maintenance <br />program. Additional details on bank stabilization are found in <br />the following responses to written comments: r-5, 32 through 34, <br /> <br />P-2 <br />
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