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Last modified
1/26/2010 12:34:33 PM
Creation date
10/11/2006 10:55:15 PM
Metadata
Fields
Template:
Water Supply Protection
File Number
8210.430
Description
Colorado River Basin Organizations-Entities - Gunnison - UVWUA - AB Lateral
State
CO
Basin
Colorado Mainstem
Water Division
5
Date
8/28/1990
Author
BOR
Title
AB Lateral Hydropower Project - Supplemental Environmental Impact Report - 1990 Summary of Final EIS and 1991 Record of Decision
Water Supply Pro - Doc Type
Report/Study
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<br />rF~~""'O <br />.~ ,.) -- .. -.) ,,) <br /> <br />., <br /> <br />SUMMARY <br /> <br />,1 <br />i <br />,< <br />'<r <br /> <br />now occurs under the no-action alternative. Along the <br />Uncompahg~e River, bank stabilization efforts would be requi~ed <br />to protect riparian areas. <br /> <br />Less than one percent of the total known population of the <br />endangered clay-loving wild buckwheat (Erigonum pelinophilum) <br />would be eliminated during construction of the penstock, Special <br />construction techniques in this area would be imposed to reduce <br />impacts, and off-site conservation measures to protect other <br />populations would be implemented, <br /> <br />'I' <br />, <br /> <br />~ <br /> <br />, <br />'1 <br />/; <br />] <br /> <br />7 <br /> <br />, FISHERIES <br /> <br />Without development, the Gunnison River would be expected to keep <br />its status as a Gold Medal fishery maintained by natural <br />reproduction, This fishery has been maintained under a large <br />range of flows during the 1980's, and no significant, long-term <br />habitat or water quality changes would be expected. <br /> <br />,1 <br />" <br />1 <br />'il! <br />1 <br />]' <br />;~ <br />., <br />1 <br />" <br />, <br /> <br />Development alternatives would divert additional flows from the <br />river, with the largest change occurring during the nonirrigation <br />season. Studies on the fish populations and fish habitat during <br />the 1980's indicate that the fishery would be maintained under <br />development conditions. Additional fishing pressure would occur. <br />Additional diversions through the Tunnel may increase the loss of <br />fish from the Gunnison River to the South Canal. <br /> <br />.J <br /> <br />J <br /> <br />"I <br /> <br />.~ <br />';J <br /> <br />3 <br /> <br />Under the no-action alternative, the fishery in the Uncompahgre <br />River between Ridgway Dam and the M&D Canal would be expected to <br />improve due to better flow patterns and water quality. With <br />development, habitat conditions may improve between the South <br />Canal and the Loutzenhizer Diversion (approximately 7 miles) and <br />decline between the Loutzenhizer Diversion and Montrose <br />(approximately 4 miles), Flow conditions and water quality <br />should improve downstream from Montrose, but other habitat <br />conditions may prevent development of a significant fishery, <br />River flows downstream from Delta would not be affected; <br />therefore; the endangered fishes that inhabit the lower Gunnison <br />and Colorado RiVers would not be affected, <br /> <br />'J <br />) <br />'1 <br /> <br />{ <br /><~ <br /> <br />, <br />" <br /> <br />'f <br /> <br />WILDLIFE <br /> <br />Significant changes are not projected under the no-action <br />alternative. Land use changes in the Uncompahgre yalley may <br />gradually reduce wildlife habitat and numbers, Land management <br />plans for lands along the Gunnison River, however, provide for <br />long-term habitat preservation, ' Possible impacts to wildlife <br />under development alternatives include loss of habitat in <br />construction areas and the direct loss of 11 acres of wetland. <br />These losses would be offset bya wetland replacement plan and <br /> <br />'J <br />1 <br />.~ <br /> <br />I <br />,~ <br /> <br />S - 11, <br /> <br />:~ <br /> <br />.~ <br /> <br />~",~,- , <br /> <br />~,' <br />
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