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WSP11035
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WSP11035
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Last modified
1/26/2010 3:15:47 PM
Creation date
10/12/2006 4:40:52 AM
Metadata
Fields
Template:
Water Supply Protection
File Number
8541
Description
San Luis Valley Project
State
CO
Basin
Rio Grande
Water Division
3
Date
9/30/1982
Title
Final Supplement to Final Environmental Statement
Water Supply Pro - Doc Type
EIS
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<br />l <br /> <br />r <br /> <br />outside the 130,000-acre project boundary. The identifica~ion will assure <br />that the drawdown will not exceed 2 feet outside the project boundary. Records <br />of these measurements will be available to the public. <br /> <br />A total of 1,107 acre-feet of artesian water rights will annually be required <br />for mitigation of project effects. The points of use of the acquired water <br />rights will be transferred to the Alamosa NWR and Blanca WHA. About 800 acre- <br />feet of these water rights will be transferred to Alamosa NWR and 307 aCre-feet <br />to Blanca WHA. Three conveyance channel turnout structures, each with a <br />capacity to deliver 4,500 acre-feet in a 120-day period, will be provided on <br />the A1amosa NWR. <br /> <br />The conveyance channel will cross 1" 3 miles of the eastern portion of Blanca <br />WHA. The effects of conveyance channel and drawdown pumping on Blanca WHA will <br />be mitigated with 1,107 acre-feet of water per year. Of this amount, 800 acre- <br />feet will be diverted from the conveyance channel and 307 acre-feet will be <br />obtained from transferred water rights. A check structure to maintain water <br />level in the conveyance channel at or above existing ground water elevation will <br />be placed immediately south of the southern boundary of the Blanca WHA. Two <br />water turnout structures from the channel will be provided--one at the northern <br />end of the channel where it enters Blanca WHA and one near the southern end of <br />the channel in Blanca. An additional 2,500 feet of open-earth ditches will be <br />provided to move delivered water through wetland areas. Ten waterfowl nesting <br />islands will be provided at selected pond locations. About 1,700 feet of open- <br />earth ditches will be provided to move the water to areas where it can be most <br />beneficially used. Some 4,000 feet of dike disturbed by construction will be <br />replaced. <br /> <br />Mishak NWR, as described in the authorizing legislation and in the 1979 FES, <br />is no longer being considered for establishment. As much as 12,500 acre-feet <br />of project water would have been used to develop and manage the 5,000 acres of <br />wetlands and wetland habitat proposed in the plan of development for Mishak NWR. <br />This water was to be a one-for-one exchange of surface water inflow to Mishak <br />NWR. During the high water runoff year, 1979, the maximum total amount of sur- <br />face water present in the Mishak NWR was less than 325 acres. <br /> <br />Preliminary analyses (1979 FES) estimated wetlands affected totaled 40,000 <br />acres. Final analyses show that only 8,460 acres of wetlands will be affected. <br />An additional 16,098 acres of terrestrial vegetation will also be affected. <br />The combination of reduced project effects on wetlands and annual water supply <br />has resulted in the proposal that Russell Lakes WMA be substituted for <br />Mishak NWR. <br /> <br />The proposed Russell Lakes WMA will contain approximately 4,640 acres. About <br />1,900 acres of wetland and wetland habitat now exist in the Russell Lakes area. <br />Further development and management of Russell Lakes WMA will increase the area <br />of the wetlands and wetland habitat to about 3,000 acres. Russell Lakes WMA <br />will be managed and administered by the CDW. <br /> <br />e <br /> <br />r .,,; '.....'..C <br />',.J \. ..:\.0. L . <br />
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