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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 />" "iil <br />0011,' , <br /> <br />, <br /> <br />.. <br /> <br />megawatt hours (MWh). Approximately 1 mile of new transmission <br />line would be required and 2 to 3 miles would be upgraded. <br /> <br />Powerplant di$charges would enter the Uncompahgre River and <br />re-enter the Gunnison River near Delta, Colorado. Significant <br />flow, increases in the Uncompahgre River would result during the <br />nonirrigation season and a bank stabilization program involving <br />approximately 51,000 linear feet of the Uncompahgre River would <br />be required to reduce streambank erosion. <br /> <br />The FEIS describes substantial, economic benefits that would <br />accrue to the local area as a whole in the form of taxes, and <br />specifically to the UVWUA in the form of power revenues. A <br />reduction in revenues from river rafting would be offset by an <br />increase in revenues derived from hike-in anglers on the Gunnison <br />River. <br /> <br />^". <br /> <br />The FEIS also describes additional alternatives that were <br />considered but were deleted from detailed analyses for economic <br />reasons. Alternatives~ other than no action, were not considered <br />reasonable if they did not produce a financial feasibility ratio <br />greater than 1. These included alternatives with greater <br />Gunnison River minimum flows below the diversion to the Gunnison <br />Tunnel than proposed in the recommended plan and alternatives <br />that called for powerplants on the south Canal. <br /> <br />Alternative A (no action) <br /> <br />Alternative A represents the conditions of the affected area <br />without developing the Facility. It establishes the baseline for <br />evaluating environmental impacts caused by the proposed Facility. <br />It is considered the environmentally preferred alternative . <br />primarily bec~use it has the least risk of impacts to <br />environmental ,resources . Alternative A assumes that existing' <br />irrigation diversions from the Gunnison River to the Uncompahgre <br />Valley, which average 336,411 acre-feet of water per year, would <br />continue. The Aspinall Unit would continue to regulate river <br />flows upstream from the Gunnison Tunnel. Average annual flows in <br />the Gunnison River downstream from the Gunnison Tunnel would be <br />approximately '1,103 cubic feet per second (cfs). <br /> <br />,. <br /> <br />, <br /> <br />Under the no-action alternative, water that would be developed <br />for hydropower under the other alternatives would continue to be <br />available for other developments upstream or downstream from the <br />Gunnison Tunnel or for instream flows in the Gunnison River from <br />the Gunnison TUnnel downstream to the confluence with the <br />Uncompahgre RiVer (below the confluence, Gunnison River flows are <br />unaffected). Present flow regime in the Uncompahgre River should <br />not change significantly. <br /> <br />Important environmental resources associated with the Gunnison <br />River include the BLCA, a wilderness area and designated <br /> <br /> <br />3 <br /> <br />,) <br /> <br />i ~ <br /> <br />" <br />--< - ~ <br />",- ^-~ <br />',-- ,U; <br />iMi.ll <br />,F; .__>"""'.J:"k_;:,>___"__~;-....;..;i,;f~,,,,-~_ _~ <br />
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