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<br />SUMMARY
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<br />ALTERNATIVES
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<br />The alternative~ in the FEIS involve generating hydroelectric
<br />power using flows diverted from the Gunnison River and the
<br />elevation difference between the West Portal of the Tunnel and
<br />the Uncompahgre River in Montrose. A portion of the flows that
<br />would be diverted would also be used to meet UVRP irrigation
<br />needs; the remaining flows would be diverted for power
<br />generation. Four financially feasible alternatives, designated
<br />alternatives S, C, E, and F, are presented in the FEIS along
<br />with descriptions of plans that were studied but were found
<br />infeasible, Alternative A is the no-action alternative,
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<br />ALTERNATIVE A
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<br />Existing UVRP operating conditions would continue under
<br />alternative A, Water would continue to be diverted between March
<br />and November from the Gunnison and Uncompahgre Rivers to irrigate
<br />lands in Delta and Montrose Counties, Water diverted from the
<br />Gunnison River through the Tunnel is delivered to the Uncompahgre
<br />River through the South Canal and Cedar Creek. After entering
<br />the Uncompahgre River, Gunnison River flows are combined with
<br />Uncompahgre River flows and diverted into six major canal
<br />systems, Mean annual diversions from the Gunnison River are
<br />336,411 acre-feet,
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<br />ALTERNATIVE B
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<br />Alternative B wO,uld divert water from the existing South Canal
<br />and AB Lateral into a penstock leading to a new powerhouse near
<br />Montrose, Discharges from the powerhouse would enter the
<br />Uncompahgre River through an excavated tailrace, New construc-
<br />tion would include the powerhouse, penstock, transmission line,
<br />access roads, and tailrace. Modifications of existing facilities
<br />would include a portion of the existing AB Lateral, South Canal,
<br />and access roads,
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<br />The AB Lateral would be enlarged to a capacity of 1,235 ft'/s and
<br />concrete-lined for 7,100 feet of its length, A penstock with a
<br />1,135-ft'/s capacity.would be constructed to carry water from the
<br />lateral to a powerplant to be constructed north of Montrose, The
<br />other 100 ft'/s would be used for irrigation purposes, The
<br />38,380-foot penstock would be approximately 10 to 11 feet in
<br />diameter and would be buried, The powerplant WOuld contain two
<br />Pelton turbines ~nd generators designed to safely pass ~ maximum
<br />flow of 1,135 ft'/s, Power would be transmitted through a new
<br />115,OOO-volt (115 kilovolt [kV)) transmission line that would run
<br />north-south for approximately 3 miles between existing
<br />substations.
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<br />S - 5
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