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<br />Phase II would be served by a gravity-fed lateral from the New Mexico Irrigation Canal would
<br />be served by the Southern Ute Interim Irrigation Canal. However, as a result of additional
<br />studies conducted since the DSFES was filed, 1,512 acres of proposed full-service lands in
<br />New Mexico have been removed from the Project because of return flow water quality
<br />concerns (1,242 acres in Phase I, Stage Band 270 acres in Phase II).
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<br />The average yearly water supply to the La Plata, New Mexico, area would be reduced by
<br />approximately 3,860 acre-feet as a result of removing the 1,512 acres. This would reduce
<br />New Mexico's Colorado River Compact water allocation needed by the Project by 3,860 acre-
<br />feet. This water would be available for other uses in New Mexico.
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<br />At Durango Pumping Plant, Animas River flows would be diverted as shown on table 4.
<br />More flow would be diverted than in Phase I, Stage A on the average but minimum flow
<br />criteria would still be applied as described in Phase I, Stage A. Minimum historical flows
<br />would be increased as described in Phase I, Stage A.
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<br />When compared with historical stream flows, flows on the La Plata River downstream from
<br />Dry Side Canal would be moderately increased as a result of water released into the river from
<br />Dry Side Canal and Project return flows from M&I and agricultural use. Sections of the river
<br />currently dewatered during the irrigation season by existing historical diversions would
<br />experience year-round flows. Table 5 shows the flow comparisons with the historical monthly
<br />flow pattern at the Colorado-New Mexico State line U.S. Geological Survey (USGS) gaging
<br />station.
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<br /> Table 4. -Animas River average annual diversion
<br /> at Durango Pumping Plant'
<br /> (acre-feet)
<br /> Phase I
<br /> Phaserr
<br />Month Stage A Stage B (tota! Project)
<br />January 3,530 4,020 2,990
<br />February 3,180 3,800 2,780
<br />March 4,110 6,840 5,260
<br />April 4,150 14,810 13,650
<br />May 4,570 22,420 21,560
<br />June 4,440 27,040 28,410
<br />July 4,090 21,360 22,170
<br />August 3,480 12,790 13,600
<br />September 2,870 7,750 8,470
<br />October 4,020 8,290 9,170
<br />November 3,410 4,730 4,750
<br />December 3,700 4,470 3,550
<br />Tota!' 45,600 138,320 136,360
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<br />1 Historical hydrology recoTd 1929-89 used.
<br />, This Is not the total water supply for the Project because additional diversions occur at
<br />other locations within the Project area,
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