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development in the Animas River Valley from Bakers Bridge to the mouth of the river has created a serious potential for disastrous flooding. Moreover, the Animas River Valley is listed by the State of Colorado as one of the ten areas in the State most susceptible to flash flooding according to the Definite Plan Report. IRRIGATION The Land The Animas La Plata project's EIS calls for provision of 118,100 acre-feet of water for irrigation. This water will be used to irrigate 21,480 acres which is presently irrigated and bring into production 48,620 new acres of irrigation. CO NM Total acres acres acres Full Service Land Non-Indian 30,310 4,530 34,840 Indian 13,400 380 13,780 ----------------------------- Subtotal 43,710 4,910 48,620 supplemental Service Non-Indian 17,300 3,720 21,020 Indian 460 460 ----------------------------- Subtotal 17,760 3,720 21,480 ----------------------------- Total 61,470 8,630 70,100 Topographically, the project area lies in a zone of transition between the La Plata and San Juan Mountains to the north and the Colorado Plateau to the south and west. In Colorado, mesas cut by streams, qulches, and arroyos are particularly prominent in the La Plata river drainage to the southwest. In New Mexico, the relatively narrow valley of the La Plata River and the broader valleys of the Animas and San Juan Rivers are the most prominent topographic features. Precipitation ranges from 9 inches at lower elevations in the southernmost part of the project area to about 18 inches at higher elevations in the northern part. The rainfall allows for moderately successful dry farming on the higher mesa lands in Colorado. project lands have an average elevation above.ea level of approximatelY 6,300 feet (8,400 feet near Hesperus to 5,200 feet near the confluence of the La Plata and San Juan Rivers). Approximately 85t of the lands lie between 6,500 6