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Show PART III IRRIGATION POTENTIAL Land Potentially irrigable lands in the Upper Colorado Region in addition to irrigated acreage comprise 7,058,600 acres or less than 10 percent of the total land area. The lands suitable for irrigation development are widely dispersed throughout the region. About 3,776,800 acres or 53 per- cent is. in the San Juan-Colorado Subregion, 2,112,100 acres or 30 percent in the Green River Subregion, and 1,169,700 acres or 17 percent in the Upper Main Stem Subregion. Many of these lands, although having soil, topographic, and drainage conditions favorable for irrigation, are lo- cated where water supply is insufficient or inaccessible at the present time but may be conducive to development in the future. The potentially irrigable lands are summarized in Table 19 and are depicted on maps of irrigated and potentially irrigable land presented in Part II. Table 19 - Summary of potentially irrigable land-1965 (Unit--1,000 acres) Hydrologic Nonirri- Subregion Potentially irrigable land gable and State Class 1 Class 2 Class 3 Class 4 Total Class 6 Green River Wyoming 70.1 282.8 176.8 175.9 705.6 12,348.1 Utah 50.8 237.7 158.4 82.9 529.8 10,070.2 Colorado 46.3 392.4 260.8 177.2 876.7 5,758.5 Subtotal 167.2 912.9 596.0 436.0 2,112.1 28,176.8 Upper Main Stem Colorado 47.0 400.7 320.8 174.2 942.7 12,575.3 Utah 11.4 102.2 56.7 56.7 227.0 2,337.1 Subtotal 58.4 502.9 377.5 230.9 1,169.7 14,912.4 San Juan-Colorado Arizona 40.6 221.4 251.0 148.6 661.6 3.749.0 Colorado 12.3 115. T 75.3 42.1 245.4 3,269.1 New Mexico 70.3 773.8 1,034.8 589.7 2,468.6 3,696.2 Utah 26.4 174.2 140.5 60.I 401.2 9,749.7 Subtotal 149.6 1,285.1 1,501.6 840.5 3,776.8 20,464.0 Region by States Wyoming 70.1 282.8 176.8 175-9 705.6 12,348.1 Utah 88.6 514.1 355.6 199.7 1,158.0 22,157.0 Colorado 105.6 908.8 656.9 393.5 2,064.8 21,602.9 Arizona 40.6 221.4 251.0 148.6 661.6 3,749.0 New Mexico 70.3 773.8 1,034.8 589.7 2,468.6 3,696.2 Total 375.2 2,700.9 2,475.1 1,507.4 7,058.6 63,553.2 55 |