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<br />I <br />I- <br />I- <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />3738 <br /> <br />References to salt loading in the Colorado River Basin <br />appear in a variety of literature beyond those discussed above. <br />Most of this literature, however, relies on previously discussed <br />investigations conducted by the USGS, EPA, BLM, BuRec, and SCS. <br /> <br />YAMPA SUBBASIN <br /> <br />The Yampa River Basin is located in northwest Colorado and <br />south-central Wyoming. The basin land area is approximately <br />9,530 square miles, 6,719 of which is in Colorado. The Red <br />Desert Basin forms the northern boundary, the Continental Divide <br />the eastern boundary, the White-Yampa divide forms the southern <br />boundary, and the ColoradO-Utah state line is the western <br />boundary. Elevations range from 5,000 to more than 12,000 feet <br />above sea level. <br /> <br />Approximately 6% of the land in the basin is used for crop <br />prOduction. The remaining 94% is used for grazing, timber <br />production, watershed, recreation, wildlife, and other purposes. <br />The average irrigated acreage during the 1943-60 periOd was <br />96,500. The 1980 population was approximately 26,500. <br /> <br />None of the salt loading by source investigations on the <br />Yampa River Basin have attempted to separate Colorado and Wyoming <br />contributions to the Little Snake River, the major tributary to <br />the Yampa. For this reason, salt loading estimates include <br />contributions from Wyoming sources. When considering only <br />Colorado sources of salt loading to the Yampa River Basin, slight <br />adjustments must be made to basinwide estimates presented <br />hereinafter. <br /> <br />-6- <br />