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<br />N <br />w::o. <br />o <br />CO <br /> <br />sediment, and salt content, soil "types, vegetation communities, <br /> <br />climate, range condition and trends, location and extent of <br />livestock forage removal, and effects of livestock trampling <br />on soils, <br /> <br />The U,S. Geological Survey (GS) has completed a 1978-79 <br /> <br />winter study of the contribution by groundwater to salinity <br />of the Colorado River mainstream and the Green River, and <br /> <br />their tributaries. The important data and conclusions <br /> <br />reached are being compiled into a report which sould be <br />available for distribution late in F.Y. 1980. <br /> <br />The BLM is continuing to develop Grazing Environmental <br /> <br /> <br />Statements (ES) dealing with the effects of livestock grazing <br /> <br />on natural resources. Each ES should discuss the need for <br /> <br />systematically rotating livestock grazing to meet objectives <br />such as improving forage for livestock and wildlife, improving <br />watershed conditions, and reducing erosion and salt concentra- <br />tions in surface runoff. After ES's are prepared, Allotment <br />Management Plans (AMP) are written, An allotment is an indi- <br />vidual rangeland area controlled by a single or group of <br /> <br />ranchers. AMP's contain a schedule for grazing livestock <br /> <br />that will be specifically designed to meet the needs of <br /> <br />resources on the allotment, In Wyoming, AMP's being prepared <br /> <br /> <br />in 1980 will include grazing systems designed to reduce ero- <br /> <br /> <br />sion and salinity on saline lands. <br /> <br />USDA Rural Clean Water Program <br /> <br /> <br />The Rural Clean Water Program was established under <br /> <br /> <br />provisions of Section 208 (j) of the Clean \Vater Act. The <br /> <br />17 <br /> <br />t, ..,lit <br />