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4-30 <br />4.4.5 Present and Potential Uses of Proiect Area Soils <br />• 4.4.5.1 Crops and Pasture Land <br />The U.S. Department of Agriculture has identified farmlands of <br />national, state or local importance in Garfield County. These <br />farmlands are referred to as prime farmlands, farmlands of state- <br />wide importance and unique farmlands. The map of Important <br />Farmlands of Garfield County (USDA - SCS, and Colorado State <br />University Experiment Station 1979) does not delineate any prime <br />farmland on the site, but delineates the study area as "other <br />land." Other land is defined by the SCS as lands that do not <br />meet the criteria for prime or irrigated land. A negative deter- <br />mination for prime farmland was provided by the SCS, based on the <br />Garfield County Important Farmland D7ap, and the negative deter- <br />mination was made a part of the original permit application as <br />Appendix L (C-020-81). <br />Approximately 65 acres within the northern quarter of Section 29, <br />• adjacent to East Salt Creek, are used for irrigated pasture. <br />The following soils have the potential for irrigated use: Bill- <br />ings, Glendive, Haverson, Havre and Rivra (loam). These soils <br />are in the capability class 2, 3 or 4, and have subclass limita- <br />tions including erosion (e), soil limitations within the root <br />zone (s) and wetness (w). <br />Predicted yields for irrigated alfalfa hay production (ton/acre/ <br />year) are as follows: <br />Soil Alfalfa Hay <br />Series (Tons/Acre/Year) <br />Billings 6.0 <br />Glendive 5.0 <br />Haverson 5.0 <br />Havre 7.0 <br />Rivra 2.0 <br />Some soils within the addendum area have potential for dryland <br />• production, although none are presently used. Two soil series <br />