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It is suitable for livestock watering and irrigation of salt-tolerant crops grown in well drained soils. Water quality in Sage Creek is a CaMg-HCO, type. Samples from baseline monitoring points indicate the water is slightly alkaline with a pH ranging between 7.0 and 8.0. The water has a TDS level of less than 500 mg/1, but is characterized as very hard. It is suitable for livestock and irrigation, however, flow is generally inadequate for irrigation. Dry Creek water quality is categorized as brackish, since TDS averages greater than 1000 mg/1 (1048 mg/1) near the confluence with Hubberson Gulch. Water quality degrades further downstream. With an average pH of 8.3, the water is slightly alkaline. Hardness averages 796 mg/1, and is considered very hard. Climate The average annual precipitation at the mine site is approximately 16 inches. The precipitation is consistent throughout the year with no significant dry periods. The mean annual temperature is 42°F. The average maximum and minimum temperatures are 66°F and 17°F respectively. Regionally, wind directions run east-west following the Yampa River Valley. More localized wind patterns trend along the side valleys. Land Use The current and historic land use of the area in which the operation is located is grazing land for livestock and habitat for wildlife. Regional land use patterns are oriented in three relatively distinct bands. Irrigated cropland is closely associated with the floodplain of the Yampa River. To the south, non-irrigated crops are grown on the sloping upland surfaces. The area nearest the mining operation is mostly hilly and mountainous terrain and used primarily as rangeland for livestock grazing and wildlife habitat. Soils The soils found within and adjacent to [he mine plan area are typical of soils found in the cold, semi-arid regions of the Western United States. The soils are generally moderately deep (20 to 40 inches) to shallow (10 to 20 inches) and have developed in weathered, interbedded fine sandstone, siltstone, and shale, and in local slope wash and colluvium. Most of the soils are Borollic Vertic Camborthids, Lithic Cryoborolls, and Pachic Cryoborolls. Most of the soil types found in the mine plan area contain at least six inches of suitable topsoil material. The best sources of topsoil material are the Splitro silt loam, the Winevada Loam, and the Cochetopa Loam, which comprise significant portions of the area to be disturbed. Salvage depths vary from 6 to 64 inches, resulting in an overall average soil replacement depth of 1.3 feet (15.6 inches) over regraded areas in the original permit area. Average soil replacement Seneca II-W Findings Document 14 July 3, 2006 Permit Renewal No. 5