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eol More detailed geologic information, including geologic maps and a generalized geologic cross-section, can be found in Tab 6 of the permit application. The HG Loadout is located in the Dry Creek drainage approximately two miles north of the Williams Fork Mountains. The permit azea is underlain by the Lewis shale, <t predominantly dazk-gray to bluish, marine shale of Cretaceous age. The Lewis shale dips a few degrees generally northwazd into the Sand Wash Basin. The shale beds have weathered out to form gently sloping hillsides on either side of the neazly level alluvial valley floors and terraces found along Dry Creek. Surface waters do not appeaz to be in hydrologic communication with the Twentymile Sandstone, a significant regional aquifer which underlies the Lewis shale. Grouttd water movement is described below and in Tabs 7, 14 and 15 of the permit application. X215 Soils in the Dry Creek azea range from clays to loams. The soils aze of limited agricultural use due to high concentrations of sodium and salt. Information on s~~ils can be found in Tabs 9 and 19 of the permit application. Specific findings related to soils aze described in Section B, Item N of this document. .More detailed climatic information can be found in Tab 8 of the permit application. The region is chazacterized by a semi-arid steppe climatic regime with cold winters and mild to cool summers. The prevailing wind is from the northwest (reversing at night due to southeasterly upslope winds). Average annual precipitation is 16 inches and the growing season in the region is approximately 94 days. Climatic information w<ts collected from both Hayden Station, one mile away, and the Seneca II-W Mine, six miles south of the Loadout. Surface Water Hydrology Surface water information is found in the following sections of the permit application: Tabs 7, 12, 13, 14, 15 and ] 6 and Exhibits 12-2, 12-3, and 12-4. A summary of this information is included here, below in the Description of the Operations Plan and in Section B, Item III of this document. Most of the permit azea drains to Dry Creek. A small, noRhem portion of the railroad loop drains directly into the Yampa River. Dry Creek flows into the Yampa River neaz the town of Hayden. Stokes Gulch, an intermittent stream. flows into Dry Cree}:just south of the rail Loadout.