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iii iiiiiiiiiiiii iii <br />999 <br />• EXHIBIT G <br />WATER RESOURCES <br />The Mesa Gravel Pit is located approximately 4.5 miles southeast of Hayden, <br />Colorado in Routt County. The site is located 0.8 miles south of Highway 40 <br />and 0.7 miles west of Twenty-Mile Road, 3 miles northwest of the Seneca II <br />Mine. The surface of the permit area slopes at a low angle generally to the <br />north. Surface relief is approximately 70 feet. The eastern portion of the <br />permit area is drained by an unnamed ephemeral stream that is tributary to <br />Sage Creek. Sage Creek confluences with the Yampa River about I.S miles <br />to the northwest of the permit area. The western portion of the permit area <br />is drained by an ephemeral stream that is part of the Hutchinson Gulch <br />drainage. Hutchinson Gulch confluences with the Yampa River about 2.5 <br />miles north of the permit area. <br />The gravel deposit to be mined occurs in a terrace of the Yampa River. <br />There is an average of about 20 inches of topsoil and about 6 feet of sand <br />• and sandy clay overlying the gravel deposit. The gravel deposit ranges <br />between 6 and 13 feet in thickness. Underlying the gravel deposit are shales <br />of the Cretaceous Lewis Formation. These shales, as identified in drill hole <br />logs, are high in clay content and appear to be of low permeability as evi- <br />denced by their sticky and slightly plastic consistency when wet. <br />Exhibit G-I illustrates the location of adjudicated water resource features <br />within and adjacent to the permit area. Table G-I identifies all these water <br />resource features. Water sources in the mine vicinity are principally springs; <br />there is one adjudicated water supply well located in the SE9o of Section 18 <br />(T6N, R87W). The Mesa Gravel well located in the NWYb SE9a of Section 18 is <br />not adjudicated. As indicated in Table G-I, there are several reservoirs and <br />one ditch within the permit area vicinity. The only water rights within the <br />permit area are for Spring A and Spring B (Map Numbers 16 and 17) located <br />on Hutchinson Gulch and the Mesa Gravel Pit sedimentation pond located in <br />the unnamed tributary of Sage Creek. These springs are located outside of <br />the area to be mined. <br />l J <br />G- I <br />