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• III II111111111111N • <br />999 <br />EXHIBIT G <br />WATER RESOURCES <br />The Mesa Gravel Pit is located approximately 4.5 miles southeast of Hayden, Colorado in <br />Routt County. The site is located 0.8 miles south of Highway 40, 0.7 miles west of <br />Twenty-Mile Road, and 3 miles northwest of the Seneca II Mine. The surface of the <br />Permit Area slopes at a low angle generally to the north. Surface relief is approximately <br />70 feet. The eastern portion of the permit area is drained by an unnamed ephemeral <br />stream that is tributary to Sage Creek. Sage Creek joins the Yampa River about 1.5 <br />miles to the northwest of the permit area. The western portion of the permit area is <br />drained by an ephemeral stream that is part of the Hutchinson Gulch drainage. <br />Hutchinson Gulch joins the Yampa River about 2.5 miles north of the Permit Area. <br />The gravel deposit to be mined is an elevated terrace well above the current level of the <br />Yampa River. There is an average of about 20 inches of topsoil and about 6 feet of sand <br />and sandy clay overburden overlying the gravel deposit. The gravel deposit ranges from <br />• 7 to over 20 feet in thickness. Underlying the gravel deposit are shales of the Cretaceous <br />Lewis Formation. These shales, as identified in drillhole logs, are high in clay content and <br />appear to be of low permeability as evidenced by their sticky and slightly plastic <br />consistency when wet. <br />Exhibit G-1 illustrates the location of adjudicated water resource feature within and <br />adjacent to the permit area as of July 1, 1981. Table G-1 identifies all these water <br />resource features. Table G-1A updates the water rights listing though March 3, 1998. <br />Water sources in the mine vicinity are principally springs, although there is one <br />adjudicated water supply well located in the SE1/4 of Section 18 (T6N, R87W). The <br />Mesa gravel well located in the NW1/4 SE1/4 of Section 18 is not adjudicated. As <br />indicated in Table G-1, there are several reservoirs and one ditch in the general vicinity of <br />the Permit Area. The only water rights within the Permit Area are for Spring A and Spring <br />B (Map Numbers 16 and 17) located on Hutchinson Gulch and the Mesa Gravel Pit <br />sedimentation pond located on the unnamed tributary of Sage Creek. These springs are <br />located outside of the area to be mined. <br />r1 <br />ILJ <br />G-1 Revised May 1998 <br />