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Please refer to the Mining Plan Map in Exhibit C for phase areas to be mined, <br />locations and areas. <br />(f) Use Mining Plan Map in conjunction with narrative to present: <br />(i.) Nature, depth and thickness of the deposit and thickness and type of <br />overburden to be removed <br />The operator has drilled soils test borings around the mining area, and has operated <br />the adjacent Baseline Resource site for several years. The locations of the soils <br />borings are shown on the attached Mining Plan Map in Exhibit C. Please refer to the <br />soils information included in Exhibit I of this application. <br />Topsoil & Overburden: Based on soils boring information, the topsoil is <br />approximately 6 inches in depth and will be stockpiled separately from overburden and <br />other spoil. The overburden is estimated to range in depth and will also be stockpiled <br />separately. Please refer to Exhibit I for borings information by Tetra Tech RMC that <br />describes the topsoil and overburden type. <br />Sand and Gravel: Based on soils boring information, the sand and gravel resource is <br />an alluvial deposit that ranges in thickness from approximately 20 to 40 feet, averaging <br />approximately 30 feet. Refer to the attached boring information in Exhibit I for further <br />details. <br />(ii.) Nature of the stratum immediately beneath the material to be mined in <br />sedimentary deposits <br />The stratum immediately beneath the sand and gravel deposit is claystone with <br />lenses of siltsone and sandstone bedrock of the Denver and Arapahoe Formations. <br />(g) Identify the primary and secondary commodities to be mined/extracted and <br />describe the intended use. <br />The primary commodities are sand, gravel and fill; intended for construction materials. <br />(h) Name and describe the intended use of all expected incidental products to be <br />mined/extracted bythe proposed operation. <br />There are no expected incidental products to be mined. <br />(i) Specify if explosives will be used in conjunction with the mining (or reclamation) <br />No explosive material will be used on-site. <br />Hall-Irwin Corporation -Parker/Dersham Sand and Gravel Resource - MLRB 112 Permit Application <br />Exhibit D - 4 <br />