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(# Use Mining Plan Map in conjunction with narrative to present: <br />Nature, depth and thickness of the deposit and thickness and type of <br />overburden to be removed <br />Exploratory borings drilled by Northern Colorado Geotech (NCG, 2007) primarily <br />along the perimeter of the site, encountered approximately four to ten feet of <br />overburden topsoil, silty sands and sandy lean clays overlying approximately 23 <br />top 28 feet of sand and gravel on top of primarily claystone bedrock. Refer to <br />Figure 2 of the Stability Analysis (Exhibit S) for locations of the property extents <br />and boring locations. The bedrock depths in the proposed mine areas ranged <br />from approximately 22 feet to 27 feet below the ground surface. (Bedrock <br />contours are shown in Figure 3 of Exhibit S). <br />(ii.) Nature of the stratum immediately beneath the material to be mined in <br />sedimentary deposits <br />The site is located approximately 15 miles east of the foothills of the Colorado <br />Front Range on the western flank of the Denver Structural Basin. The basin is a <br />downwarp of sedimentary strata that tends north - northwest, parallel to the <br />mountain front. In the project area, the sedimentary bed dips gently eastward <br />toward the axis of the basin east of the site. Based on regional geologic mapping <br />(Colton, 1978), the near surface bedrock in the project area is the Paleocene and <br />Upper Cretaceous Denver and Arapahoe Formations. The bedrock is overlain by <br />upper Pleistocene and Holocene (Quarternary age) gravel deposits and eolian <br />(wind blown) overburden soils. The gravel deposits exist primarily within the <br />Broadway Alluvium deposit. The bedrock unit consists mainly of claystone and <br />may contain lenses of siltstone and sandstone. <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 by the 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 />Bestway Concrete & Aggregates — The Shores -Burch Property — MLRB 112 Permit Application <br />Exhibit D - 3 <br />