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(i.) Nature, depth and thickness of the deposit and thickness and type of overburden to be <br /> removed <br /> Overburden consists mainly of silty fine grain sand transitioning to sandy silt. Overburden <br /> thickness varied across the site from non-existent in the southwest comer to 15 feet thick <br /> in the southeast. <br /> The aggregate reserves at the site consist mainly of gravelly sand which grades to sandy <br /> gravel, usually becoming more gravelly with depth. Some cobble units(grain size 4"or <br /> greater)were encountered at the site; mainly consisting of a few feet overlaying bedrock. <br /> Aggregate unit thickness varied from 35 feet in BH-36 in the northern side of the site to <br /> 72.5 feet in BH-27 in the eastern side of the site. <br /> There is a large contiguous clay seam that encompasses almost the entire site. The clay <br /> seam varies from only 1 foot of thickness in the northwest to 23 feet of thickness in the <br /> southeast comer of the site. <br /> (ii.) Nature of the stratum immediately beneath the material to be mined in sedimentary <br /> deposits <br /> Depth to bedrock ranges from 39.5 feet in BH-38 in the northeast comer of the site to <br /> 97.5 feet in BH41 in the southeast comer of the site. The bedrock encountered at the <br /> site consists of wet brown weathered claystone in the first 6 inches to 1 foot which <br /> transitioned in to moist to dry,olive to grey claystone with further depth. <br /> (g) Identify the primary and secondary commodities to be mined(extracted and describe the <br /> 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 /> Gold may be extracted as an adjunct component of any wash equipment installed at the site. <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 /> U) Specify the dimensions of any existing or proposed roads that will be used for the <br /> mining operation. Describe any improvements necessary on existing roads and the <br /> specifications to be used in the construction of new roads. New or improved roads <br /> must be included as part of the affected lands and permitted acreage. Affected land <br /> shall not include off-site roads which existed prior to the date on which notice was <br /> given or permit application was made to the office and which were constructed for <br /> purposes unrelated to the proposed mining operation and which will not be <br /> substantially upgrades to support the mining operation. Describe any assocated <br /> drainage and runoff conveyance structures to include sufficient information to evaluate <br /> structure sizing. <br /> Section 20—Gravel Mine—MLRB 112 Permit Amendment <br /> Exhibit D-6 <br />