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RECEIVED <br /> Applegate FEB 0 8 2021 <br /> Group, 1... <br /> QM310 Nl OF 1ZECLA1N,4"1ON <br /> Water Resource Advisors for the West 1M1l NPj nAMD SAFETY <br /> February 1, 2021 <br /> Mr. Daniel Cunningham <br /> Environmental Protection Specialist <br /> Colorado Division of Reclamation, Mining, and Safety <br /> 1313 Sherman St., Room 215 <br /> Denver, CO 80203 <br /> RE: North Weld Gravel Pit,M-1976-018,Amendment 01, Adequacy Review Comments <br /> Dear Daniel: <br /> The purpose of this letter is to respond to the comments you provided in your December 11, 2020 <br /> Adequacy Review for the North Weld Gravel Pit 112c Construction Materials Amendment <br /> Application, M-1976-018. The responses are formatted to match the order of the comments <br /> received. <br /> General Questions <br /> 1. Exhibit B and C maps updated to include the name of the applicant and signed and <br /> stamped by the PE who prepared the maps are attached. <br /> 2. C&H Solutions is in the process of preparing and submitting a succession of operator <br /> application for the North Weld Gravel Pit. <br /> Rule 6.4.3 Exhibit C—Maps <br /> 3. Exhibit C maps updated with a buffer zone of 200 feet along the boundary of the mining <br /> site are attached. <br /> 4. The mining site boundaries are shown on the Exhibit C maps. Topsoil and Overburden will <br /> be stored around these mining site boundaries and will be placed back during the <br /> reclamation phase. <br /> Rule 6.4.4 Exhibit D—Mining Plans <br /> 5. The Pierce Lateral is unlined and seepage from the ditch already occurs. Mining adjacent <br /> to the Pierce Lateral (at a distance of at least 50 feet away) is not expected to cause an <br /> increase in the existing seepage rate. Also, as mentioned in the application, whenever <br /> groundwater is encountered during mining,including adjacent to the Pierce Lateral,mining <br /> will cease and the floor will be backfilled to at least 2 feet above the prevailing water table. <br /> Therefore, seepage is not expected to be an issue for the mine. <br /> 6. At any given time,the C&H Solutions is planning on having no more than 125 acres open <br /> for mining or under reclamation. <br /> www.applegategroup.com Denver • Glenwood Springs • Hotchkiss (303)452-6611 <br />