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A <br /> AMERICAN <br /> GYPSUM <br /> October 30, 2018 :7,7:77.7D <br /> NOV VLU <br /> Division of Reclamation, Mining and Safety <br /> 1313 Sherman Street <br /> Room 215 <br /> Denver, Colorado 80203 <br /> Attn: Stephanie Marshall <br /> Please find enclosed a Request for Technical Revision (TR) Cover Sheet, technical <br /> memorandum and final design drawings. A check for the required fee was sent directly to the <br /> Denver office. The TR includes the construction of a new section of access road to reach lower <br /> levels of the Upper Pit at the Eagle-Gypsum Mine, CDRMS Permit M-1984-041, in Eagle County. <br /> Details of the TR are included in the attachments mentioned above and a detailed list of the <br /> attachments can be found below. American Gypsum is requesting that CDRMS review this project <br /> as soon as possible. <br /> Except those updates listed above, and in the attached plan and profile sheets, the Eagle- <br /> Gypsum Mine will continue to follow the stipulations outlined in the original approval. <br /> Sincerely, <br /> !'�-3(-►z ► lam ? TTc( L <br /> Jon Edeen <br /> Mine Superintendent <br /> Attachments: <br /> A. Request for Technical Revision(TR) Cover Sheet <br /> B. Construction Drawings <br /> C. Geotechnical Laboratory Test Results <br /> D. Slope Stability Output <br /> E. Drainage Basin and Soils Map <br /> F. Culvert and Diversion Sizing Support <br /> G. Sediment Pond Sizing Support <br /> H. Post-Mining Reclamation Plan <br /> American Gypsum Company—740 Highway 6—PO BOX 980—Gypsum,CO 81637—Mine Office 970-524-8121 <br />