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AVCOLORADO <br />Division of Water Resources <br />Department of Natural Resources <br />1313 Sherman Street, Room 821 <br />Denver, CO 80203 <br />Response to Reclamation Permit Amendment Application Consideration <br />DATE: April 29, 2014 RECFfV7e" <br />TO: Michael A. Cunningham, Environmental Protection Specialist <br />CC: Division 1 Office, District 5 Water Commissioner MAY 0 ! <br />Division n, viucir� dUk;;. <br />FROM: Sarah Brucker, P.E. c�/ S� Mining & Safety <br />RE: Cemex Sandstone Quarry (formerly Cemex Silica Quarry), File No. M- 1977 -361 <br />Operator: Cemex, Inc. <br />Contact: Bradley S. Wilson, (303) 823 -2100 <br />Section 20, Twp 3 North, Rng 70 West, 6th P.M., Boulder County <br />CONDITIONS FOR APPROVAL <br />® The proposed operation does not anticipate exposing groundwater. Therefore, exposure of <br />ground water must not occur during or after mining operations. <br />• The proposed operation may have potential impact on existing water rights near the project <br />Location. The proposed project shall not alter or impact the historic operation of existing water <br />rights. <br />• The applicant has not identified any proposed use of water at the permit site. If water will be <br />used for any purpose at this site, the applicant will need to document that the water was <br />obtained from a legal source, or the water was diverted in priority under a water right decreed <br />for such industrial use. <br />COMMENTS: The application seeks an amendment to update the mining and reclamation plans, update <br />the post- mining land use from agricultural to wildlife habitat, and clarify the mining boundary for an <br />existing surface mining operation on 9.99 permitted acres near Lyons, Colorado. The primary commodity <br />to be mined at the site is sandstone. <br />The South Ledge Ditch (WDID 0500520) crosses the eastern portion of the mined area. The proposed <br />mining operation is not expected to directly affect the South Ledge Ditch. <br />If stormwater runoff is intercepted by this mining operation and is not diverted or captured in priority, it <br />must be released to the stream system within 72 hours, which may require a discharge permit from <br />CDPHE -WQCD. Otherwise, the operator will need to make replacements for evaporation. <br />The applicant may contact the State Engineer's Office with any questions. <br />1313 Sherman Street, Room 821, Denver, CO 80203 P 303.866.3581 F 555.555.5555 www.water.state.co.us <br />%aY <br />a <br />7" �/ <br />