2015-12-29_PERMIT FILE - M2015045

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COLORADO Division of Water Resources Department of Natural Resources 1313 Sherman Street, Room 821 Denver, CO 80203 RECEIVED Oa; L. c lO15 DIVISION OF RECLAMATION' WINGAND SAFETY Response to Reclamation Permit Application Consideration DATE: December 28, 2015 TO: Eric C. Scott, Environmental Protection Specialist CC: Division 1 Office, District 1 Water Commissioner FROM: Sarah Brucker, P.E. RE: Peters 313 Pit, File Applicant/Operator: - • ounty Public Works Contact: Jay McDonald, (970) 304-6496 S'/2 SW IA Section 26, Twp 12 North, Rng 63 West, RECEOSik DEC 292015 DIVISiOli OF TION 00406111) WET( 6th P.M., Weld County CONDITIONS FOR APPROVAL • Exposure of ground water must not occur during or after mining operations. ® The applicant will need to document that any water used at the site was obtained from a legal source, or was diverted in priority under a water right decreed for such mining/industrial use. ® If stormwater runoff is intercepted by this operation and is not diverted or captured in priority, it must be released to the stream system within 72 hours; otherwise the operator will need to make replacements for evaporation. COMMENTS: The subject application is for a surface mining operation on 80 permitted acres approximately 5 miles west of Hereford, Colorado. The primary commodities to be mined at the site are sand and gravel. The site is proposed to be reclaimed to its present use of rangeland upon completion of this mining operation. The mining operation is not expected to directly affect surface or ground water systems. Previous test pitting at the site shows that the water table is more than 15 feet below ground surface and is not anticipated to be encountered during mining operations. In the event that mining exceeds 15 feet in depth, excavation is proposed to stay a minimum of 2 feet above ground water. Water requirements for mining and crushing operations and dust control at the site are estimated to be less than 4,000 gallons per month during operations. Water is proposed to be obtained and hauled from existing County -owned wells that have been decreed for dust control and industrial uses. Berms will be constructed around the perimeter of the site to retain onsite surface water runoff. A Colorado Department of Public Health and Environment Stormwater Construction Permit will be obtained prior to the start of mining operations. The applicant may contact the State Engineer's Office with any questions. 1313 Sherman Street, Room 821, Denver, CO 80203 P 303.866.3581 F 303.866.3585 www.water.state.co.us