2015-01-12_REVISION - M1980183 (4)

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RECEIVED DNR COLORADO Al■CO Division of Water Resources JAN 20 5 Department of Natural Resources DIVISION OF RECLAMATION 1313 Sherman Street, Room 821 MINING AND SAFETY Denver, CO 80203 Response to Reclamation Permit Application Amendment Consideration DATE: January 12, 2015 TO: Tyler V. O'Donnell, Environmental Protection Specialist CC: Division 1 Office, District 2 Water Commissioner FROM: loana Comaniciu, P.E. RE: Pit 29, Permit No. M-1980-183 Operator: Brannan Sand and Gravel Contact: Brannan Sand and Gravel - 303-534-1231 Section 35, Twp 1 South, Rng 67 West, 6th P.M., Adams County CONDITIONS FOR APPROVAL Brannan Sand and Gravel requested an amendment to the application for Pit 29, Permit no. M1980-183. The purpose of this amendment is to mitigate ground water mounding on the Einspahr property located immediately to the south of the north cell of Pit 29. The plan has been designed to reestablish the ground water levels that existed prior to mining. A French drain is proposed to be installed on the upgradient (south) side of Pit 29 at the Einspahr property. The French drain will begin in the northeast corner of the Einspahr property, continue down gradient west to a maintenance manhole at the northwest corner of the Einspahr property, than continue approximately 1200 feet along the west side of Pit 29. The beginning and ending elevations of the drain will coincide with the estimated pre-mining water levels. Prior to the construction of the French drain the operator is required to submit to the State Engineer's Office a Notice of Intent to Construct a Dewatering Well (Form GWS-62). All ground water pumped from the French drain (dewatering well) shall not be used for any beneficial purposes and must be discharge to the stream system without consumptive use, including evaporation losses. The operator will need to obtain a well permit if the French drain (dewatering well) will be in place for more than one year after construction. Upon completion of the ground water mitigation on the Einspahr property, the operator must plugged the French drain in accordance with Rule 16 of the Water Well Construction Rules. The applicant may contact the State Engineer's Office with any questions. '4',_ , , 1313 Sherman Street, Room 821, Denver, CO 80203 P 303.866.3581 F 303.866.3585 www.water.state.co.us I R . . ' ih7■;