2013-01-29_HYDROLOGY - M2000082 - Laserfiche WebLink

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Jared Dains Applegate Group, Inc. 1499 West 120 Avenue, Suite 200 Denver, CO 80234 -2759 DEPARTMENT OF NATURAL RESOURCES DIVISION OF WATER RESOURCES January 28, 2013 Re: East 8 Substitute Water Supply'PIan (WDID 0302562) East 8 Pit, DRMS Permit # M- 000 -082 (WDID 0303016) Section 10, T2N, R68W, 6 P.M. Water Division 1, Water District 5 Approval Period: November 1, 2012 through October 31, 2013 Contact phone number for Mr. Dains: 303 - 452 -6611 RECEIVED P5h John W. Hickenlooper Governor Mike King Executive Director JAN 2 9 2013 DIVISION OF RECLAMATION MINING AND SAFETY Dick Wolfe, P.E. Director /State Engineer Dear Mr. Dains: We have received your letter of November 12, 2012, requesting renewal of the above referenced substitute water supply plan to cover depletions caused by the gravel mining operation at East 8 Pit. The required fee of $257.00 for the renewal of this substitute supply plan has been submitted (receipt no. 3657768). The pit was most recently in Aggregate Industries Combined SWSP (WDID 0202565). With this SWSP approval the pit is removed from that combined SWSP and will be operated pursuant to this SWSP operated by Superior Oilfield Services. SWSP Operation Mining at the site has been on hold while Aggregate was the operator. Superior Oilfield Services ( "Superior" or "Applicant ") is in the process of succeeding Aggregate Industries as the operator of the site and thus operations will no longer be covered under Aggregates combined SWSP. Superior plans to begin dewatering activities starting November 2012 and mining activities starting December 2012. Depletions to be covered under this SWSP are from evaporation of exposed groundwater, and groundwater lost to mining operations and dust control. The City of Greeley is the owner of the site and as such is providing replacement water from their waste water treatment plant. The final reclamation plan is to create a lined storage reservoir for the City of Greeley. Depletions Evaporative losses will occur from exposed groundwater at the site. Due to past mining activities 5.8 acres of groundwater are currently exposed. All groundwater exposure is from mining activities that took place after December 31, 1980 and thus all evaporation must be replaced. Dewatering will occur in November 2012 such that by December 2012 only 1 acre of groundwater will be exposed for the remainder of the SWSP approval period. Using a net evaporative loss of 2.93 feet per exposed acre, as approved in the previous SWSP, the exposed groundwater will result in an evaporative loss of 3.42 acre -feet. Superior anticipates mining 138,000 tons of aggregate in WY 2013. The material will be in a dewatered state but washed and thus a 4% moisture loss is assumed on the mining production. This results in a groundwater loss of 4.06 acre -feet. The Applicant projects using 1.38 acre -feet per year for dust control operations. The total evaporative and operational losses will be 8.86 acre -feet during Office of the State Engineer 1313 Sherman Street, Suite 818 • Denver, CO 80203 • Phone: 303 -866 -3581 • Fax: 303 - 866 -3589 www.water.state.co.us