2011-09-20_HYDROLOGY - M1985218 - Laserfiche WebLink

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s p byvi DEPARTMENT OF NATURAL RESOURCES S W S P DIVISION OF WATER RESOURCES September 19, 2011 Jared Dains, E.I. �pplegate Group, Inc. 1499 W. 120 Avenue, Suite 200 Denver, CO 80234 -2759 f RE: Rich Pit Substitute Water Supply Plan, M -85 -218 /4 SE Sec. 34, T20S, R63W, 6 P.M. NW1/4 Sec. 2, T21S, R63W, 6 P.M. Water Division 2, Water District 14 DEPLETIONS Approval Period: April 1, 2011 - March 31, 2012 Dear Mr. Dains: PLAN OPERATION Description IDENT No. Location Inactive Pit 1406466 NW1 /4 Sec. 2 Active Pit 1406470 SE1 /4 Sec. 34 Old Aggregate Sales Area 1406469 NE1 /4 Sec. 33 Unused Wash Pond 1406011 SE1 /4 Sec. 33 Well Permit No. 66042 -F 1405128 NE1 /4 Sec. 33 Office of the State "Engineer 1313 Sherman Street, Suite 818 • Denver, CO 80203 • Phone: 303 - 866 -3581 • Fax: 303 - 866 -3589 http: / /water. state.co.us John W. Hickenlooper Governor Mike King Executive Director Dick Wolfe, P.E. Director /State Engineer ✓`P Division of nation, We have received your March 4, 2011 request for renewal and amendment of the Rich Pit substitute water supply plan on behalf of Lafarge West, Inc (Lafarge). The required $257 fee has been paid (receipt number 3649325 dated March 4, 2011). The Rich Pit has been inactive since 2001 and will remain inactive during this plan year. Ponds created from previous mining activities under this plan cause stream depletions during the inactive period due to evaporation. This renewal covers pond evaporation from the Active Pit (16.7 exposed acres) and the Unused Wash Pond (0.5 acres), as well as the pumping of a sanitary/miscellaneous well. Permit No. 45995 -F (Well ID 1406466) was issued for the pit for exposure of groundwater, dust suppression, product retention, and concrete batching. A well, Permit No. 66042 -F (well ID 1405128), is used for sanitary and miscellaneous purposes. During this plan year, the site excavations may expose a maximum total of 17.2 acres of ground water. You have submitted an analysis that shows the calculated evaporation, effective precipitation, and resultant net replacement obligation in the attached Tables 1 and 2. You have also performed a depletion analysis based upon the net replacement obligation and the aquifer characteristics to show the lagged depletion schedule to the Arkansas River, as presented in that attached Table 3. The total lagged depletions for this plan year are estimated to be 59.13 acre -feet (56.4 acre -feet from the Active Pit, 1.73 acre -feet from the Unused Wash Pond, and 1