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III IIIIIIIIIIIII III STATE OF COLORADO OFFICE OF THE STATE ENGINEER Division of Water Resources Department of Natural Resources 1313 Sherman Street, Room BIB - Denver, Colorado 80203 Phone: 13031 866-3581 FAX: 1303) 866-3589 http!/water state.co.us/de(aulLhtm Richard T. Raines Tuttle Applegate, Inc. 11990 Grant Street, Suite 304 Denver, Colorado 80233 March 8, 2001 RE: Rich Pit Substitute Water Supply Plan, M-85-218 SE'/. Sec. 34, T20S, R63W, 6`h P.M. NW'/. Sec. 2, T21S, R63W, 6`" P.M. Well Permit no. 45995-F Water Division 2, Water District 14 Dear Mr. Raines: pF Cpl ~~ ~~ a • ~ rBl6 Bill Owens Governor Greg E. Walther Executive Director Hal D Simpson. P.E. Slane Engineer RECEIVED APR 12 2001 Division of Minerals end G~slopy We have reviewed your February 19, 2001 request for a renewal of the Rich Pit substitute water supply plan on behalf of Western Mobile Southern, Inc., a subsidiary of Lafarge Corporation. The current plan was last approved on May 18, 2000 and carries an expiration date of March 31, 2001. The required $217 fee has been paid. According to the renewal request, mining activities at the Rich Pit are inactive, and there have been no changes since the previous request for renewal of this substitute supply plan. This renewal will cover evaporation losses off of the 5 excavations identified in the previous substitute supply plan that are within the Division of Mines and Geology (DMG) permitted area. These excavations expose a total of 15 acres of ground water. Description IDENT No. Size Location "Inactive" Pit 1406466 5 ac. NW1/4 Sec. 2 Previous "Active" Pit 1406470 8 ac. SE1/4 Sec. 34 2 Used Wash Ponds 1406469 1.8 ac. NE1/4 Sec. 33 Unused Wash Pond 1406011 0.2 ac. SE1/4 Sec. 33 The maximum estimated depletions from the operation total 52.1 acre-feet during the period April 1, 2001 through March 31, 2002, as shown on Table 1. There is no mining activity within the Rich Pit boundary, and so the plan provides for no losses due to concrete botching, water removal via gravel moisture, or pumping for dust suppression. The source of the replacement water is obtained by MAGUA through the Cherokee Metropolitan District wastewater treatment plant. Transit lasses are estimated to be 10 percent from the Cherokee Metropolitan District wastewater treatment plant to Fountain Creek, 1 percent on Fountain Creek to the Arkansas River, and 1 percent on the Arkansas. Table 1 summarizes monthly depletions and transit losses attributable the Rich Pit and required replacements. MAGUA will obtain 59.1 acre-feet of fully consumable water from the Cherokee Metropolitan District by MAGUA. This is expected to cover both depletions and transit losses.