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<br />DEPARTMENT OF NATURAL RESOURCES <br />DIVISION OF WATER RESOURCES <br />k. <br />Bill Ritter, Jr. <br />Governor <br />Mike King <br />Executive Director <br />Dick Wolfe, P.E. <br />June 30, 2010 Director/State Engineer <br />Mr. Christopher H. Weber <br />Bishop-Brogden Associates, Inc. <br />333 West Hampden Ave., Ste 1050 <br />Englewood, CO 80110 <br />RE: Transit Mix Concrete Co. (Gr enti Farms) Pit <br />DMG File No. M-2001-005 ? <br />Sec. 13, T19S, R69W, 6th P.M. <br />Water Division 2, Water District 12 <br />ct <br />Dear Mr. Weber: <br />h 1, 2010 th <br />303-806-8952 <br />We have reviewed your January 5, 2010 request for a substitute water supply plan on <br />behalf of Transit Mix Concrete Company. The required $257 fee has been received. The most <br />recent approval for a substitute water supply plan ("SWSP") is dated May 10, 2004. A well permit <br />has been issued for this gravel pit (well permit number 61403-F). This SWSP request was <br />submitted according to C.R.S. § 37-90-137(11). <br />PLAN OPERATION <br />Transit Mix has a lease agreement with the Grisenti's to mine sand and gravel from about <br />100 acres of land along the Arkansas River east of Florence. The recently completed Phase 1 <br />mining operation covered 35 acres. The Phase 1 pit was filled with water by an administrative <br />exchange during December 2009 resulting in a 19 acre pond whose surface is in equilibrium with <br />the water table. The Phase 1 pond will serve as the settling pond for the Phase 2 operation that is <br />currently underway. The attached Figure 2 shows the project phases. <br />DEPLETIONS <br />The depletions of this operation consists of 57.66 acre-feet of evaporative loss from the 19 <br />acre exposed surface of the Phase 1 pit, 7.65 acre-feet of water removed via 260,000 tons mined <br />product (4% loss by weight), and 5.01 acre-feet pumped for dust suppression. The pit will be <br />located less than 100 feet from the Arkansas River, and so the depletions are considered to be <br />instantaneous. A monthly breakdown of these amounts is given in Table 1, attached. Total <br />depletions from mining activities are estimated to be 70.33 acre-feet for the 2010-2011 accounting <br />year. <br />RECFI EEN <br />Office of the State Engineer 3 Q 2010 <br />1313 Sherman Street, Suite 818 • Denver, CO 80203 • Phone: 303-866-3581 • Fax: 303-866-3589 JUN www.watenstate.co.us oivisinri c?: riauNnano , <br />Mining and SafetY