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DEPARTMENT OF NATURAL RESOURCES <br />DIVISION OF WATER RESOURCES <br /> <br />Bill Ritter, Jr. <br />Governor <br />July 31, 2008 Harris D. Sherman <br />Executive Director <br />Dick Wolfe, P.E. <br />Director <br />Mr. Andy Rodriguez, P.E. <br />C I U Civil Resources, LLC <br />323 Fifth Street <br />P.O. Box 680 <br />Frederick, CO 80530 <br />Re: Baseline Resource Aggregate Mine, Substitute Water Supply Plan (WDID 0202583) <br />Division of Reclamation, Mining and Safety File No. M-197-058 <br />Section 36, T1 N, R67W, 6th P.M., Adams County ? <br />Water Division 1, Water District 2 RECEIVED <br />Approval Period: January 1, 2008 through December 31, 2008 JUL 3 1 2008 <br />Contact phone number for Mr. Andy Rodriguez: 303-833-1416 <br />Division of Reclamation, <br />Dear Mr. Rodriguez: Mining and Safety <br />We have received your letter of May 6, 2008, requesting amendment of the above <br />referenced substitute water supply plan ("SWSP") to cover depletions caused by an existing <br />gravel mining operation operated by Hall Irwin ("Applicant"). The plan was previously approved on <br />January 14, 2008. Revisions to the approved plan are being submitted to reflect Hall-Irwin's <br />proposed changes in operation for the site in 2008. In addition, one-half of the aggregate <br />production that was previously approved will occur on the adjacent Parker-Dersham site, for which <br />a separate SWSP was obtained. The required fee of $257.00 for the amendment of this substitute <br />supply plan has been submitted (receipt no. 3628852). <br />Plan Operation <br />The Baseline Resources mining area is split into two adjacent sites. The East site is <br />encompassed by an existing slurry wall, and is known as Robert W. Walker Reservoir (WDID <br />0203358), while the West site is located outside of the wall, as shown in attached figure 1. For <br />2008 all mining will occur outside of the slurry wall. Operations at the site are expected to occur <br />during nine months of the year from March through November. The applicant has obtained well <br />permit no. 66959-F for the mining operation (WDID 0203017). <br />The applicant will dewater the active mining area to allow for dry mining. The <br />dewatering water will be conveyed through dewatering trenches to a 7.18 acre settling pond <br />An alluvial well has been constructed to provide water for concrete batching and dust <br />suppression. This well is currently permitted under well permit no. 66961-F (WDID 0210141) <br />and is located outside the boundaries of the slurry wall. In addition to providing 1.66 acre-feet <br />Office ?fthf, State Engineer <br />1313 Sherman Street, Suite 818 • Denver, CO 80203 • Phone: 303-866-3581 • Fax: 303-866-3589 <br />www.water.state.co.us