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DEPARTMENT OF NATURAL RESOURCES <br />DIVISION OF WATER RESOURCES <br />DEERE & AULT CONSULTANTS, INC <br />MIKE LANDERS <br />COLBY HAYDEN, P.E. <br />600 S. AIRPORT ROAD, BLDG A, STE 205 <br />LONGMONT, CO 80503 <br />RE: SLURRY WALL LINER APPROVAL <br />HILL - OAKLEY RESERVOIR (FORT LUPTON SAND & GRAVEL PIT PHASE ID) <br />DRMS M- 1999 -120, WDID 0203040 <br />NENW S30- T2N -R66W, WATER DIVISION 1, WATER DISTRICT 2 <br />Dear Mike and. Colby: <br />The purpose of this letter is to approve the lining of the Hill- Oakley Reservoir. The <br />Reservoir is located primarily in the NE%% of the NW %, of Section 30, Township 2 North, <br />Range 66 West of the Sixth Principal Meridian and is Phase III of the Fort Lupton Sand & <br />Gravel Pit (DRMS M- 1999 -120). The slurry wall liner test commenced January 3, 2011 and <br />concluded on July 6, 2011. A site inspection was performed by our office on July 13, 2011 <br />to review site conditions and the leak test plan. <br />Your report dated July 27, 2011 provides the liner summary and leak test result. The test <br />data provided indicates that the pit has been lined to the performance standard <br />referenced in the August 1999 State Engineer Guidelines for Lining Criteria for Gravel Pits <br />(1999 SEO Guidelines). Meeting the performance standard requires that all water <br />inflows and outflows for the liner perimeter enclosed area must be accounted for on <br />a weekly basis. <br />With this liner approval, Hill- Oakley Reservoir may be used to store water in accordance <br />with the 1999 SEO Guidelines. Prior to ANY use of this site, the owner or operator will <br />need to coordinate with the District 2 Water Commissioner to review operations and <br />accounting. <br />Please contact me at the number below if you have any questions. <br />Sincerely, <br />Jonathan M. Hernandez, P.E. <br />Water Resource Engineer <br />ec: Joanna Williams, Denver SEO <br />WDID (0203040) <br />August 2, 2011 <br />Water Division 1 • Greeley <br />810 9th Street, Suite 200 • Greeley, CO 80631 • Phone: 970 - 352 -8712 • Fax: 970 -392 -1816 <br />http://water.state.co.us <br />John W. Hickenlooper <br />Governor <br />Mike King <br />Executive Director <br />Dick Wolfe, P.E. <br />Director State Engineer <br />David L. Nettles, P.E. <br />Division Engineer <br />