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i• <br />DEPARTMENT OF NATURAL RESOURCES <br />DIVISION OF WATER RESOURCES <br />ck"doom <br />Exetutiv 1 <br />�gg <br />6irector <br />Dick wove, P.E <br />December 16, 2011 Dire ter/StateEngineer <br />David L. Nettles, P.E. <br />Division Engineer <br />DEERE & AULT CONSULTANTS, INC. <br />DEREK H. FOSTER, P.E. <br />600 S. AIRPORT ROAD, BUILDING A, SUITE 205 <br />LONGMONT, CO 80503 <br />RE: SLURRY WALL LINER APPROVAL <br />KIRBY- D£RSHAM RESERVOIR, WDID 0203386 <br />PARKER- DERSHAM RESOURCE PIT, DRMS U- 2006 -003, WDID 0203026 <br />BASELINE RESOURCE PIT, DRMS M- 1997 -058, W6ID 0203017 <br />E% SE% 836 -TI N -R67W, WATER DIVISION 1, WATER DISTRICT 2 <br />Dear Derek: <br />The purpose of this letter is to approve the lining of the Kirby - Dersham Slurry Wall. The slurry wall is <br />generally located in the E% of the SE% of Section 36, Township 1 North, Range 67 West, abuts the <br />adjacent Robert Walker Reservoir (WDID 0203358) and is a part of the Parker- Dersham Resource <br />and Baseline Resource Gravel Pits The slurry wall liner test commenced May 22, 2011 and <br />concluded on September 8, 2011. A site inspection was performed by our office on September 8, <br />2011 to review site conditions and the leak test plan. <br />Your report dated December 12, 2011 provides the liner summary and 90 -day leak test result. The <br />test data provided indicates that the has hM IIn2d to the ftflgn etwWard referenced in the <br />August IM State Engineer Guldelki6i for Linlrg Criteria for Gravel Pits (1999 SEO Guidelines). <br />Meeting the design standard requires that all water Inflows and outflows for the liner perimeter <br />enclosed area must "be accounted for on a monthly basis. <br />With this liner approval, the Kirby- Dersham Reservoir may be used to store water in accordance with <br />the 1999 SEO Guidelines. Prior to ANY use of this site, the owner or operator will need to coordinate <br />with the District 2 Water Commissioner, to review operations and accounting. <br />Please contact me at the number below N you have any Questions. <br />Sincerely, <br />an qri M. Hemander'fs E. <br />Water Resource Engineer <br />ec: 9i8 Schneider, Acting District 2 Water Co missbner <br />Joanna YVIFIIiams, Denver SEO <br />WDID File (0203017, 0203026, 0203386) <br />Water Division 2 • Greeley <br />810"Street, Suite 200 - Greeley, CO S 32 . Phone: 970352 -8722 • Pax: 970- 392 -I816 <br />www.water.statexo.us <br />