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DEPARTMENT OF NATURAL RESOURCES <br />DIVISION OF WATER RESOURCES <br />alroedooper <br />>siaecut %rector <br />Dick Wolfe, P.E. <br />December 16, 2011 Director /State Engineer <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- DERSHAM RESERVOIR, WDID 0203386 <br />PARKER- DERSHAM RESOURCE PIT, DRMS M- 2006 -003, WDID 0203026 <br />BASELINE RESOURCE PIT, DRMS M- 1997 -058, WDID 02030117 <br />E% SE' /. S36- TIN -R67W, WATER DIVISION 1, WATER DISTRICT 2 <br />Dear Derek: <br />The purpose of this letter is to approve the fining of the Kirby- Dersham Slurry Wall. The slurry wait is <br />generally located in the E% of the SEY4 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, 2019. A site inspection was perbrrned 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 raesulL The <br />test data provided indicates that the oft has been lined to the design standard referenced in the <br />August 1999 State Engineer Guidelines for Lining Criteria for Gravel Pits (1999 SEO Guidelines). <br />Meeting the design standard requires that all water Inflows and outflows for ON liner perimeter <br />enclosed area must be accounted for on a monthly basis. <br />With this liner approval, the Kirby- Dersharn Reservoir may be used to stone 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 opt and accounting. <br />Please contact me at the number below if you have any questions. <br />Sincerely, <br />on NI. Hemandeir, i <br />Water Aesource Engineer <br />ec: Bill Schneider, Acting District 2 Wafer Commissioner <br />Joanna Wifiianw, Denver SEO <br />WDID File (0203017.0203426, 0203386) <br />Water Division 1 • Greeley <br />810"Street Suite 200 • Greeley, co 80631 • Phone: 970 -352 -8712 • Fax: 970 - 392 -7616 <br />www.water.state.co.us <br />