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COLORADO <br /> Division of Water Resources <br /> Dcrar;mo,,t of Natural hesou-ces <br /> 1313 Sherman Street, Room 821 <br /> Denver,CO 80203 <br /> September 16, 2016 <br /> Tri-Districts <br /> 4424 La Porte Avenue <br /> Fort Collins, CO 80524 <br /> c/o Gary Linden (Tetra Tech Inc.) Gary.Li nden@tetratech.com <br /> RE: SLURRY WALL LINER APPROVAL <br /> Treiber B Pond <br /> Treiber Ponds Reservoir System (WDID 0303323) <br /> Treiber Lakes, DRMS M-2011-049 (WDID 0303042) <br /> SW1/4 Section 33, T8N R69W, WATER DIVISION 1, WATER DISTRICT 3 <br /> Dear Mr. Linden: <br /> The purpose of this letter is to approve the lining of the Treiber B Pond. This reservoir is located primarily <br /> in the SW1/4 of Section 33, Township 8 North, Range 69 West of the 61h P.M. and is a part of the Treiber <br /> Lakes gravel pit (DRMS M-2011-049). Treiber B Pond was lined with a soil bentonite slurry wall. The slurry <br /> wall leak test commenced on June 14, 2016 and concluded on September 12, 2016. Site inspection was <br /> performed by our office on July 26, 2016 to review site conditions and the leak test plan. <br /> Your report received on September 14, 2016 provides the liner summary and leak test result. The test <br /> data provided indicates that the reservoir 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). Meeting <br /> the design standard requires that during reservoir operations all water inflows and outflows for the <br /> liner perimeter enclosed area be accounted for on a monthly basis. <br /> With this liner approval, the Treiber B Pond is now classified as a lined reservoir in accordance with the <br /> 1999 SEO Guidelines. Water shall not be impounded in the reservoir except pursuant to lawful diversions <br /> allowed by statute or decree. At all other times, all inflow of water into the reservoir from any source, <br /> including precipitation and ground water inflows shall be removed to prevent illegal storage of water. <br /> Prior to ANY use of this site, the owner or operator will need to coordinate with Mark Simpson, District 3 <br /> Water Commissioner, to review operations, measurement structures, stage-storage curves, and <br /> accounting. <br /> Please contact me at the number below if you have any questions. <br /> Sincerely, <br /> 4�a&'�0'� <br /> loana Comaniciu, P.E. <br /> Water Resource Engineer <br /> ec: Mark Simpson, District 3 Water Commissioner (Mark.Simpson@state.co.us)) <br /> Louis Flink, Diversion Records Coordinator (Louis.FlinkCstate.co.us) <br /> WDID File (0303042, 0303323) <br /> OF Cc-)" <br /> I �e to <br /> 1313 Sherman Street, Room 821, Denver, CO 80203 P 303.866.3581 F 303,866.3585 www.water.state.co.us <br /> ` 187. <br />