Laserfiche WebLink
of cOlO DEPARTMENT OF NATURAL RESOURCES <br /> 6 DIVISION OF WATER RESOURCES <br /> Bill Ritter,Jr. <br /> 187& Governor <br /> Mike IGng <br /> Executive Director <br /> Dick Wolfe,P.E. <br /> Director/State Engineer <br /> David I-Nettles,P-E. <br /> Acting Division Engineer <br /> August 19, 2010 <br /> Mr.Jeremy Deuto, P.G. <br /> Tetra Tech <br /> 1900 S. Sunset Street, Suite 1-17 <br /> Longmont, CO 80501 <br /> Re: Lining of Brighton Mine, South Reservoir-DRMS # 77-436-WDID 0203031 <br /> W'/2, Section 23, T1S, R67W-Water Division 1,Water District 2 <br /> Dear Gary: <br /> The purpose of this letter is to approve the lining of the above referenced mined gravel pit area enclosed <br /> by a slung wall. Installation of the slurry wall occurred between April and August, 2007. The <br /> approval/testing process began with submittal of a proposed leak test procedure and data collection on <br /> December 11, 2009. This process also included a site visit on January"11, 2010 by Jana Ash of the SEO. <br /> You provided the results of the 90 day test in an engineering report dated July,.2010. The estimated slurry <br /> wall enclosed area inflows from precipitation and groundwater during the test indicate that this pit has <br /> been lined to the performance standard referenced in the August 1999 State Engineer Guidelines for <br /> Lining Criteria for Gravel Pits. Meeting the performance standard requires that all water inflows and <br /> outflows for this slurry wall enclosed area must be accounted for on a weekly basis. <br /> Although this site is not currently being used for water storage, prior to ANY use of this site for water <br /> storage, the owner or operator will need to coordinate with the District 2 Water Commissioner, currently <br /> Scott Edgar, to provide him with the required weekly water accounting. <br /> Please contact me if you have any questions. <br /> Sincerely, <br /> David L. Nettles, P.E. <br /> Acting Division Engineer <br /> Brighton South_Res_Performance PitLineOK.doc <br /> CC: Scott Edgar,Water Commissioner <br /> Joanna Williams, Denver SEO <br /> Water Division 1 • Greeley <br /> 810 91h Street,Suite 200•Greeley,CO 80631 •Phone:970-352-8712•Fax:970-392-1816 <br /> www.water.statexo.us <br />