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187 <br />DEPARTMENT OF NATURAL RESOURCES e C 5 <br />, DIVISION OF WATER RESOURCES <br />Richard T. Raines, P.H. <br />Assistant Water Resource Manager <br />kjTri- Districts <br />4424 LaPorte Avenue <br />Fort Collins, CO 80521 <br />October 1, 2012 <br />REG_ <br />RE: Partners Combined S s ttt u t e water Su ppl y plan (WDID 0302556) <br />(AMENDMENT #1) <br />Treiber Lakes, DRMS Permit No. M- 2011 -049 (WDID 0303042) <br />Home Office Pit, DRMS Permit No.11b(- 1977 -439 (WDID 0303005) <br />Section 33- Township 8N and Section 3- Towship 7N, Range 69W, 6 P.M. <br />Water Division 1, Water District 3, Larimer County <br />Approval period: October 1, 2012 through December 31, 2013 <br />Contact Information for Mr. Raines: (970) 218 -2738; rraines(ascwtp.orq <br />John W. Hickenlooper <br />Governor <br />Mike King <br />Executive Director <br />Dick Wolfe, P.E. <br />Director /State Engineer <br />Dear Mr. Raines: <br />We have reviewed your letter dated September 14, 2012, requesting an amendment of the <br />above referenced substitute water supply plan ( "SWSP ") that covers depletions for five previously <br />mined gravel pits (ponds) within the Home Office Pit that are owned and operated by the Tri- <br />Districts and the City of Greeley ( "Partners" or "Applicant ") in accordance with § 37 -90- 137(11), <br />C.R.S. The Home Office Pit is operated by Martin Marietta Materials and is included in their <br />Upper Poudre Combined SWSP (WDID 0302517) most recently approved in a letter dated May <br />11, 2011. The required fee of $257.00, required to add operations covered under DRMS Permit <br />M- 2011 -049 has been received (receipt # 3657029). <br />Amended SWSP Operations <br />Treiber A & B Lake were constructed under, and previously covered by, DRMS permit <br />M- 1977 -439. They have now been removed from that permit and are the subject of DRMS <br />permit M- 2011 -049, under which they will be lined with a slurry wall. This amendment adds the <br />mining operation of installing a slurry wall around Treiber A Lake and associated depletions, and <br />also adds another replacement source to the plan. Construction of the slurry wall is set to <br />commence in October 2012 and is projected to be completed by December 1, 2012 after which <br />a 90 -day leak test will commence. Treiber B Lake is planned to have its liner installed in 2014 <br />and will be addressed in the next SWSP renewal. <br />Dewatering of Treiber A lake will start on October 8, 2012. Groundwater will be removed <br />from within Treiber A through a culvert on the east side of the lake, discharging into Treiber B <br />and no groundwater will be directly discharged into the Poudre River. Treiber A and B exhibit <br />the same physical characteristics that would be used as input values in determining lagged <br />depletions and lagged accretions. As the depletions will be offset by the recharged accretions, <br />this dewatering operation results in a net zero water balance where there are no dewatering <br />credits available nor dewatering depletions that will be owed to the river. <br />Office of the State Engineer ; 2$v <br />1313 Sherman Street, Suite 818 • Denver, CO 80203 • Phone: 303 - 866 -3581 • Fax: 303 - 866 -3589 <br />www.water.state.co.us <br />