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Dear Mr. Williams: <br />DEPARTMENT OF NATURAL RESOURCES <br />DIVISION OF WATER RESOURCES <br />Mr. Todd Williams, P.E. <br />— Williams and Weiss Consulting, LLC <br />5255 Ronald Reagan Blvd, Ste. 220 <br />Johnstown, CO 80534 <br />March 27, 2013 <br />RE: Timnath - Connell Substitute Water Supply Plan (WDID <br />Timnath - Connell Pit, DRMS No. M- 1999 -050 (WDID No. <br />Water Division 1, Water District 3 ' <br />Approval Period: April 1, 2013 through March 31, 2014 <br />Contact Phone Number for Mr. Williams: 303 - 653 -3940 <br />John W. Hickenlooper <br />Governor <br />Mike King <br />Executive Director <br />Dick Wolfe, P.E. <br />Director /State Engineer <br />No. 0302526) <br />0303018) <br />RECEIVED <br />MAR 2 8 2013 <br />Division of Reclamation, <br />Mining & Safety <br />This letter is in response to your letter dated February 15, 2013 on behalf of Connell <br />Resources, Inc (Applicant) requesting renewal of the above referenced substitute water supply <br />plan for the Timnath - Connell Pit to cover depletions caused by gravel mining operations in <br />accordance with § 37 -90- 137(11), C.R.S. The required fee of $257 has been submitted (receipt <br />no. 3658906). The most recent SWSP renewal was approved on March 30, 2012 and expires on <br />March 31, 2013. <br />Pit Operations <br />Mining operations at the Timnath - Connell Pit are currently on hold. Mining ceased during <br />the 2011 SWSP approval period and no mining is projected to occur during this SWSP approval <br />period. There will be processing of sand and gravel material that is imported from Connell's <br />SerFer pit. The only depletions are expected to be from dust control and evaporation of exposed <br />ground water. Replacement will occur through an on -site recharge pond using Box Elder Ditch <br />Company shares. <br />Depletions <br />The Timnath - Connell Pit will not be mined during this approval period and thus no water will <br />be lost in mined product. It is anticipated that 0.8 acre -feet of water will be used for on -site dust <br />control, which equates to approximately 5 truckloads per month. There are 6.42 acres of exposed <br />ground water at the site in addition to the 8.10 acre recharge pond. Gross evaporation at the <br />Timnath - Connell Pit is estimated to be approximately 39 inches /year and with an annual effective <br />precipitation amount of 0.84 feet (10.1 inches), net annual evaporation is estimated to be <br />approximately 2.41 acre -feet per acre (28.9 inches). For the 6.42 acres of ground water exposed <br />at this site, annual net evaporation is estimated to be 15.47 acre -feet. The total annual <br />consumptive use from evaporation and operational uses at the site is 16.27 acre -feet. The <br />evaporative loss from the recharge pond is deducted from the deliveries to the recharge pond in <br />the given month prior to determining the net positive accretion or depletion from the pond and is <br />Tr Office of the State Engineer <br />1313 Sherman Street, Suite 818 • Denver, CO 80203 • Phone: 303 - 866 -3581 • Fax: 303 - 866 -3589 <br />www.water.state.co.us <br />