2012-08-20_HYDROLOGY - M2008078 - Laserfiche WebLink

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i Ms. Michelle Hatcher - Clear Water Solutions 8010 S. County Road 5, Ste. 105 Windsor, CO 80528 Depletions DEPARTMENT OF NATURAL RESOURCES DIVISION OF WATER RESOURCES August 20, 2012 RE: GP Aggregates' West Farm Pit Substitute Water Supply Plan '° r :EIVED DRMS -Mt 008 -078 Sections 33 & 28, T22S, R46W, 6 PM ✓ Water Division 2, Water District 67, Prowers County AUG 2 0 2012 John W. Hickenlooper Governor Mike King Executive Director Dick Wolfe, P.E. Director /State Engineer Division of Reclamation, Approval Period: May 1, 2012 through April 30, 2013 (or April 30, 2014 subject to conciitii no. 1) Contact Phone Number for Ms. Hatcher: 970 - 223 -3706 Dear Ms. Hatcher; We have reviewed your letter of January 26, 2012 requesting renewal of the above referenced substitute water supply plan ( "SWSP ") for a sand and gravel pit to be operated by GP Aggregates, LLC ( "GP Aggregates" or "Applicant ") in accordance with C.R.S. §37 -90- 137(11). The applicant shall be responsible for compliance with this plan, but the State Engineer's Office may also pursue the landowner for eventual compliance. The required fee of $257 (receipt no. 3653808) has been submitted. The original SWSP was approved on June 17, 2009 and it was most recently approved in a letter dated January 9, 2012. Plan Operation This plan seeks to replace depletions resulting from mining operations at the West Farm Pit. The depletions from the mining operation are evaporation, water lost in the mined product, and dust suppression. The mine is located in Prowers County in the S1/2 of the SE1 /4 of Section 28 and the NE1 /4 and the NW1 /4 of Section 33, Township 22 South, Range 46 West of the 6 P.M. Mining has not commenced at this site, however, GP Aggregates would like to keep the SWSP current as mining could begin in 2012. This SWSP will provide for the replacement of the projected depletions of 30.8 acre -feet from May 1, 2012 through April 30, 2013 (or April 2014 subject to condition no. 1). The replacements will be made using 38 shares of the Lower Arkansas Water Management Association. The West Farm Gravel Pit will be dry mined with the use of dewatering trenches and a discharge settling pond. The length of the dewatering trenches will change throughout mining, but the maximum will occur when two phases are completely mined but reclamation has not yet begun on any given phase. The maximum size of the dewatering trench will be 4,350 feet long and 5 feet wide (0.5 acre). The discharge settling pond will be 50 feet by 100 feet (0.11 acres) for a maximum total exposed surface area of the site during mining to be 0.61 acres. You have estimated that this Office of the State Engineer -Pr: O S C 1313 Sherman Street, Suite 818 • Denver, CO 80203 • Phone: 303 - 866 -3581 • Fax: 303 - 866 -3589 www.water.state.co.us