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COLORADO <br /> Division of Water Resources <br /> August 1, 2018 <br /> Paul Weiss, P.E. <br /> Williams and Weiss Consulting, LLC <br /> 5255 Ronald Reagan Blvd, Ste 220 <br /> Johnstown CO 80534 <br /> Re: Derr Pit Substitute Water Supply Plan (WDID 0302547, Plan ID 5240) <br /> DRMS File No. M-2008-017 (WDID 0303035) <br /> Section 4, T5N, R65W, 61h P.M. <br /> Water Division 1, Water District 3, Weld County <br /> Approval Period: August 1, 2018 through July 31, 2019 <br /> Contact information for Mr. Weiss: 970-221-5159; pswwater@msn.com <br /> Dear Mr. Weiss: <br /> We have reviewed your letter dated May 31, 2018 requesting approval of a substitute water <br /> supply plan ("SWSP") on behalf of Broken Arrow Investments, LLC ("Broken Arrow" or "Applicant") in <br /> accordance with Section 37-90-137(11), C.R.S., to cover depletions caused by an existing gravel pit <br /> operation known as the Derr Pit (M-2008-017). A SWSP for this site was originally approved on <br /> November 12, 2010 and was last renewed in a letter dated December 31, 2012 to cover operations <br /> through December 31, 2013. A request for renewal was not received prior to the expiration date of <br /> the previous plan, therefore this SWSP is considered a request for a new SWSP. The required filing <br /> fee of $1,593 has been received (receipt no. 3686678). <br /> SWSP Operations <br /> The Derr Pit is a gravel pit operation located in the NEI/a of Section 4, Township 5 North, <br /> Range 65 West of the 6th P.M., in Weld County. Mining operations at the Derr Pit ceased after <br /> December 31, 2012 but are anticipated to recommence during this plan period. According to <br /> information provided by the Applicant, past operations at the site did not expose any groundwater. <br /> In 2018, Broken Arrow obtained an amendment (AM01) to their reclamation permit to add 105.8 acres <br /> to permit M-2008-017 and to revise the mining and reclamation plans. During this plan period, <br /> consumptive uses at the Derr Pit site will include evaporative losses from exposed ground water, <br /> water used for dust control purposes, and water lost in the mined product. The pit is proposed to be <br /> continuously dewatered up until a slurry wall is constructed around the site. A slurry wall is <br /> anticipated to be constructed around Phases 1-4 of the original permit area in the next 2-3 years. A <br /> second cell is proposed to be constructed around Phases 5-7 prior to the exposure of ground water in <br /> 6 �i R. 3 i i C+ 1 F, I - 11 ( r ..a ( t . t <br /> r #+ <br />