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<br /> <br />Office of the State Engineer <br />1313 Sherman St, Room 821 <br />Denver, CO 80203 <br /> <br />Office of the State Engineer <br />1313 Sherman Street, Room 821, Denver, CO 80203 P 303.866.3581 <br />www.water.state.co.us <br /> <br /> <br /> <br /> <br />August 18, 2017 <br /> <br />Andrea C. Taillacq, PE <br />TZA Water Engineers <br />12596 W. Bayaud Ave., Ste 330 <br />Lakewood, CO 80228 <br /> <br />Re: Builders Aggregate, Inc. Substitute Water Supply Plan <br />WDID 0102764, SWSP ID 3147, Gravel Pit Permit No. M-81-112 <br />NW1/4 Section 31, T4N, R57W, 6th P.M., Morgan County <br /> Water Division 1, Water Districts 3 & 4 <br /> <br /> Period of Approval: August 18, 2017 through March 31, 2018 <br /> or March 31, 2019, subject to condition of approval #1 <br />Contact Information for Ms. Taillacq: 303-971-0030, Ataillacq@tza4water.com <br /> <br />Dear Ms. Taillacq: <br /> <br />We have reviewed your letter received June 15, 2017 and additional information provided on July <br />26, 2017, in which you request approval of a Substitute Water Supply Plan (“SWSP”) on behalf of <br />the Builder’s Aggregate, Inc. (“BA” or “Applicant”), in accordance with § 37-90-137(11), C.R.S., <br />along the South Platte River. The required fee of $1,593 for the SWSP has been paid (receipt no. <br />3680272). <br />SWSP Operation <br /> <br />This SWSP submittal addresses the projected depletions from the BA Mine (0110923), located <br />northwest of Fort Morgan on the south bank of the South Platte River in the NW1/4 of Section 31, <br />T4N, R57W (see the attached Figures 1 & 2). BA uses a dredge to mine near the streambank, <br />removing marketable materials and refilling parts of the pond with unmarketable aggregate. The <br />area of exposed ground water will migrate as mining occurs on the property, but BA will maintain a <br />maximum exposed surface area of 3.45 acres until the property is reclaimed. Although the mining <br />pond has historically moved around within the mining boundary, and the bank separating the pond <br />from the river was removed due to flooding in recent years, recent and historical aerial photos <br />suggest that there has always been a surface water connection between the pond and the river, <br />such that depletions to the river are instantaneous. <br /> <br />BA’s depletions will be from exposing ground water as well as from water removed with mined <br />material, and water removed from the tributary stream by the “first fill”. The expected depletions <br />from each category are described below. <br />