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n <br /> COLORADO <br /> dDivision of Water Resources <br /> Department of Natural Resources <br /> August 29, 2023 <br /> Greg Geras <br /> Land Resource Manager <br /> Asphalt Specialties Co., Inc. <br /> 10100 Dallas Street <br /> Henderson, CO 80640 <br /> Re: Chavers Mining Resources Substitute Water Supply Plan (WDID 0202654) <br /> DRMS File No. M-2015-030 (0210488) <br /> E '/z of the SW '/a of Section 18, Twp. 1N, Rng. 66W of the 6th P.M. <br /> Water Division 1, Water Districts 2, Weld County <br /> SWSP ID: 5057 <br /> Approval Period: August 1, 2023 through December 31, 2023 (or July 31, 2024 subject to <br /> Condition No. 1) <br /> Contact Information for Greg Geras: 303-289-8555 and GreQG@asphaltspecialties.com <br /> Dear Greg Geras: <br /> This letter is in response to your June 2, 2023 substitute water supply plan ("SWSP") renewal request for <br /> a sand and gravel pit operated by Asphalt Specialties Co., Inc. ("Asphalt Specialties" or "Applicant") in <br /> accordance with section 37-90-137(11), C.R.S. The Applicant shall be responsible for compliance with this <br /> SWSP, but the State Engineer's Office ("SEO") may also pursue the landowner for eventual compliance. <br /> The original plan was approved on August 3, 2016 and was most recently renewed on June 27, 2022. The <br /> required fee of $257 for the SWSP has been paid (receipt no. 10029508). <br /> SWSP Operations <br /> The Chavers Mining Resources site is located in the E '/z of the SW '/a, Section 18, Township 1 North, Range <br /> 66 West of the 6th P.M. (Figure 1, attached). The depletions that result from the mining operation over <br /> the period of this SWSP include evaporation from exposed groundwater, dust suppression, dewatering, <br /> concrete production, and water lost with the mined product. The life expectancy of the Chavers Mining <br /> Resources site is approximately 10 to 12 years, with 4 to 6 years remaining. Approximately 650,000 tons <br /> are to be excavated from the pit each year during the mining operation. <br /> Mining operations will occur in Cells 2, 3, and 4 during this SWSP period. The site is actively being <br /> dewatered to facilitate dry mining. The dewatering water is discharged into a sedimentation pond to <br /> settle out fines and from there into another dewatering trench which discharges to the South Platte River <br /> as shown on attached Figure 2. There is also a concrete production plant on Cell 1 at the site which <br /> utilizes groundwater from the onsite alluvial well, permit no. 80120-F. <br /> Fully consumable water from the City of Aurora will be used to replace depletions from the mining <br /> operation. The proposed reclamation of the site is a lined reservoir through the construction of a <br /> compacted clay liner around the mining area. <br /> In accordance with the letter dated April 30, 2010 (copy attached) from the Colorado Division of <br /> Reclamation, Mining, and Safety ("DRMS"), all sand and gravel mining operators must comply with the <br /> requirements of the Colorado Reclamation Act and the Mineral Rules and Regulations for the protection of <br /> �.OF cOl0 <br /> 1 1 $herrri�n Lrt t, I��oun ki11, bp�lwer, C0 942b P�O�. {,6.3591 www.tralrarado_lowwaLer e� <br /> Jared S_ Iblis, Gbyi� br I ban Gibs, Ekecunyi�b mttor I Koimrr G. I!in. State En irreerlbir�ttnr I y — ' o <br /> *1876�` <br />