2023-12-13_HYDROLOGY - M2004009 (2)

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COLORADO 4Wa Division of Water Resources Department of Natural Resources December 13, 2023 Greg Geras, Land Resource Manager Asphalt Specialties Co. 10100 Dallas St Henderson, CO 80640 Re: Turnpike Mining Resource Substitute Water Supply Plan (WDID 0602547) DRMS File No. M-2004-009 (0603016) Part of Section 31, Twp. 2N, Rng. 68W, 6th P.M., Weld County Water Division 1, Water District 6 SWSP ID: 4644 Approval Period: January 1, 2024 through December 31, 2024 Contact Information for Greg Geras: 303-289-8555 and GreQG@asphaltspecialties.com Dear Greg Geras: This letter is in response to the November 1, 2023 renewal request and the November 7, 2023 amended renewal request for the above-referenced substitute water supply plan ("SWSP") for a sand and gravel pit operated by Asphalt Specialties Co., Inc. ("ASCI" or "Applicant") in accordance with section 37-90-137(11), C.R.S. The required fee of $257.00 for the renewal of this substitute supply plan ("SWSP") has been submitted (receipt no. 10032649). This plan was originally approved in 2006 and was most recently approved on February 24, 2023. SWSP Operations This plan seeks to replace depletions resulting from mining at the Turnpike Mining Resource Gravel Pit ("Turnpike Pit"). The site is located in Section 31, Township 2 North, Range 68 West, 6fh P.M. at 599 Highway 52. Sand and gravel extraction has ceased at the site as of October 2022. No sand and gravel extraction are anticipated during 2024. The Applicant may decide to backfill portions of the site or continue mining at a future date. Cell 1 has been reclaimed and been released from bonding as a reservoir. Cells 2 through 6 are currently being reclaimed to return the site to agricultural use and are bonded to cover reclamation activities. Depletions which occur during this SWSP are evaporation and lagged depletions from past operations. Replacement water will be obtained through leasing fully consumable replacement water from the Town of Erie. In accordance with the letter dated April 30, 2010 (attached) from the Colorado Division of Reclamation, Mining, and Safety ("DRMS"), all sand and gravel mining operators must comply with the requirements of the Colorado Reclamation Act and the Mineral Rules and Regulations for the protection of water resources. The April 30, 2010 letter from DRMS requires that the Applicant provide information to DRMS to demonstrate the ability to replace long-term injurious stream depletions that result from mining related exposure of groundwater. The DRMS letter identifies four approaches to satisfy this requirement. In accordance with approach nos. 1 and 3, the Applicant has indicated that a bond has been obtained for $1,114,000.00 through the DRMS for lining of this site to assure that depletions from groundwater evaporation do not occur in the unforeseen event(s) that would lead to the abandonment of the pit. 1313 Sherman Street, Room 821, Denver, CO 80203 P 303.866.3581 www.colorado.gov/water Jared S. Polis, Governor I Dan Gibbs, Executive Director I Kevin G. Rein, State Engineer/Director I *1876{`