2022-01-14_PERMIT FILE - M2021067

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COLORADO 60 Division of Water Resources Department of Naturai Resources Response to Reclamation Permit Application Consideration DATE: January 4, 2022 TO: Eric Scott, Environmental Protection Specialist, transmission via email at: eric.scott@state.co.us EC: Division 1 Office, District 2 Water Commissioner FROM: loana Comaniciu, P.E. RE: Stiles Mining Resources, File No. M-2021-067 Operator: Asphalt Specialties Co.- David Hunt (303)-289-8555 Contact: David King (303) 289-8555 The E 'h of the E 'h of the SE'/a of Section 35 and the SW '/a of Section 36, Twp 5 North, Rng 66 West, 6th P.M., Weld County CONDITIONS FOR APPROVAL ® The proposed operation will consume ground water by: ® evaporation, ® dust control, dewatering, ® water removed in the mined product, ® reclamation: Prior to initiation of these uses of ground water, the applicant will need to obtain either a gravel pit or other type of well permit, as applicable. However, prior to obtaining a permit, an approved water supply plan or decreed plan for augmentation is required. On November 30, 2021 Asphalt Specialties Co., submitted a requested for a SWSP for this site (under receipt no. 10017135) and an application for a well permit (under receipt no. 10017134) and these applications are pending evaluation. ® Prior to approving a well permit, the applicant must conduct a field inspection of the site and document the locations of all wells within 600 feet of the permit area. The applicant must then obtain a waiver of objection from all well owners with wells within 600 feet of the permit area or request a hearing before the State Engineer. COMMENTS: The subject application is for a surface mining operation on approximately 158.3 acres located in the E 'h of the E 'h of the SE'/a of Section 35 and the SW '/a Section 36, Township 5 North, Range 66 West of the 6th P.M. The primary commodities to be mined at the site are sand and gravel. The material will be processed into various products and gradations to be used as a part of construction materials including such as asphalt, concrete, grout, structural fill, and aggregate base course. The mining plan currently includes mining in four phases and twelve mine blocks ranging in size from 10 to 13 acres. The area to be mined is currently used for agricultural purposes. The mining plan calls for excavation to remove aggregate from approximately 36 feet. Dewatering trenches, pump basins, ditches, and pumps will be installed prior to the excavation of aggregate material from any mine block. All mine phases and blocks will include the dewatering trenches around the perimeter that will be placed at the toe of each successive mining slope. All aggregate material excavated from the mine phases will be dewatered and dry mined. The site is proposed to be reclaimed as general agricultural and heavy industry by using inert fill material to backfilling the mined areas. Prior to the use/exposure of any ground water the applicant must first obtain a well permit and a substitute water supply plan or decreed plan for augmentation. The site must continue to be operated under a substitute water supply plan until such time as the proposed backfilling is completed and replacement of lagged depletions shall continue until there is no longer an effect on stream. Off'C01Q� 1313 Sherman Street, Room 821, Denver, CO 80203 P 303.866.3581 www.colorado.gov/water ye Jared S. Polis, Governor I Dan Gibbs, Executive Director I Kevin G. Rein, State Engineer/Director *1876{`