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2025-2026 Valley's Edge Resource Substitute Water Supply Plan Renewal Page 2 of 10 <br /> January 29, 2026 <br /> (receipt no. 10045393). This plan was most recently valid for the period of November 1, <br /> 2024 through October 31, 2025. <br /> SWSP Operations <br /> This SWSP seeks to replace depletions resulting from the Valley's Edge Resource Gravel Mine <br /> (Figure 1, attached). The Valley's Edge Resource Gravel Mine is located near the City of <br /> Brighton in Section 20,Township 1 North, Range 66 West of the 61h P.M. The Applicant <br /> commenced mining the site in June 2017. Depletions during this SWSP consist of evaporation <br /> from exposed groundwater, dust control, and water retained in removed product. Depletions <br /> for this site will be replaced using effluent water leased from the City of Aurora. <br /> According to the DRMS permit, the life expectancy of the Valley's Edge Resource Gravel Mine <br /> is less than 20 years. The proposed reclamation of the site is an industrial development, <br /> which will require a complete backfill of the site. IBackfilling of completed mined areas <br /> began in August 2022. The total amount of groundwater exposure is likelyto reduce over the ,- Commented[1]:Is backfilling still going on?Why this <br /> g g —————p —————< comment? <br /> period of the SWSP as the area is backfilled. The exposed area will not exceed 16 acres Commented[2111]:How many acres were exposed <br /> previous plan?How many claiming under this plan?=> <br /> during this approval period. determine what stage of backfill,or if completed.If still unsure, <br /> can ask consultant.In general,need to backfill,line,or aug <br /> plan.Need to show progress. <br /> In accordance with the letter dated April 30, 2010 (attached)from the Colorado Division of <br /> Reclamation, Mining, and Safety ("DRMS"), all sand and gravel mining operators must comply <br /> with the requirements of the Colorado Reclamation Act and the Mineral Rules and <br /> Regulations for the protection of water resources. The April 30, 2010 letter from DRMS <br /> requires that the Applicant provide information to DRMS to demonstrate the ability to <br /> replace long-term injurious stream depletions that result from mining related exposure of <br /> groundwater. The DRMS letter identifies four approaches to satisfy this requirement. In <br /> accordance with approach nos. 1 and 3, the Applicant has obtained a bond for�$873,550 ,- Commented[3]:Need to verify with applicant. <br /> through the DRMS for complete reclamation of the site which, according to the DRMS <br /> permit,will require a complete backfill of the site. <br /> Depletions <br /> The projected depletions for the period of this SWSP impact the South Platte River below <br />