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2024-2025 Valley's Edge Resource Substitute Water Supply Plan Renewal Page 2 of 10 <br /> December 17, 2024 <br /> (receipt no. 10039192). This plan was most recently valid for the period of November 1, <br /> 2023 through October 31, 2024. <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 6t" 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. Backfilling of completed mined areas <br /> began in August 2022. <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 <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 /> Brighton, CO and consist of net evaporation from exposed groundwater surface area, dust <br /> control, and water retained in removed product. No dewatering will occur during this <br />