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ASCI Turnpike Mining Resources SWSP Page 2 of 9 <br /> November 25, 2024 <br /> SWSP Operations <br /> This plan seeks to replace evaporative depletions resulting from mining activities at the <br /> Turnpike Mining Resource Gravel Pit ("Turnpike Pit"). The site is located in Section 31, <br /> Township 2 North, Range 68 West, 6t" P.M. at 599 Highway 52. Sand and gravel extraction <br /> has ceased at the site as of October 2022. No sand and gravel extraction are anticipated <br /> during 2025. The Applicant may decide to backfill portions of the site or continue mining at <br /> a future date. Cell 1 has been reclaimed and released from bonding as a reservoir, known as <br /> NWRF Reservoir (WDID 0603010). Cells 2 through 6 are currently being reclaimed to return <br /> the site to agricultural use and are bonded to cover reclamation activities. Replacement <br /> water is fully consumable replacement water leased from the Town of Erie. <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 /> attached, requires that the Applicant provide information to DRMS to demonstrate the <br /> ability to replace long-term injurious stream depletions that result from mining related <br /> exposure of groundwater. The DRMS letter identifies four approaches to satisfy this <br /> requirement. In accordance with approach nos. 1 and 3, the Applicant has indicated that a <br /> bond has been obtained for $1014,000.00 through the DRMS for lining of this site to ensure <br /> that depletions from groundwater evaporation do not occur in the unforeseen event(s) that <br /> would lead to the abandonment of the pit. <br /> Depletions <br /> No operational depletions or dewatering will occur during this SWSP. Evaporative depletions <br /> at the site occur from within Cells 2A, 213, 3, 4, 5 and 6, which are summarized in Table A <br /> below. The Applicant proposes to replace evaporation from exposed groundwater at the site <br /> based upon evaporation atlases in NOAA Technical Report NWS 33 and the SEO monthly <br /> distribution factors for sites below 6,500 feet, as shown in Tables 1 and 2 (attached). Gross <br />