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Rifle Gravel Pit#1 June 2023 <br /> • Excess overburden for sale post-berm construction (secondary commodity) <br /> (estimate): <br /> 0 30,423 CY <br /> • Excess topsoil for sale post-berm construction (estimate) <br /> o 8,973 CY <br /> • Excess topsoil for use in post-mining greenbelt reclamation, Phase 3, will be <br /> temporarily seeded (estimate): <br /> o 566 CY <br /> • Although not included within the Permitted Area or Affected Lands, Scott is in the <br /> process of reapplying for a Colorado Department of Transportation (CDOT) Access <br /> Permit (Expired Permit No. 320024, Attachment B) that includes a plan to improve <br /> CR 346 with a hard surface from mile post 94.50 to 95.14 at the access to Rifle Pit <br /> #1. <br /> • Erosion and sediment control Best Management Practices (BMPs)will be installed <br /> per the Erosion Control Plan (Figure 13, Exhibit D2) and Stormwater Management <br /> Plan and Permit requirements. <br /> • Approximately 6,800 linear feet of straw wattle will be installed around the perimeter <br /> and temporary overburden and topsoil stockpiles. <br /> Equipment <br /> This phase will use conventional earth moving equipment to grade, remove vegetation and <br /> stockpile topsoil, including but not limited to a bulldozer, track-hoe, and a 35-ton haul truck. <br /> Scott will use a tractor and disc, as needed, to decompact the berm and any incidental <br /> areas needing topsoil and seeding. <br /> 5.2.1.2 Planned Topsoil & Overburden Storage Area <br /> The extent of the temporary stockpile areas was calculated assuming that all overburden <br /> material and topsoil that are not used for the construction and reseeding of the perimeter <br /> berms and reclamation of the greenbelt area, will be temporarily stockpiled on site. The <br /> excess overburden will be sold as a secondary commodity and 8,973 CY of excess topsoil <br /> will also be sold within 180 days. There will be 566 CY of topsoil stockpiled and stabilized <br /> with temporary seeding and retained for final reclamation of the greenbelt during Phase 3. <br /> The location of the stockpile areas is depicted on Figure 9, Exhibit C4 and Figure 10, <br /> Exhibit C5 and located to provide physical separation between the stockpiles, mining <br /> activity, and any wetland or tailwater channel buffer areas and intended to prevent <br /> inadvertent sediment discharges off-site. Earthwork volume calculations are provided in <br /> Figure 14, Exhibit E1. <br /> Size of Area Worked <br /> The size of area involved with this Phase is 19.00 acres. See Exhibit E1, for the earthwork <br /> quantity estimates, including the areas and volumes, as applicable. <br /> o Temporary overburden stockpile <br /> ■ 30,423 CY, acreage varies <br /> 23 <br />