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Rifle Gravel Pit#1 July 2023 <br /> • Total overburden removal quantities (estimate): <br /> o 11.18 acres [54,111 cubic yards (CY)] <br /> ■ 30" cut= 42,267 CY <br /> ■ 6" topsoil = 11,844 CY <br /> • Berm quantities (estimate): <br /> ■ 2.87 acres (11,528 CY overburden) <br /> ■ 2,305 CY topsoil for reclamation <br /> • Excess overburden retained through 60% and sold gradually as a secondary <br /> commodity (estimate): <br /> ■ 30,423 CY <br /> • Excess topsoil retained through 60% and sold gradually as a secondary commodity <br /> (estimate): <br /> ■ 9,006 CY <br /> • Excess topsoil for use in post-mining greenbelt reclamation, Phase 3, will be <br /> temporarily stabilized with the upland seed mix(estimate): <br /> ■ 533 CY <br /> ■ Perimeter Area outside berm incidental seeding and/or weed treatment only, <br /> as needed = 3.54 acres. <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 7,800 linear feet of straw wattle will be installed around the perimeter <br /> of the 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 /> 6.2.1.2 Planned Topsoil &Overburden Storage Area <br /> The extent(area and volume) of the topsoil and overburden storage/stockpile areas was <br /> calculated assuming that all overburden material and topsoil that are not used for the <br /> construction and reclamation of the perimeter berms will be stockpiled on site. The excess <br /> overburden (30,423 cubic yards [CY])will be temporarily stored as mining progresses to <br /> 23 <br />