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Rifle Gravel Pit#1 May 2023 <br /> 0 8,973 CY <br /> • Excess topsoil for use in post-mining reclamation (estimate): <br /> o 566 CY <br /> • Although not included within the Permitted Area or Affected Lands, Scott has obtained a <br /> Colorado Department of Transportation (CDOT)Access Permit(Permit No. 320024, <br /> Attachment B)that includes a plan to improve CR 346 with a hard surface from mile <br /> post 94.50 to 95.14 at the access to Rifle Pit#1. <br /> • Erosion and sediment control Best Management Practices (BMPs)will be installed per <br /> the Erosion Control Plan (Figure 13, Exhibit D2)and Stormwater Management Plan <br /> and Permit requirements. <br /> • Approximately 6,800 linear feet of straw wattle will be installed. <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 /> 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 of perimeter berms will be <br /> temporarily stockpiled on site. The excess overburden will be sold as a secondary <br /> commodity and 8,973 CY of excess topsoil will be sold and 566 CY of topsoil will stabilized <br /> and retained for final reclamation purposes. The location of the stockpile areas is depicted <br /> on Figure 9, Exhibit C4 and Figure 10, Exhibit C5 and located to provide physical <br /> separation between the stockpiles, mining activity, and any wetland or tailwater channel <br /> buffer areas and intended to prevent inadvertent sediment discharges off-site. Earthwork <br /> volume calculations are provided in 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 <br /> ■ Acreage varies <br /> o Temporary topsoil stockpile <br /> ■ 9,539 CY(note 566 CY will be stabilized and retained for final reclamation) <br /> ■ Acreage varies <br /> 23 <br />