2023-07-19_REVISION - M2021052 (2)

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Rifle gravel Pit#1 Juiy 2023 1.3.1.1 Affected Lands Figure 2, Exhibit B depicts the Permitted Area, Affected Area, and 200-foot offset from Affected Lands. The Affected Land area is 19.00 acres. 1.3.1.2 Planned Material Storage Area The excavated wet gravel material will be stockpiled at the site of extraction and allowed to drain into the excavated pit and/or the underlying substrate. After the material is dry it will be transported to the Stockpile Area on the Operations Pad, where it will be stored until ready for processing. The Operations Pad will be a graded, compacted, graveled pad used to store equipment, pipes, fuel, scale house, restroom trailer and construction materials. Stockpiled material to be screened will be placed away from the active mining locations, and on the Operations Pad as shown in Figure 9, Exhibit C4 which depicts the mining activity extent for Phase 1, Phase 2, and Phase 3 30% and Figure 10, Exhibit C5, which depicts the mining activity extent for Phase 3 60% mined conditions. Section 5.2 discusses the estimated areas and volumes of the planned material storage for each mining phase. 1.3.1.3 Planned Topsoil &Overburden Storage Areas The extent(area and volume) of the topsoil and overburden storage/stockpile areas was calculated assuming that all overburden material and topsoil that are not used for the construction and reclamation of the perimeter berms will be stockpiled on site. The excess overburden (30,423 cubic yards [CY])will be temporarily stored as mining progresses to provide fill in the instance mining ceases. This material will be sold as a secondary commodity, to allow for the expansion of mining during the 60% to the 100% mining stages during Phase 3. The excess topsoil (9,539 CY) will also be stored and stabilized with an upland seed mix. The topsoil (9,006 CY) will be sold as a secondary commodity during the 60% to 100% mining stages during Phase 3, to allow for mining expansion. Approximately 533 CY of the excess topsoil will be needed to reclaim the greenbelt areas during final reclamation during Phase 3 and Phase 4. The location of the stockpile areas is depicted on Figure 9, Exhibit C4. These stockpile areas are located outside of the mining footprint but inside the perimeter berm, which provides physical separation between the stockpiles and any wetland or tailwater channel buffer areas and thus will prevent inadvertent sediment discharges. A typical soil profile illustrating the average conditions underlying the Permitted Area is provided in Figure 12, Exhibit D1. Earthwork volume calculations are provided in Figure 14, Exhibit E1. Section 5.2 discusses the estimated areas and volumes of the topsoil and overburden materials. 1.4 Total Parcel Size The Rifle Pit#1 Property Boundary/parcel size is 58.7 acres. 1.5 Commodity to be Mined The site has approximately 226,325 CY of(dry) sand and gravel that will be mined from the property to provide materials for future projects. The projected duration of the commercial mining activities is three to five years. 1.6 Legal Description of the Permitted Area The legal description of the Permitted Area is provided in Section 2.0. 2