2023-01-09_REVISION - M2021052 (29)

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IHt', Scott— Rifle (:rave Pit#? Ma,v 2022 landforms that blend with the adjacent undisturbed topography within 90 days of completion to meet Garfield County standards. Scott will start the reclamation process as soon as mining progresses throughout the site. The excavated pit will fill with water and the pond will expand as mining proceeds; therefore, reclamation effort will be focused on the creation of the 5:1 wetland slope fringe around the perimeter of the pit. This wetland slope will be created in concert with the expanding excavation,to avoid the difficulty and disruption of returning heavy equipment to areas of the pond at the conclusion of mining. 2.10.3 Division 3—Site Planning and Development Standards Section 7-301. Compatible Design The surrounding properties are primarily agricultural and industrial in use therefore should not have any compatibility issues. Section 7-302. Off-Street Parking and Loading Standards There will be adequate on-site parking for mining and construction activity, within the property owned by Scott. Section 7-303. Landscape Standards Where possible, Scott will make efforts to preserve the existing vegetation on the parcel in areas outside the mining footprint. No landscaping is proposed as the project is an Industrial use. Section 7-304. Lighting Standards There will be no exterior lighting of the proposed facility. Section 7-305. Snow Storage Standards There will be adequate area for snow removal and storage within the property, however snow removal and/or storage is expected to be limited to the Operation Pad and sales area only, since mining extraction will not occur during winter conditions due to the limitations of the wet mining approach. Section 7-306. Trail and Walkway Standards Not applicable. No permanently designated trails or walkways of any type are proposed for the site. 2.11 Floodplain Development Analysis Scott understands that when a project is located within a Special Flood Hazard Area, if there is an indication or suggestion that a project is in a SFHA, or if a project is a division of land or a PUD over 5 acres in size or proposes 50 lots or greater, the application must include a Floodplain Analysis. A hydraulic model was developed using HEC-RAS to simulate flooding effects during the 100-year flood event both before and after the proposed mining operation. Hydraulic stresses were analyzed to determine appropriate erosion control and structural characteristics of the earthen berm to withstand flood conditions. The difference between the existing and proposed WSE was computed as the rise in the WSE. A floodway encroachment analysis also determined the floodway boundary, which does not cover any portion of the parcel or Project. The floodplain vicinity map is included as Sheet 3 of Appendix C, and a summary of the model WSE results is included in Appendix H. 2-17