2023-07-19_REVISION - M2021052 (12)

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Rifle Gravel Pit#1 July 2023 • Total area = 19.63 acres (Permitted Area) See Section 6 for additional information regarding reclamation of the property. 5.3 Mining Timetable At this time, the proposed mine would operate daily, with excavation and processing occurring 8 months of the year(roughly April— November). Total recoverable volume is estimated at approximately 226,325 CY of aggregate, which is expected to support operations for between three and five years. The estimated schedule for preparing, mining, and reclaiming this site is as follows: • Site development and grading (Phase 1) -August- September 2023 • Mining preparation (Phase 2) - September—October 2023 • Mining extraction and Greenbelt Reclamation (Phase 3)- November 2023— December 2026 to December 2028 • Final Reclamation (Phase 4) - December 2026 to 2028 Table 2 provides a range of the duration of mining by phase/stage, estimated nature, depth and thickness of the deposit to be mined and type of overburden to be removed. Attachment C includes the exploratory boring logs and material information. 6.0 Exhibit E — Reclamation Plan The specific elements of Scott's Reclamation Plan are addressed in the following sections per the guidelines outlined in Rule 6.4.5 and as informed by referral agencies (described in earlier sections of this document). Reclamation will occur within the 19.00 acres of the Affected Lands. The entire extent of the Permitted Area, with the exception of the Operations Pad, will be restored back to natural conditions upon completion of mining, including the removal of all temporary structures (office, vault and haul toilets, potable water, screen, crusher, equipment). The site will be graded to compliment the surrounding topography and a shallow 5:1 slope greenbelt area around the pond boundary addresses concerns voiced by USFWS and CPW regarding animal entrapment danger, while also meeting Garfield County gravel pit reclamation standards. Areas disturbed by grading will be contoured so they can be revegetated and will be revegetated to stabilize the surface from erosion. These areas are generally limited to the area in between the perimeter berms and the greenbelt area and outside the perimeter berm. A six-foot wide greenbelt area with a 5:1 slope will be left at the inner edge of the perimeter berm and planted with wetland reclamation species during Phase 3. The intention is for the six-foot wide greenbelt area to be nearly inundated during high-water periods as the water table rises, and then to be progressively exposed as the water table drops during the growing season. The remainder of the pit slope to the bottom of the pond will not exceed 3H:1 V slopes and will be verified using GPS equipment. Note that this reclamation effort follows Garfield County LUC standards (LUC Section 7-1002.11-1) and is not intended to serve as formal wetland mitigation per US Army Corps of Engineer's standards, which do not apply to this project. 33