2023-07-19_REVISION - M2021052 (16)

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Rifle Gravel Pit#I July 2023 Hours of operation shall be Monday through Saturday 7 a.m. to 7 p.m. (Mountain Daylight Time, MDT)with no operations on Sunday. During winter months from 11/1 to 3/21 hours of operation shall be Monday through Saturday 7 a.m. to 5 p.m. (Mountain Standard Time, MST). Excavation and processing would occur approximately 8 months of the year depending on the occurrence of freezing temperatures (roughly April— November) and material sales would occur year-round. Total recoverable volume is estimated at approximately 226,325 CY of aggregate, which is expected to support operations for between three and five years. Approximately 3 to 5 employees will be on site during this phase of the mining operations. No nighttime activities are anticipated. Occasional equipment repair, or maintenance may be conducted at night, but lighting will be kept to a minimum and directed inward; the site will not have ambient lighting. 5.2.6 Existing or Proposed Roads No existing nor proposed roads will be used for the mining operation on-site. Scott will designate temporary travelways on the operating surface of the mine on a flexible and as- needed basis, to account for the changing layout of the mine as excavation proceeds. These travelways would consist of the native gravel materials exposed after removal of the overburden, supplemented with a surface of roadbase approximately 3"thick to control mud. The travelways on the working surface of the mine would not be permanently compacted, surfaced, or otherwise constructed. A portion of CR-346 (1-70 Frontage Road) will be improved as described in the pending new CDOT Access Permit(Attachment B) and used for access to and from the site. 5.2.7 Drainage and Runoff Conveyance Previous sections of this application describe the water handling activities for this proposed project. 5.2.8 Final Reclamation (Phase 4 [P4]) This section describes the minor reclamation activities and size of the areas to be worked during Phase 4, if needed. Scott will verify the final slopes using their GPS equipment as described in previous sections. The final reclaimed areas for Phase 4 include: • Reclaimed Pond Surface Area = 9.70 acres (no reclamation in Phase 4) • Perimeter Area = 3.54 acres (perimeter outside of mining areas, incidental seeding and/or weed treatment only, as needed) • Operations Pad to be maintained as storage = 1.86 acres, temporary structures removed (no reclamation in Phase 4) • Berm Area (between berm and greenbelt area), = 3.57 acres (note 2.87 acres of this area was reclaimed during Phase 1). Approximately 0.70 acres may need upland seed mix. • Wetland Area within the Perimeter Berm (to remain, no reclamation in Phase 4) _ 0.63 acres. • Greenbelt Area = 0.33 acres assumed to be fully reclaimed during Phase 3 or submerged. 32