2021-10-29_PERMIT FILE - M2021064 (6)

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prevention sediment runoff,with infiltration to ground water and through unmined alluvial materials(above shale)to the watershed of Dutton Creek.There will be no surface discharge with a 100-year-frequency or less precipitation(3.7 inches in 24 hours). MINED, UNMINED, AND DISTURBED AREAS: Within time constraints imposed by the County and assuming customer demand, between 69 and 132 acres will be mined,of 167.2 acres in the permit,and 299 acres in the contiguous portion of the Dutton Ranch parcel.An additional 35 to 60 acres will be affected but not necessarily mined. The entire 167.2 acres will not be actively mined or affected at one time: reclamation will progress with mining. Buffer zones inside the permit boundary and on the parcel will (among other uses)provide for biological reservoirs for trees,grass and forbs for reseeding of species not in seed mix. Generally, areas below natural elevation of 7880 feet(north)7920 (south)on the western slope of Oakbrush Hill and North Oakbrush Hill will not be significantly disturbed by operations. Three areas in the parcel are not intended to be mined or disturbed,except for the existing access road (FSR-650): o The southwest area, along CR-600 and west of Oakbrush Hill. Like the extreme western edge of the permit, it is a buffer zone. o A 200-foot buffer zone on a portion of the northern boundary of the site,to provide a buffer for neighboring landowners, and provide for a biological reservoir. o A 200-foot buffer zone on a portion of the eastern boundary, again to provide a buffer for neighboring landowners, and provide for a biological reservoir. The area to be mined may vary, based on quality and quantity of material, demand, and the current Archuleta County limit of 20 years. Some areas with too much overburden and too-thin deposits of materials being mined may be left in place and undisturbed, but cannot be predicted or shown at this time. Mining consists of the following tasks: 1. Cut timber and grub woody species, and beneficial use of that material as much as possible. 2. Strip and conserve soil in stockpiles(initially)or to place on backfilled areas with loaders. 3. Remove and relocate overburden to stockpiles(initially)or backfill areas with loaders/dozers. 4. Remove the raw material (pitrun) with loaders and/or backhoes/trackhoes; Large boulders, when encountered, may require use of pneumatic hammers to break up for crushing. (No explosives will be used.) 5. Move the pitrun by conveyor,loader or truck directly to plant or to stockpiles to feed the processing plant. 6. Screen,crush,and/or wash materials(by portable plants),and place in stockpiles in the plant area prior to shipping from site or use in on-temporary site plants(such as ready-mix or hot-mix plants). 7. Place excess materials (overburden, fines, reject, and oversize) and clean waste materials brought on-site, by loader for backfilling and compaction, generally as soon as possible and as material is made available to final slopes. 8. Maintain environmentally sound and safe and healthful conditions on site during these operations while preventing negative impacts off site. 9. Prevent environmental degradation constantly during operations by applying best management practices and responding immediately to incidents. 10. Frequently inspect for and correct for problems. C&J Gravel Products, Inc. Page 16 of 93 20 OCT 2021 Application for Permit: Oakbrush Hill Gravel M-2021- C&J-DPR-V5-001