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Affected areas not to be mined: 29.4 acres Three areas(on Map C-1)located on the west/northwest slope
<br /> of the Hills include a part of the existing access road (FSR-650). This area is a buffer zone for noise, dust, light, and
<br /> visual impacts from Piedra Road, the USFS facility, and residential areas to the West. Although no extraction of
<br /> construction materials is proposed,operations are expected to have some minor effect on the land.The objective is to
<br /> protect the dense stand of trees and natural condition of this area.
<br /> Stockpiles: up to 7.5 acres (included in the above total) outside the plant area. Long-term stockpiles
<br /> (anticipated life greater than 1 year) will be protected against water and wind erosion, by revegetation or crusting
<br /> agents, with preference to revegetation. These include the stockpiles serving as berms for stormwater runoff/run-on
<br /> control along the perimeter for the duration of the mining operations and associated with the roads and swales to detain
<br /> water and prevent discharge.
<br /> As much as possible, overburden (not including soil) and reject materials from processing will be used for
<br /> reclamation by relocation to previously mined areas and backfilled and graded to final contours as much as possible.
<br /> Soil will then be placed as quickly as possible on areas with final post-reclamation contours.This minimizes overburden
<br /> and soil placed in perimeter berms and speeds up reclamation. In addition,clean backfill material,including earth, rock
<br /> (particularly shale), concrete and asphalt rubble may be brought to the site as backhaul to be stockpiled and then
<br /> processed as recycled construction materials or to use as backfill to the reclamation grade. Such material will meet
<br /> State and landowner requirements for inspection and certification as clean. Contaminated materials will not be used.
<br /> Plant Area: 13.2 acres During all phases the Plant Area is expected to be at the same location,in the saddle
<br /> between Oakbrush Hill and North Oakbrush Hill, expanding from the 6.1 acres (pre-permitting) to 13.2 acres (part of
<br /> the 132.3 acres total). The landowner and operator reserve the option to relocate the plant to another location (or
<br /> establish a secondary plant and stockpile site) in one of the mining areas, even if that may require disturbing freshly
<br /> reclaimed areas, in progress or released. This may be necessary to reduce environmental impact(dust generated by
<br /> haul roads,fuel),improve safety,reduce use of overland conveyors,and provide for temporary location of ready-mixed
<br /> concrete or hot-mix asphalt facilities for limited times certain for projects.
<br /> The plant area includes 3-6 acres for plants and equipment(including portable plants and vehicles),3-6 acres
<br /> for raw material and product stockpiles and access (including storage of road salt and salt-sand mixtures for road
<br /> deicing,fuel,and other materials),and 1-2 acres for long-term stockpiles of soil and overburden,plus space for parking
<br /> and access.This will mostly include existing roads and areas stripped and prepared or excavated out during pre-permit
<br /> operations. (The soil and overburden from this area was graded and leveled prior to permitting and is already in
<br /> stockpiles which will be expanded during the permitted operation.)The soil/overburden stockpile will be shaped to form
<br /> berm(s)and retention/infiltration basins and swales downslope from the plant area.These berms will also reduce visual
<br /> impacts to the east, together with trees kept standing between the plant site and the property boundary to the east.
<br /> Map C-1 and APEN information (Exhibit M) show some configurations, but these are subject to change due to
<br /> equipment and customer demand.Areas with water-priority and hazardous materials will be protected to prevent illicit
<br /> discharge or release,
<br /> Excavation/extraction/processing: Initially, loaders will remove material from the working face and feed
<br /> directly into the processing plant. Since portable plants will be used, the plant configuration may change each year.
<br /> Based on production levels,portable overland conveyors or pit trucks may also be used to haul from the working face
<br /> to the plant and a primary crusher may be used at the conveyor feed point. As much as possible, the floor of the
<br /> excavation will be left at final grade as mining progresses, minus or with replacement of about 3 feet of overburden
<br /> including 3 inches of soil. Berms and shallow swales may be placed for storm water and erosion control, mostly
<br /> temporary and frequently relocated. Those on the perimeter generally will be part of final reclamation. If wash water
<br /> sediment ponds are necessary,these will be located as much as possible in the plant area,or in areas being reclaimed.
<br /> No ground water is expected to be exposed in mining, due to the locations: in Phase 1 the lower edge of the area to
<br /> be mined is about elevation 7960, Phase 2 elevation 7880, Phase 3 elevation 7920, and Phase 4 elevation 7840 well
<br /> above any streams and with depths of 20 feet or so,well above wellheads located to the north, east, and southeast.
<br /> Scheduling: Excavation, processing, and related activities will not be carried out on a year-around basis.
<br /> Weather and other factors will limit excavation of processing to a single"processing season"of six to ten weeks(50+
<br /> days) sometime during the period of mid-April through mid-October. Hauling will be done on an extended schedule,
<br /> C&J Gravel Products, Inc. Page 14 of 93 20 OCT 2021
<br /> Application for Permit: Oakbrush Hill Gravel M-2021- C&J-DPR-V5-001
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