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6. Excavation will be above the water table.
<br />7. Slopes for edges of the pit, including the edges along the pipeline easement, will be 2:1 and will be cut as
<br />mining progresses, rather than cutting a highwall and using part of the highwall to provide material for the
<br />final slope.
<br />8. Pit floors will slope to the west (towards the river) and will allow precipitation to infiltrate; no surface
<br />discharge or impoundment is planned. Ephemeral ponds may exist during mining, based on slopes, stages
<br />of mining, and the need to control and prevent sediment runoff, with infiltration to ground water and through
<br />unmined alluvial materials (above shale) to the river.
<br />MINED, UNMINED, AND DISTURBED AREAS:
<br />A total of approximately 62.6 acres will be mined, or 61% of the total site /permit area.
<br />These areas, totaling 40.0 acres, will not be mined:
<br />1. All areas below natural elevation of 6640, approximately 40 feet above the high water mark (HWM) of the
<br />San Juan River and Rio Blanco, and approximately 60 to 90 feet behind that HWM, and also 200 feet from
<br />the east bank of the irrigation ditch. This will form a buffer zone to protect the river, ensure that the Harris
<br />Irrigation Ditch and riverine wetlands are not impacted, and provide for visual impact mitigation.
<br />2. A 200 -foot buffer zone on the north, east, and south boundaries of the site, to provide a buffer for
<br />neighboring landowners (and visual impact mitigation), and provide for reservoirs for grass and forbs for
<br />reseeding of species not in seed mix.
<br />In addition to the area being mined, a portion of the 150 -foot access lane west of the River, (1.60 acres, including
<br />0.42 for a permanent road), will be affected by the permanent access road construction, and stockpile areas, not
<br />including areas.
<br />STRIPPING AND MINING TECHNIQUE:
<br />STRIPPING: Soil, and overburden (subsoil and pockets of loam, silt and clay) is expected to be quite variable, as
<br />defined by standard NRCS methods. All soil on the mining areas is expected to have a significant amount of large
<br />materials (cobbles and smaller stones, 4 -inch and larger).
<br />Following harvest of timber and grubbing of woody species, the soil, with grasses and forbs, will be stripped
<br />using scraper, dozer, and /or loaders. Soil may be screened to remove roots and larger materials for processing and
<br />sale or use, and to improve use for reclamation. After screening, for the first year ( + / -), soil will be placed in a
<br />stockpile at a convenient location for long -term storage and protection of soil. In following years, soil will be moved
<br />to directly to reclaim areas or, when necessary very short -term (4 -6 month) stockpiles on the pit floor before moving
<br />to reclamation. No excess soil is anticipated.
<br />In general, the stripping will be done on a yearly basis. There will be no discharge of storm water from a
<br />stripped area (except for the access road improvements, if necessary) without first flowing through a sediment basin
<br />and other storm water controls; most storm water will infiltrate into the ground directly, or flow overland into
<br />temporary closed basins to infiltrate; rather than discharge on the surface. The goal is zero discharge from disturbed
<br />and un- reclaimed areas, in accordance with the Surface Water Management Plan (SWMP).
<br />MINING: Mining will be conducted in one to three cuts, each not exceeding 30 feet in depth. Exact depth will vary to
<br />ensure proper drainage, convenient reclamation to an acceptable slope, and to allow for storm water control during
<br />and after mining. No dewatering is anticipated.
<br />Mining consists of:
<br />1. Cutting of timber and grubbing of woody species;
<br />2. Stripping and conserving soil;
<br />3. As necessary, removing and relocating overburden to backfill areas or stockpiles;
<br />4. Removing the raw material with loaders and /or backhoes /trackhoes;
<br />5. Moving these excavated materials by loader or truck directly to plant or to stockpiles for the screening and
<br />crushing (processing) plant;
<br />C &J Gravel Products, Inc. Page 16 01 JAN 2015
<br />Application for Permit: Two Rivers Pit M -2015- C &J- TRP -V5 -001
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