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will be near vertical, although this slope will later be backfilled with overburden and naturals to a slope of 3H:1 V.
<br />Area "E" will generate 242,242 cubic yards of topsoil, overburden and waste material. Of the 242,242 cubic yards,
<br />37,100 cubic yards of topsoil will be stockpiled in a berm along the northern, western and southern perimeter of
<br />the excavation; 25,230 cubic yards of overburden will be stockpiled in Area "F" for backfilling Area "E". The
<br />surplus material (including waste) of 179,912 cubic yards will be used to backfill the pond in Area "F". Mining of
<br />the raw sand and gravel from Area "D" is expected to yield 440,440 cubic yards. Subtracting 5% for waste leaves
<br />418,418 cubic yards of sand and gravel to be sold.
<br />Area "F" will generate 167,198 cubic yards of topsoil, overburden and waste material. The topsoil and overburden
<br />material will be stockpiled in Area "A". Of the 167,198 cubic yards, 33,120 cubic yards is required to backfill Area
<br />"F". The surplus 134,078 cubic yards (including waste) will be used to backfill the pond in Areas "E" and "F". Any
<br />excess material not required to reclaim the site will be sold. Area "E" combined with Area "F" will be reclaimed as
<br />a pond. The mined pit slopes will be near vertical, although this slope will later be backfilled with overburden and
<br />naturals to a slope of 3H:1 V.
<br />The following table depicts the available overburden, raw aggregate and generated waste for the individual
<br />extraction areas.
<br />
<br />
<br />EXTRACTION
<br />
<br />AREA
<br />
<br />MINING
<br />
<br />AREA
<br />ACRES
<br />ESTIMATED
<br />OVERBURDEN
<br />
<br />QUANTITY
<br />C.Y. ESTIMATED
<br />RAW
<br />SAND &
<br />GRAVEL
<br />QUANTITY
<br />C.Y. ESTIMATED
<br />5% WASTE
<br />RAW SAND
<br />
<br />AND GRAVEL
<br />C.Y. ESTIMATED
<br />USEABLE
<br />SAND &
<br />GRAVEL
<br />QUANTITY
<br />C.Y. REQUIRED
<br />TOTAL
<br />RECLAMATION
<br />
<br />MATERIAL
<br />C.Y. AVAILABLE
<br />TOTAL
<br />RECLAMATION
<br />
<br />MATERIAL
<br />C.Y.
<br />A 13.8 122,452 236,840 11,840 225,000 359,292 134,292
<br />B 14.5 169,602 239,782 11,989 227,793 22,730 161,591
<br />C 15.4 161,495 378,891 18,945 359,947 30,400 180,439
<br />D 14.5 163,753 491,260 24,563 466,697 54,840 186,316
<br />E 13.0 220,220 440,440 22,022 418,418 62,330 242,242
<br />F 9.8 150,201 339,929 16,996 322,933 33,120 167,198
<br />TOTAL 81.0 1,115,741 2,380,110 119,006 2,261,105 1,144,965 1,234,747
<br />CRUSHING AND STOCKPILE AREA -All gravel processing of the excavated material will occur within the
<br />identified staging/process area. The screened or crushed material will be stockpiled nearby according to size in
<br />an area separate from overburden and topsoil stockpiles, and the mining area.
<br />ASPHALT PRODUCTION - A portable asphalt plant may be erected on the site from time to time. Material
<br />crushed on site will be used for asphalt production. Maximum production for the portable plant is 4000 tons per
<br />day. Asphalt production is seasonal and normally occurs between March and November. The plant meets or
<br />exceeds all State and Federal pollution requirements, and is inspected on a regular basis by corporate and
<br />governmental authorities. Components associated with the asphalt plant include: liquid asphalt storage,
<br />aggregate feed bins, mixer, conveyors, lime silo, truck loading equipment, power supply and distribution.
<br />CONCRETE PRODUCTION - A portable concrete batch plant may be erected on the site from time to time. Peak
<br />production will be 100 cubic yards per hour. The plant can operate year round.
<br />HAUL ROAD -The primary roads and access serving the site are well maintained and are in good repair. Access
<br />to the site is gained from 29 Ys Road and D Road. Anew paved driveway will be constructed at a point 400 feet
<br />south of D Road and west of 29 Yz Road. A fully channelized intersection will be constructed at the existing 29 '/z
<br />Road and D Road intersection. Based on current conditions, 50 percent of the traffic utilizing the facility will travel
<br />westerly on D Road to Ninth Street, and north to Ute Avenue, then west. The remaining 50 percent will travel
<br />east on D Road to either 30 Road and north, or 32 Road and north or south. It is not known at this time what
<br />effect the 29 Road improvements will have on traffic accessing Orchard Mesa and north to the Interstate 70
<br />Business Loop. Bear in mind that any sand and gravel operation is sensitive to market conditions and the
<br />community growth areas that it serves. Therefore, uncertainty is inherent with any traffic forecasts for a sand and
<br />gravel operation. Given the maximum production of the crushing, asphalt and concrete plants, coupled with the
<br />available trucks, it is estimated that a peak of 30 trips per hour will utilize the haul route during maximum
<br />production. Two types of trucks will be used: 60 percent of the loads will be 10 yard dump trucks with a
<br />Revised October, 2002
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