2014-01-22_PERMIT FILE - M2013064 (10)

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RESERVE CALCUI ATIONS Preliminary reserve calculations on the I -Taney pwpeaty were obtained using the following assumptions: • The limit of mining was set back from the east and south property boundary by 50 feet, from the top of the ditch by 35 feet and from the river by 100 feet. • The area would be mined using 2H:1 V slopes around the perimeter. • The existing ground elevation is an average of4615 feet. • Based on the limited site visit, we did not exclude any area due to wetlands. • We used 1.5 tons per cubic yard to calculate the "gross" sand and gravel tonnage. • To account for unmarketable fines, the gross tons are reduced by 8% to obtain the "saleable, product. • Four acres were reserved for the current property owners house and limited con-Ws for horses and cattle. • Approximate locations of tree buffers were determined from the site visit and an aerial photo • The approximate location of a gas well and associated storage tank was determined from the site visit and an aerial photo. Mining Cell Area — 60 acres Overburden Volume -- 247,300 cubic yards Mining Volume - 3,285,300 cubic yards Mining Volume — 4,927,950 tons (gross) Saleable Volume — 4,533,700 tons It is possible that gravel reserves are deeper in this area than the bore logs indicate. This area is known to have clay lenses and potential reserves at 60 to 70 feet. Holes H -7 and H -14 passed through clay lenses and are at opposite sides of the property. Re- drilling at a couple of locations may be prudent to verify this. SI'Z'E ACCESS This site is bounded on two sides by two -lane asphalt roads. This area is unincorporated Weld County, but is very close to town. It is unknown at this time who is responsible for the road maintenance, Greeley or Weld County. Potential haul routes could be either directly west on 16'' Street to SH 85, north on Fern Avenue to Highway 263 then west to SH 85, or south on Fein to pick up SH 34 back to SH 85. Using I6t° to the west may be a concern as there arc numerous residential properties between this site and the highway. Additional truck traffic could be a major concern. It is not luiown if the bridge currently existing over the river on Fenn Ave. is sufficiently rated to allow hauling of material in that direction.