Laserfiche WebLink
EBHIBIT D <br />MINING PLAN <br />Platte Valley Pit will be a source of fine aggregates for C & M <br />Companies in the North Denver market. Materials are suitable for <br />use in concrete, asphalt, select fill, drain material, 'and <br />roadbase. Adjacent to this site C & M presently has a ready mix <br />concrete batch plant. A portion of the material will qo directly <br />to the batch plant for the manufacture of concrete. The total <br />permitted acreage is 141 acres. Of this amount, 129 acres is <br />zoned agriculture and is included within the mining area. The <br />processing plant is on 12 acres which is zoned Industrial 3. In <br />addition, C & M Companies owns the property between this site and <br />U.S. Highway 85. <br />Presently the site is unirrigated pastureland. At some point in <br />the past, the property was also cultivated. The property does <br />cross the South Platte River onto the west side but none of this <br />area is to be affected. The property does contain some trees <br />along the South Platte River but none of these will be disturbed. <br />Over the length of the property in a north/south direction, the <br />topography drops approximately 10 to 15 #eet in one mile. The <br />mining area is located within the 100 year floodplain while the <br />processing plant is on higher ground out of the floodplain. <br />Mining will stay at least 100 feet from the bank of the South <br />Platte River. A Western Area Power Administration line crosses <br />the site .in an east/west direction. The Central Colorado <br />Conservancy District has an abandoned well field and ditch system <br />on a portion of the site. <br />The pit will be mined dry in a dewatered state. As the <br />excavation proceeds downward and reaches the groundwater table, <br />pumps will be installed which will remove the water from the pit <br />area. Exhibit C shows the location of two dewatering pumps. The <br />water will be lifted out of the pit into the concrete ditch <br />formerly used by the Central Colorado Conservancy District. This <br />ditch carries the water back to the South Platte River at the <br />location of the Weld County Road 6 bridge. The dewatering pumps <br />will be moved northward as the mining proceeds in that direction. <br />The overburden on the site is 3 to 6 feet deep and consists of <br />clay, clay loams, and silty loams. Sand and gravel resource <br />under the overburden is from 15 to 25 feet deep. The underlying <br />material is a shale and claystone bedrock. The depth of <br />groundwater is estimated to be 4 to 5 feet. <br />D-1 <br />