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EXHIBIT D <br />Mining Plan <br />Aggregate Industries proposes amending the can-ent approved Platte Valley Operation Mined <br />Land Reclamation Board 112 Reclamation Permit (M-89-120). The Platte Valley Operation is <br />located in Weld County, Colorado, just east of the community of Wattenberg. The site is <br />immediately east of the South Platte River, west of State Highway 85, and between Weld County <br />Road (WCR) 2 and WCR 6. <br />Sand and gravel will continue to be the primary product produced from the Platte Valley <br />Operation. The principal intended use for the sand and gravel is for construction aggregates. <br />The current aggregate mining operation includes an office and a processing facility for screening, <br />crushing, and washing of aggregate material. Aggregate Industries presently has a ready mix <br />concrete batch plant adjacent to the site and a portion of the material currently goes directly to <br />the batch plant for the manufacture of concrete. Other permitted mining operations are <br />immediately south and north of the site and additional permitted mining operations are adjacent <br />to the property west of the South Platte River. The dominant non-mining land use surrounding <br />the property is agricultwe. <br />Presently, the areas proposed for amendment aze used for the existing concrete batch plant and <br />un-irrigated pastureland. At some point in the past, the un-imgated pastweland was also <br />cultivated. The current permitted property does cross the South Platte River onto the west side, <br />but none of this area is to be affected. The property contains some trees along the South Platte <br />River, but these have not been disturbed during the current mining and will not be disturbed in <br />the proposed amendment area. The mining area, including portions of the proposed amendment <br />area, is located within the 100-year floodplain of the South Platte River, however, the office, <br />processing plant, and concrete batch plant will remain on higher ground out of the floodplain. <br />Current mining within the permitted boundary and additional borehole drilling and testing in the <br />proposed amendment azea have verified that the Platte Valley Operation property contains a <br />significant commercial deposit of sand and gravel. The depth of the soil and overbwden ranges <br />from less than 3 feet to 6 feet and consists of clay, clay loams, and silty/sandy loams. The depth <br />of the aggregate material ranges from 15 feet to 25 feet below the overburden material. The <br />underlying material is a shale and claystone bedrock. <br />The amended permit boundary would be an increase of about 49 acres, vacating about 18 acres <br />on the southern end of the existing permit and adding approximately 67 acres to the east (see the <br />Pre-MininglMining Plan Map, Exhibit C). The resulting permit boundary will encompass <br />approximately 190 acres with about 133 acres being mined. The remaining area mainly consists <br />of the processing plant and office space, setbacks, and road and utility right-of--ways. Aggregate <br />Industries will maintain a 25-foot minimum setback from the proposed permit boundary and a <br />100-foot minimum setback from the South Platte River. A minimum setback of 25 feet will be <br />maintained from the Central Colorado Water Conservancy District (CCWCD) wells located <br />within the amended permit boundary. The CCWCD conveyance ditch may be relocated during <br />mining and reclamation activities. Roads, fences, and other structures located within the <br />P[a[fe Halley Operafion <br />DMG L2 Permil Amendment <br />Page 4 <br /> <br />