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<br />EXHIBIT D -MINING PWN <br />This section follows the requirements outlined in Section 6.4.4. <br />Mining Methods <br />Aggregate Industries, West Central Region, Inc. (Aggregate) will mine the site in six phases. The <br />mining sequence will begin in phase one and continue in order through phase six. There will be a <br />processing plant located north of St. Vrain Creek. The plant will include processing equipment, <br />material stockpiles, a wash pond, and settling ponds. <br />Equipment <br />Truck traffic on site will be minimal due to the use of a conveyor belt system. Equipment in the <br />processing azeas will include front end loaders, scrapers, dozers, backhoes, haul trucks, crushing and <br />washing equipment, generators and support equipment, such as pickup trucks, water trucks, <br />maintenance equipment and trailers. Idle equipment will be parked on-site. Equipment storage will <br />not cause erosion, landslides, or other hazardous conditions. It is anticipated that the number of each <br />piece of equipment will vary according to demand. <br />Proposed Miring Process for Each Section <br />Before mining commences, Aggregate will install a dewatering trench around the area to be mined. <br />This water will be pumped into a settling pond. Aggregate will obtain a discharge permit before <br />discharging water and comply with all Colorado Department of Public Health and the Environment <br />(CDPHE) regulations including monitoring and reporting requirements. <br />After the section is dewatered, scrapers will strip the topsoil and overburden and stockpile it along <br />the perimeter of the area to be mined. The overburden will ultimately be used in reclaiming and <br />sloping the shore. Excess overburden will be sold. Next, sand and gravel will be excavated by front <br />end loader and transported to the appropriate processing plant by a conveyor belt system. There the <br />material will be screened, crushed, washed and stockpiled to await transportation to its final <br />destination. The stockpiles will be situated to reduce noise created during the operation. This wit] <br />also reduce the visual distraction caused by moving equipment. <br />Concurrent reclamation will be occumng throughout the mining process. Subsequent pod stripping <br />and dewatering activities will begin approximately 90 days prior to final removal of the gravel <br />materials in the current pod. <br />Ho:vs of Operation <br />Mining operations will be conducted year round, Monday through Friday, 7 a.m. to 7 p.m. or <br />daylight to dazk, whichever is more restrictive, with shut-down periods for bad weather and plant <br />maintenance. Only hauling and equipment maintenance will be allowed on Saturdays. <br />Processing Imported Material <br />Aggregate may process materials imported from other sites. <br />AGGREGATE INDUSTRIES, INC. - FREDSTROM SITE 112 PERMIT PAGE -13- <br />