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EXHIBIT D - MINING PLAN <br /> The information provided in this Exhibit is intended to satisfy the requirements outlined in Section 6.4.4 of <br /> the Colorado Mined Land Reclamation Board Construction Material Rules and Regulations: <br /> (a) Description of the method(s)of mining to be employed in each stage of the operation as <br /> related to any surface disturbance on affected lands; <br /> The permit area includes a significant deposit of sand and gravel located in the alluvium of the <br /> South Platte River in Weld County. The site is located west of Highway 66, north of Weld <br /> County Road 40.5, and east and south of the South Platte River. It encompasses 544.06 <br /> acres(plus or minus)and consists of four slurry wall lined pits, an unlined Siltation Pond, and <br /> two Fresh Water Ponds. <br /> Site Preparation: <br /> Initial disturbance on the property will be stripping overburden from Fresh Water Pond 1 and <br /> the Siltation Pond to establish the plant footprint and construction of site berms. Mining will <br /> then commence in these phases once the plant has been established. <br /> During preparation of the Plant, Fresh Water Pond and Siltation Pond, roads will be <br /> established from the entrance to the plant area. <br /> Mining: <br /> Scrapers will strip the topsoil and overburden material from a given phase and place stockpiles <br /> in the processing area. Any excess material not needed for reclamation may be sold or <br /> hauled off-site during the life of the mine. There will be no mining below the groundwater table <br /> until the slurry wall is complete,tested and approved for each slurry wall lined cell. For unlined <br /> cells,there will be no mining below the groundwater table until an approved Substitute Water <br /> Supply Plan(SWSP) has been obtained. <br /> Each slurry wall lined phase will be dry-mined using scrapers,bulldozers,front-end loaders, <br /> excavators,or similar equipment. The Fresh Water Pond and Siltation Pond will be unlined an <br /> wet mined with excavators. <br /> Mining at the site will progress in five major stages comprised of minor phases expected to last <br /> approximately 37 years.A map depicting the phases can be found in Exhibit C-5. <br /> Processing: <br /> The material will be wet screened and transported offsite by truck. No crushing is planned at <br /> the site. The processing area will be located on the north side of the siltation pond, east of <br /> Cell 4. <br /> Import Material: <br /> The Operator may import material from and export material to other sites. The applicant is <br /> aware that in accordance with Rule 3.1.5(9)of the Construction Material Rules and <br /> Regulations, if any offsite material is used as backfill, a notarized letter will be submitted to the <br /> Division indicating the materials are inert. The applicant will supply such a letter to the <br /> Division if,at the time of Reclamation,the applicant intends to use off-site material as backfill. <br /> (b) Earthmoving; <br /> Monarch DENM—Gravel Mine—MLRB 112 Permit Amendment <br /> Exhibit D-1 <br />