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EXHIBIT D - MINING PLAN NARRATIVE (CONTINUEDI (Revised 01/06/95) Prior to beginning extraction, 6' chain link fencing will be installed where necessary to prevent access to the site. Where natural barriers, such as the South Platte River exist, no fencing will be installed. In areas where adjacent property owners have installed fencing, Cooley's fence will simply connect to the existing fencing. Two gates will be installed, one onto 88th Avenue and one onto Monaco Street at the proposed Truck Access Points. Both are shown on MINING PLAN MAP, EXHIBIT C-2. The exact location of channel improvements along the "South Platte River Berm Area" will be determined by agreement with the Urban Drainage and Flood Control District, and the State of Colorado Division of Water Resources and/or Water Court on water rights issues for the slurry wall. Prior to installation of these improvements, the agreements will be submitted to the Division of Minerals and Geology. The most probable location of the slurry wall is shown on MINING PLAN MAP, EXHIBIT C-2. The slurry wall installation consists of excavation of a trench approximately 4' wide through the gravel product strata to a minimum depth of 3' into bedrock. Visual inspection during trenching along with depth measurements are conducted to assure that the trench meets the minimum penetration requirements of 3'. Slurry/mixing holding ponds are constructed at regular intervals adjacent to the trench excavation. A consistent slurry is produced by mixing bulk bentonite and any suitable on-site clay material with local ground water in conical static mixer. The slurry product is discharged into a holding pond, and then pumped through hoses and aluminum irrigation piping to the trench section under construction. Independent engineering services are required with a daily log of construction progress during installation, including continuous on-site observation, surveying, sampling, field testing of various slurry trench parameters, and assimilation of as-built information. The product material will be excavated using backhoes, scrapers, bulldozers, and other similar equipment. It is anticipated that most of the product material will be transported by conveyor belt to the existing plant north of the South Platte River, which traverses Areas 1, 2A & 2B. Cooley will retain the right to process the material on-site and transport it off-site by truck, if necessary. Processing equipment would consist of a crusher, screens, washer, and conveyors. There may also be temporary ponds, for settling and recycling, and a scale house and small office might be set up at either of the two truck access points.