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<br /> <br />' E%HIBIT D <br />H:CNING PLAN <br />' The Distel Farm Resource will be used by C & H Companies as a <br />s~~urce for concrete sands, fill material, and aggregates. The <br />applicant owns a portion of the property and holds mineral leases <br />' f~~r the remainder. The general location of the mining area is <br />along St. Vrain Creek, south of State Highway 119 and west of Del <br />C,3mino. The total area of property to be mined is 114 acres. <br />1 The Distel Farm property will be mined using dry mining <br />techniques. Any groundwater intercepted during the mining <br />operation will be pumped from the open pit and discharged to St. <br />' Vrain Creek. A stationary plant site will be located near the <br />southeast corner of the permit for processing and stockpiling <br />material. If groundwater inflow into the pit becomes to <br />' v~>luminous to handle efficiently the operator may change mining <br />methods to wet mining by dragline. <br />' Tlie material to be extracted on this property is sand and gravel. <br />Tlie nature of the stratum is typically a layer of topsoil ranging <br />from 0 to 7-1/2 feet in thickness overlaying a sand and gravel <br />deposit that ranges in thickness from 1 to 17 feet. A claystone <br /> b<:drock is encountered from 6 to 19 feet below ground. There are <br />' interspersed lenses of clays and silts deposited by St. Vrain <br /> Creek. Bore logs taken in October, 1983 encountered groundwater <br />' ai: a depth of <br />tt~e borelogs 4 to 8 feet below the ground surface. <br />were taken at a late time period of the Given that <br />year, it is <br /> reasonable to assume groundwater can be much higher during the <br /> sF>ring and su mmer months. <br />1 <br /> Tt~e sand and gravel in this area is cataloged by t he Colorado <br /> GE:ologic Surv ey in a 1974 report titled Sand, Gravel and Quarry <br />Resources; Colorado Front Range Counties. St Vrain Creek <br />deposits are recognized as a valuable mineral resource and the <br />aggregates are classified as high quality. <br />' Hi.ning will be done by phases. The land area opened for mining <br />will be limited to only that necessary to satisfy market demands. <br />Hi.neral extraction is currently projected to be 200,000 tons per <br />' year. Average material depths range from 5 feet to 17 feet of <br />material. Maximum disturbance in the open pit will be limited to <br />e acres. <br />l <br />L..~ <br /> <br />~1 <br />D-1 <br />