Laserfiche WebLink
<br />' EXHIBIT D (Cont'd) <br />' Excavations to date indicate that the sand and gravel <br />below the overburden varies from 20 feet on the east end to <br />25 feet on the west end. Underlying the sand and gravel is <br />a relatively impermeable grey shale. The shale acts as a <br />' bottom for the pit throughout the area except in a few <br />' spots where dirty sands are encountered before the shale is <br />reached. <br />' No dewatering occurs in this pit. /It is mined wet.l No <br />water is discharged from the affected lands into the drain- <br />, age basi~(,of the Arkansas River or any other river. There- <br />fore, no Colorado Department of Health NPDES permit is <br />1 required. <br />' Fugitive dust control is not necessary because this is <br />a wet operation. Therefore, the Colorado Department of Health <br />' does not require an emission control permit. <br />' Mining Timetable <br />variable year-to-year <br />of approximately 60,0 <br />' the estimated life of <br />about 1996. The sand <br />The operator anticipates a highly <br />market. It is expected that an average <br />70 tons of material will be produced over <br />the mine and that mining will be completed <br />and gravel deposit varies between 48,000 <br /> and 60,000 tons per acre, with the average deposit being <br /> approximately 54,000 tons per acre. Thus, approximately 1.1 <br />' acres per year from an average deposit thickness of 22z feet <br /> will be mined. The following table is the estimated mining <br />' <br /> timetable. <br /> <br />7 <br />