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exhaust discharge will be monitored to assure .-compliance with EPA standards <br /> regulating radon emissions from underground uranium .mines. . <br /> Ore Deposit Information <br /> Minable mineralization on the C-SR-11 lease block occurs within the <br /> upper or top rim portion of the Salt Wash Member of the Jurassic Morrison <br /> Formation. On the property, ore bodies within this unit range between <br /> 150 and 500 feet in depth, averaging about 4.5 feet thick and lay within <br /> a northeast-southwest trending "belt". Mineralization occurs through- <br /> out the rock unit, but is mostly concentrated within the lower portions. <br /> The top rim is underlaid by approximately 30 feet of mudstone. <br /> Operation Timetable <br /> The applicability of a timetable to an underground operation such <br /> as this is questionable. During the early stages of operations, the <br /> affected acreage will not apreciably increase after the initial distur- <br /> bance around the portal area. Small amounts of additional acreage will <br /> be involved as the waste dump expands and the ventilation bore hole is <br /> upreamed. As all the affected acreage is utilized during the mining <br /> operation, no significant reclamation can begin until the mine is closed. <br /> Expected mine life is approximately nine to ten years with ore production <br /> expected to be 34,000 tons per year. However, Cotter Corporation requests <br /> this application be approved as an "intermittent" operation with periods <br /> of inactivity in excess of 180 days. As the market for uranium and/or <br /> vanadium dictates, the mine may operate continuously at full or partial <br /> capacity under the permitted mining plan for unknown lengths of time or <br /> it may be maintained in a "ready" state for periods in excess of 180 days. <br /> -6- <br />