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• <br />control structure is reestablished, nor will Sierra dump waste blocks in any azea where CYMC <br />may have caused damage that is a problem and/or possible violation of its permit. <br />Expansion of the waste piles will requve some timber cutting, primarily to the south and <br />east of the existing piles. Trees will be cut before blocks are allowed to impact these azeas. The <br />wood will be cut for firewood or stockpiled for use in fencing or other quarry operations <br />purposes. An attempt will be made to recover topsoil from these areas to be stockpiled for later <br />reclamation efforts. <br />(d) Thickness of Deposit: The marble to be quarried is approximately 300 feet thick <br />(true perpendiculaz thickness) in the vicinity of the affected azea. The marble seam dips to the <br />west at approximately 53 degrees with a strike of approximately North 26 degrees West. <br />(eI Mioina Oaeration Comaooents: The primary components of the operation within <br />the affected area consist of the existing quarry portal entry driven by CYMC in 1990, three large <br />historic quarry entries from eazlier operations, a quarry water discharge system, access roads, <br />marble waste piles, and a sediment control structure. There also exists a 10,000 gallon diesel <br />fuel tank and asemi-trailer mounted diesel-electric generator on the site. No significant <br />additions to facilities or roadways are envisioned for Sierra's operations. Sierra may elect to <br />move the generator trailer from its current location on the surface to a location underground. All <br />of these components are shown on Exhibit E: Mining Plan Map. <br />During spring runoffperiods, excess water seeps and drains into the quarry from cracks <br />in the mazble formation. This water is of high quality and is pumped out of the quarry during the <br />spring runoff season at a rate that has never exceeded 33 gallons per minute (according to <br />CYMC discharge records filed with the state). Water is stored underground in settling ponds and <br />is used in the stone cutting operations for dust control and cooling. Excess water is pumped to <br />Yule Creek at a point dvectly east of Quarry Entry No. 3. A 1.5 inch plastic pipe has been laid <br />from Entry No. 3 for dewatering. This pipe will be buried. Continuous 24 hour Pumping <br />volumes will not exceed 33 gallons per minute. <br />Sierra plans to allow public access to the quarry entries during operations, when such <br />access will not endanger quarry personnel or the public, and if the access trail is open to the <br />public. Sierra will take appropriate measures to protect both quarry personnel and the public. <br />Such measures will include fencing azound the active waste dump azeas, temporary or permanent <br />fences in the quarry entries, and warning signs and fences to discourage public access to unsafe <br />areas. Portions ofthe fencing installed by the CDMG's IMP program remain. However, Sierra <br />will install temporary fencing (chain link as well as split rail with wire) in some azeas. The total <br />amount of temporary fencing is estimated at a maximum of 500 lineal feet. These temporary <br />fences will be removed and some will be replaced with permanent fencing as described in <br />Exhibit D -Reclamation Plan. <br />16 <br />