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<br />of waste materials in the area immediately east of the main quarry portal (outside the affected <br />area) where it might have the opportunity to move onto the Yule Lode Claim <br />Expansion of the waste piles will require some timber cuttingily to the south and <br />east of the existing piles. Trees will be cut before blocks aze allowed to impact these azeas. The <br />wood will be cut for firewood or stockpiled for use in fencing or other quany 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 area. The marble seam dips to the <br />west at approximately 53 degrees with a strike of approximately North 26 degrees West. <br />(el Minine Oaeration Comaoneots: The primary components of the operation within <br />the affected area consist ofthe existing quarry portal entry driven by CYMC in 1990, three large <br />historic quarry entries from earlier 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. <br />Should this occur, Sierra will use an existing buried steel fuel supply line from the existing <br />surface fuel tank through the existing utility tunnel (just south of the main quarry portal). A final <br />underground location for the generator has not been chosen. <br />During spring runoffperiods, excess water seeps and drains into the quarry from cracks <br />in the marble 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 directly 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 />vohrmes 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 around the active waste dump areas, temporary or permanent <br />fences in the quarry entries, and warning signs and fences to discourage public access to unsafe <br />azeas. Portions of the fencing installed by the CDMG's IMP program remain. Approximately <br />100 lineal feet of chain link fencing exists in the quarry entries where IMP fencing has been <br />removed. Sierra will maintain these fences and add up to SOO lineal feet of temporary lodgepole <br />pine and bazbed wire fencing to prevent public access to hazardous areas around the waste <br />dumps. In the reclamation phase, these temporary fences will be removed and the_temporary <br />16 <br />