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<br />(tl Surface Disturbance: The area disturbed from past operations within the affected <br />azea is estimated at approximately 4.0 acres. This area includes the existing waste piles, the <br />entries, and the access road to the south of Entry No. 3 leading to the area directly to the east of <br />the No. 5 Prospect Tunnel. For an operation lasting 20 years at an average envisioned <br />production rate of 10,000 tons per yeaz, a maximum of approximately 200,000 cubic yards of <br />waste rock will be generated and added to the waste piles. The surface area added to the existing <br />waste piles is estimated at approximately three acres. The approximate final limits of the waste <br />piles is shown on Exhibit E -Reclamation Plan Map, and the existing and final topography is <br />shown in Exhibit D -Reclamation Plan (Paragraph "b"). <br />Roads: There are no improvements or new roads envisioned for access to the <br />affected area. Access is via 3 miles of public road from the Town of Marble, then via 1800 feet <br />of private road on Sierra controlled private property to the northern edge of the affected area. <br />Access roads on site already exist from prior operations. These roads lie exclusively on the <br />waste marble piles and are shown on Exhibit E -Mining Plan Map. No significant new roads aze <br />envisioned, ahhough existing roads may be relocated slightly or extended as waste is added to <br />the piles. During the summer of 1998, CYMC constructed a new road around the east side of the <br />south waste pile area. The surface of the road was not adequately stabilized before the winter of <br />1998/1999. Sierra plans to stabilize the surface of this road with crushed rock or road base <br />material. <br />(h) Water: The primary non-potable water use at the quarry is for cooling, dust control, <br />and saw cuttings flushing of the diamond wire saws, chain saws, and drills used in the stone <br />cutting operations. Each saw (there are 6 planned) requires a steady flow of 5 to 10 gallons per <br />minute. The continuous circulation rate is estimated at a maximum of 30 gallons per minute. <br />This rate is not consumptive since the water is reused from settling ponds and sumps in the <br />quarry. Water from seepage into the quarry from surrounding formations is the source of this <br />circulating, non-potable water requvement. Past experience by CYMC indicates the quarry <br />generates excess water in the sumps during spring runoffperiods. At these times, some water <br />needs to be dischazged (see paragraph "e" above). Shown on the following page is a copy of <br />Sierra's discharge permit with the Colorado Department of Health. The discharge point <br />approved in this permit is shown on Exhibit E -Mining Plan Map and labeled as "Outfa11001:' <br />An initial sample of discharge water was taken 5/24/99. It showed the discharge water has pH <br />of 7.72, total suspended solids of 21 mg/I, and total dissolved so Gds of 137 mg/l. These results <br />are well within acceptable limits established by the Colorado Department of Heahh. Potable <br />water will be brought to the sight as required. Sanitary waste facilities will be portable toilets <br />and will not require water. No change room facilities will be located on site and no related water <br />use will be required. <br />(il Ground and Surface Water: The sediment control structure constructed by CYMC <br />has not been effective in preventing calcium carbonate fines from reaching Yule Creek at the toe <br />of the waste piles. According to CYMC personnel, a higher rate of sedimentation has occurred <br />only since the new road around the east side ofthe south waste pile was constructed in 1998. <br />17 <br />