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<br />The underground portions of the quarry receive water from faults in the marble, primarily <br />in eazly summer. This water is generally retained within the settling sumps in the quarry. But <br />during high runoffperiods, some water discharge will be pumped from the sumps. The quality <br />of the water in the sumps has been monitored periodically by the Colorado Department of <br />Health. Records indicate no water quality problems and none aze expected in the future. CYMC <br />operated the quarry under Permit No. CO-G-500184 issued by the Colorado Department of <br />Health. Sierra has received a new Process Water and Stormwater permit from that agency <br />(Permit No. COG-500356). The maximum flow from the quarry is estimated at 33 gpm (0.13 <br />cfs) during the high flow season, so there should be no noticeable impact on Yule Creek from <br />such discharge. <br />The sediment control structure constructed by CYMC at the toe of the waste pile was <br />observed in June of 1999 to be ineffective in preventing sediment from the waste piles from <br />reaching Yule Creek. Sierra determined that quarry discharge water should not be pumped into <br />the waste pile as had been CYMC's practice. Sierra sought, and received, an amendment to its <br />discharge permit from the Colorado Department of Health so that Sierra can discharge the quarry <br />water directly into Yule Creek. <br />Based on a site visit in early June of 1999, CDMG's staff has identified problems with, <br />andlor possible violations of CYMC's permit with the CDMG. Even though Siena has included <br />areas of potential violations within the affected area for this permit, Siena will not perform any <br />activity that may impact the areas of potential damage until such damage is corrected by CDMG <br />or CYMC. <br />(d1 Wildlife: Based on recent contact with the Colorado Division of Wildlife, there are <br />no critical or important wildlife habitats or wildlife species that will be impacted by the proposed <br />operation. A letter from the Division to that effect is attached. <br />13 <br />