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<br />structures, mining will be conducted beneath the lines. SCC will assure that equipment <br />heights do not exceed height limitations as specified in the letter from WAPA. For the <br />sake of simplicity, the area around the structures is included in the Permit Area. <br />Natural Gas Lines. There are two natural gas lines that run through or near the property <br />including one 3-inch line and one 6-inch line. The 6-inch line cuts diagonally across the <br />western section of the Permit Area. The 3-inch line runs east and west just north of the <br />Permit Area. Western Slope Gas Company holds a 50-foot wide right-of-way on each <br />gas line. SCC has agreed not to mine nearer than 30 feet to the gas lines. Here again, in <br />order not to slice up or leave windows in the Permit Area, the gas line has been included <br />within the permit boundary. <br />Telephone Lines. A telephone line runs just north of the permit boundary. This will not be <br />disturbed by mining operations. <br />Buildings. A few buildings associated with an old farmstead still remain on the site. Most <br />of the structures are in a deteriorated condition due to lack of maintenance. One <br />structure, a barn, is in relatively good condition. These structures will not be disturbed by <br />mining operations. <br />Sediment Ponds. The Permit Area straddles a minor drainage divide corresponding to <br />the eastern edge of the main WAPA 230KV powerlines which cross the site. To the east <br />of this divide, all disturbed area drainage flows to the existing sedimentation pond and is <br />discharged through CPDES Discharge Point 001. As-built drawings for the original pond <br />are provided as Exhibit G-2. As part of the initial Phase I expansion, the original <br />sedimentation pond was enlarged to handle increased drainage from the expanded <br />disturbance area. Exhibit G-3 illustrates the revised pond design configuration. Pond <br />design calculations for the existing sedimentation pond are provided in Appendix G-1. <br />Runoff from the Phase II expansion area to the west of the drainage divide will flow to a <br />new sedimentation pond and discharge through CPDES Discharge Point 002. Design <br />information and drawings for the new sedimentation pond are provided in Appendix G-4 <br />• and Exhibit G-4, respectively. A significant amount of water has accumulated in the <br />existing active pit area and ongoing pit inflows are anticipated as gravel extraction <br />D-2 Revised May 1998 <br />