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Figure 13-1 shows a cross-section of the installation. The double pipe system <br />has been designed to route a potential leak through the pile without major <br />erosion. The drain daylights at the toe of the pile. <br />A standby discharge point from the Roadside Mine will be from CDPS permit No. <br />CO-0027146, outfall 002. The flow is piped through the seal of the old <br />Northwest Intake portal. The water flows through a 6" polyethylene pipe which is <br />buried from the portal south a distance of 300' along 1-70 to a CDOT culvert. <br />The 6" pipe is extended under the highway through the CDOT culvert and out <br />through a meter to the Colorado River. Discharge points are shown on Exhibit <br />17. This pipeline will remain in place after reclamation to provide a backup <br />method to dewater the Roadside Mine. <br />Two areas associated with RSS use alternate sediment control. These areas <br />are the A and B Substations located to the east of the operations areas. During <br />the fourth quarter of 2002, B Substation was removed and the area reclaimed. <br />During August 2007, A Substation was removed. Both reclaimed areas were <br />extensively roughened, seeded, mulched. Two short silt fences were installed as <br />alternate sediment control at substation B. One silt fence was installed as <br />alternate sediment control at substation A. A grass filter design is presented in <br />Appendix 14-6 beginning on page 147. The grass filter design demonstrates the <br />two short silt fences located at substation B are no longer required. <br />CAMEO REFUSE DISPOSAL AREA 2 (CRDA 2) <br />Runoff above CRDA 2 is diverted around the pile by an upper diversion ditch <br />which was constructed during 2002. Runoff from the refuse pile is directed to <br />Pond 10. Collection ditches are maintained along the east and west edges of <br />the pile to route water to the pond and terrace drains on the face of the pile direct <br />flow to the collection ditches. Culverts are installed under Haul Road 4 to route <br />the water to Pond 10. See Exhibit 51, Table 13-4 and Appendix 13-2 for details. <br />13-13 (Rev. 11/08)