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• Fhe design of the stormwater controls have taken this value into account to provide for the safe containment and <br />passage of such an event without causing harm to the Tailings Impoundment and to control sedimentation. <br />At the 10 year/24-hour Peak Flow, the Sedimentation Collection Pond discharge weir is designed to pass +/- 2.43 <br />cfs (1,090 gpm), or 3W,0', during the one hour spike time. However, a storage volume of 0.13 acre-ft (42,000 gal.) is <br />provided for containment below the weir to give sufficient time for settling any sediment. <br />10 year/24-hour Storm Event, Peak Discharge <br />Pro)oc[ NUMB Gulch Mtlr :rto )7 SM, <br />`.M?e,a: Alp?.wMrt Tiga rhOeri .... r. Y, <br />C0? -rSNW ?MtlweW Cuvertei'-Nevv -nitaYr,V Wrn?NVYYeb>Y <br /> <br />42189 <br />d3 °Y <br />Appendix to Exhibit C <br />1. Sampling and Lab analysis of proposed waste stream, solids and liquids <br />2. Current lab analysis of Big 5 Tunnel Discharge, for establishment of baseline data <br />3. Explanation ol'Significant DifTerences Big Five Tunnel Discharge <br />4. USGS Bulletin 1208, Plate 3, Geologic Section Along the Big Five Tunnel, Idaho <br /> Colorado <br />5. US EPA Record of Decision, ROD R08-88/019, 1988 <br />6. CO DMG "Reclamation Feasibility Report - Virginia Canyon", December 2001 <br />7. FF.MA Flood Plain Map (Map tf0801900093D effective March 19, 2007) <br />8. Well Map Locations, CO Division of Water Resources <br />9. CSM Edgar Mine Well Log <br />10. Wildeman's Water I landbook for Metal Minintt <br />0 1 1. Serfilco Model 432 pH Monitor/Recorder submittal <br />12. MSDS data for proposed chemicals to be used in milling operations <br />18