REP41946

• Permit No: C1980007
• IBM Index Class Name: Report
• Doc Date: 4/17/2007
• Doc Name: 2005 Annual Hydrology Report to Section 8.0
• From: Hydro Geo Inc
• To: DRMs
• Annual Report Year: 2005
• Permit Index Doc Type: Hydrology Report
• Media Type: D
• Archive: No

•
Final West Elk Mine 2005 Annual Hydrology Report iv
5.1.2 Impacts to the North Fork of the Gunnison River 36
5.2 Springs and Seeps 37
5.2.1 Impacts to Water Quantity and Quality 37
5.3 Impacts to Stock Ponds and USFS Water Resources 38
5.4 Ground Water
38
5.4.1 Impacts to Ground Water Quantity and Quality 38
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6.0 ADEQUACY OF THE MONITORING PROGRAM 40
6.1 Mining Related Hydrologic Impacts 41
7.0 SUMMARY 42
8.0 REFERENCES 44
Table 1. Monitoring Frequencies ................................................................................ .................... 6
Table 2. Summary of Surface Water Monitoring ...................................................... .................... 8
Table 3. Summary of the Spring and Seep Monitoring Program ............................... ...........13 - 14
Table 4. Summary of the Ground Water Monitoring Program ................................... .................. 21
Table 5. Summary of the Groundwater Monitoring Well Data .................................. .................. 22
Table 6. Summary of the Underdrain and Mine Inflow Monitoring Program ............ .................. 23
Table 7. Summary of U.S. Forest Service Water Sources ........................................... .................. 24
Table 8. CDPS Effluent Limitations for the WWTP (007A) ....................................... .................. 29
Table 9. Summary of CDPS Discharges for Water Year 2005 .................................... ........... 30 - 31
Table 10 . Summary of Sedimentation Pond Discharge CDPS Permit Limits ............. .................. 32
Table 11 . Summary of Salinity Loading in the North Fork of the Gunnison .............. .................. 37
LIST OF TABLES
September 2006 HydroGeo, Inc.