2016-12-01_PERMIT FILE - C1980007 ‎(6)‎

• Permit No: C1980007
• IBM Index Class Name: Permit File
• Doc Date: 12/1/2016
• Doc Name: Hydrologic Characterization of the South of the Divide
• Section_Exhibit Name: Exhibit 71
• Media Type: D
• Archive: No

HYDROLOGIC CHARACTERIZATION AND MONITORING PLAN
4.3 Groundwater Monitoring Program........................................................................27
4.4 Underdrain and Mine Water Monitoring...............................................................29
4.5 U.S. Forest Service Water Resources....................................................................29
5.0 REFERENCES..................................................................................................................31
LIST OF MAPS
Plate 1. West Elk Mine — Hydrologic Monitoring Network ................................................ attached
LIST OF TABLES
Table 1. Summary of Stream Water Quality Data for the SOD and DFL Areas ...........................3
Table 2. Summary of Spring Water Quality Data for the SOD and DFL Areas ...........................6
Table 3. Summary of Groundwater Monitoring Well Characteristics...........................................9
Table 4. Summary of the SOD and DFL Areas Groundwater Quality Data...............................10
Table 5. Baseline and Routine Monitoring Frequencies..............................................................13
Table 6. Laboratory Parameters for First Five Years of Monitoring
(including Baseline Period)..........................................................................................14
Table 7. Summary of the Surface Water Monitoring Program....................................................16
Table 8. Summary of the Spring and Seep Monitoring Program................................................21
Table 9. Summary of the Groundwater Monitoring Well Characteristics...................................27
Table 10. Summary of the Groundwater Monitoring Program.....................................................28
Table 11. Summary of the Underdrain and Mine Inflow Monitoring Program ............................29
Table 12. Summary of the U.S. Forest Service Water Resources................................................30
LIST OF APPENDICES
Appendix A Technical Memo - 2016 Recommended Modifications to the West Elk Mine
Hydrologic Monitoring Network and accompanying CDMRS Adequacy Letter
Appendix B Water Year 2015 SOD and DFL Areas Surface Water Quality and Flow Data
Appendix C Water Year 2015 SOD and DFL Areas Spring and Seep Water Quality and Flow
Data
Appendix D Water Year 2015 SOD and DFL Areas Well Water Quality and Flow Data
Revised 09/07- PR12; 08/16- TR139 HydroGeo, Inc