2017-07-11_REPORT - C1980007

• Permit No: C1980007
• IBM Index Class Name: Report
• Doc Date: 7/11/2017
• Doc Name: Annual Hydrology Report
• From: Mountain Coal Company, LLC
• To: DRMS
• Annual Report Year: 2016
• Permit Index Doc Type: Hydrology Report
• Email Name: LDS
• Email Name: JRS
• Media Type: D
• Archive: No

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West Elk Mine 2016 Surface Water and Groundwater Quantity and Quality Data Summary
LIST OF TABLES
Table 1.
Baseline and Routine Monitoring Frequencies................................................................. 2
Table 2.
Laboratory Parameters for First Five Years of Monitoring (including Baseline Period) . 3
Table 3.
Summary of the Surface Water Monitoring Program.......................................................
5
Table 4.
Summary of the Temperature Monitoring Site Details .....................................................
6
Table 5.
Summary of the Spring and Seep Monitoring Program ....................................................
8
Table 6.
Summary of the Groundwater Monitoring Well Characteristics....................................11
Appendix E
Table 7.
Summary of the Groundwater Monitoring Program.......................................................12
Appendix F
Table 8.
Summary of the Underdrain and Mine Inflow Monitoring Program..............................13
Appendix G
Table 9.
Summary of Surface Water Quality Parameters Elevated 10 Percent or More above
Appendix H
Mine Water — Laboratory and Field Water Quality Data ...........................
Baseline Maximum Values.............................................................................................15
Appendix I
Table 10.
Summary of Spring and Seep Water Quality Parameters Elevated 10 Percent or
Appendix J
Surface Water - Temperature Graphs.........................................................
More above Baseline Maximum Values.........................................................................19
Table 11.
Summary of Well Water Quality Parameters Elevated 10 Percent or More above
BaselineMaximum Values.............................................................................................22
LIST OF APPENDICES
Appendix A
Surface Water - Flow Data.........................................................................
Attached
Appendix B
Surface Water - Hydrographs.....................................................................
Attached
Appendix C
Surface Water - Laboratory and Field Water Quality
Data.............................................................................................................
Attached
Appendix D
Springs - Hydrographs................................................................................
Attached
Appendix E
Springs - Laboratory and Field Water Quality Data ...................................
Attached
Appendix F
Wells - Water Level Elevation Graphs .......................................................
Attached
Appendix G
Wells - Laboratory and Field Water Quality Data ......................................
Attached
Appendix H
Mine Water — Laboratory and Field Water Quality Data ...........................
Attached
Appendix I
Surface Water - Temperature Data.............................................................
Attached
Appendix J
Surface Water - Temperature Graphs.........................................................
Attached
June 2017 HydroGeo, Inc