2016-07-21_REPORT - C1980007

• Permit No: C1980007
• IBM Index Class Name: Report
• Doc Date: 7/21/2016
• From: Mountain Coal Company
• To: DRMS
• Annual Report Year: 2015
• Permit Index Doc Type: Hydrology Report
• Email Name: LDS
• Email Name: JRS
• Media Type: D
• Archive: No

West Elk Mine 2015 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...................................1
l
Table 7.
Summary of the Groundwater Monitoring Program......................................................12
Table 8.
Summary of the Underdrain and Mine Inflow Monitoring Program ............................13
Table 9.
Summary of Surface Water Quality Parameters Elevated 10 Percent or More
above Baseline Maximum Values.................................................................................15
Table 10.
Summary of Spring and Seep Water Quality Parameters Elevated 10 Percent or
More above Baseline Maximum Values......................................................................18
Table 11.
Summary of Well Quality Parameters Elevated 10 Percent or
More above Baseline Maximum Values........................................................................21
LIST OF APPENDICES
Appendix A Surface Water - Flow Data ...............................................
Appendix B Surface Water - Hydrographs...........................................
Appendix C Surface Water - Laboratory and Field Water Quality
Data Attached
Appendix D Springs - Hydrographs ....
Appendix E Springs - Laboratory and Field Water Quality Data ...............
Appendix F Wells - Water Level Elevation Graphs ...................................
Appendix G Wells - Laboratory and Field Water Quality Data ..................
Appendix H Mine Water — Laboratory and Field Water Quality Data
(Note: No mine water met sampling criteria in WY 2015) ....
Appendix I Surface Water - Temperature Data .........................................
Appendix J Surface Water - Temperature Graphs .............
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June 2016 HydroGeo, Inc