2015-07-01_REPORT - C1980007

• Permit No: C1980007
• IBM Index Class Name: Report
• Doc Date: 7/1/2015
• From: Hydro Geo, Inc
• To: DRMS
• Annual Report Year: 2014
• Permit Index Doc Type: Hydrology Report
• Email Name: JRS
• Email Name: MPB
• Media Type: D
• Archive: No

West Elk Mine 2014 Annual Hydrology Report v
LIST OF MAPS
Map 1 E -Seam Mine Water Inflows Water Year 2014....................................In Folder
Map 2 Locations of Hydrologic Monitoring Stations......................................In Folder
LIST OF FIGURES
Figure 1.
Monthly Precipitation for Paonia 1 SW (56306) ...........................................3
Figure 2.
Monthly Precipitation for McClure Pass (59743) ..........................................3
Figure 3.
Monthly Precipitation for Overland Reservoir (59853) .................................4
11
Figure 4.
Monthly Snow Water Equivalent for Overland Reservoir .............................5
Figure 5.
Monthly Snow Water Equivalent for McClure Pass......................................5
Figure 6.
Average Daily Flow for the North Fork of the Gunnison River near
Table 6.
Somerset, CO (USGS 09132500)...................................................................7
Figure 7.
Average Daily Streamflow for Minnesota Creek near Paonia, CO
Table 8.
(USGS 09134000)..........................................................................................8
Figure 8.
Average Daily and Measured Stream Gage Height for Minnesota Creek
Table 10.
near Paonia, CO (USGS 09134000)...............................................................8
Figure 9.
Temperature Data Logger Monitoring Site Locations.................................19
Figure 10.
Mine Water Balance.....................................................................................37
LIST OF TABLES
Table 1.
Baseline and Routine Monitoring Frequencies.................................................10
Table 2.
Laboratory Parameters for First Five Years of Monitoring
(including Baseline Period
11
Table 3.
Summary of the Surface Water Monitoring Program.......................................13
Table 4.
Summary of the Temperature Monitoring Site Details.....................................18
Table 5.
Summary of the Spring and Seep Monitoring Program....................................22
Table 6.
Summary of the Groundwater Monitoring Well Characteristics ......................31
Table 7.
Summary of the Groundwater Monitoring Program.........................................32
Table 8.
Summary of the Underdrain and Mine Inflow Monitoring Program ................33
Table 9.
Summary of the U.S. Forest Service Water Resources.....................................34
Table 10.
Summary of CDPHE Limits for Outfall 007A .................................................40
Table 11.
Summary of CDPS Discharge Permit Limits for Sedimentation Ponds . ..........42
Table 12.
Summary of CDPS Discharges for WY 2014
(Adapted from WY 2014 DMRs).....................................................................43
Table 13.
Summary of Salinity Loading in the North Fork of the Gunnison River ..........
49
June 2015 HydroGeo, Inc.