2013-07-02_REPORT - C1980007 ‎(3)‎

• Permit No: C1980007
• IBM Index Class Name: REPORT
• Doc Date: 7/2/2013
• Doc Name: 2012 Annual Hydrology Report
• From: Hydro Geo, Inc
• To: DRMS
• Annual Report Year: 2012
• Permit Index Doc Type: Hydrology Report
• Email Name: JRS
• Email Name: DIH
• Media Type: D
• Archive: No

West Elk Mine 2012 Annual Hydrology Report v
LIST OF FIGURES
Figure 1.
Monthly Precipitation Data for Paonia 1 SW ( 56306) .......... ..............................3
Figure 2.
Monthly Precipitation Data for McClure Pass (59743) ........ ..............................3
Figure 3.
Monthly Precipitation Data for Overland Reservoir (59853) .............................4
Figure 4.
Monthly Snow Water Equivalent Data for Overland Reservoir .........................5
Figure 5.
Monthly Snow Water Equivalent Data for McClure Pass .... ..............................5
Figure 6.
Average Daily Flow Data for the North Fork of the Gunnison River near
Table 6.
Somerset, CO (USGS 09132500) ......................................... ..............................6
Figure 7.
Average Daily Stream Flow Data for Minnesota Creek near Paonia, CO
Table 8.
(USGS 09134000) ................................................................. ..............................7
Figure 8.
Temperature Data Logger Monitoring Site Locations ......... .............................20
Figure 9.
Mine Water Balance ............................................................. .............................39
LIST OF TABLES
Table 1.
Baseline and Routine Monitoring Frequencies .................... .............................10
Table 2.
Laboratory Parameters for First 5 Years of Monitoring (including Baseline)..I
I
Table 3.
Summary of the Surface Water Monitoring Program .......... .............................13
Table 4.
Summary of the Temperature Monitoring Site Details ........ .............................19
Table 5.
Summary of the Spring and Seep Monitoring Program ....... .............................23
Table 6.
Summary of the Groundwater Monitoring Well Characteristics ......................32
Table 7.
Summary of the Groundwater Monitoring Program ............ .............................33
Table 8.
Summary of the Underdrain and Mine Inflow Monitoring Program ................34
Table 9.
Summary of the U.S. Forest Service Water Resources ........ .............................35
Table 10.
Summary of CDPS Limits for Outfall 007 .......................... .............................42
Table 11.
Summary of CDPS Discharge Permit Limits for Sedimentation Ponds ...........
44
Table 12.
Summary of CDPS Discharges for Water Year 2012 (Adapted from WY 2012
DMRs) .................................................................................. .............................45
Table 13.
Summary of Salinity Loading in the North Fork of the Gunnison ...................52
June 2013 HydroGeo, Inc.