2008-01-08_REPORT - C1980007

• Permit No: C1980007
• IBM Index Class Name: REPORT
• Doc Date: 1/8/2008
• Doc Name: 2006 Annual Hydrology Report
• From: HydroGeo Inc
• To: DRMS
• Annual Report Year: 2006
• Permit Index Doc Type: Hydrology Report
• Media Type: D
• Archive: No

West Elk Mine 2006 Annual Hydrology Report iii
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3.2.4 Springs above the E Seam in the Minnesota Creek and Dry Fork Drainage
Basin ....................................................................................................................... 22
3.2.4.1 Spring J-4 .................................................................................................. 22
3.2.5 New Spring Monitoring Sites Added in WY 2006 ................................................ 22
3.2.5.1 Spring 35-3 ................................................................................................ 22
3.2.5.2 Deer Creek Spring ..................................................................................... 22
3.2.5.3 Spring WCC-24 ......................................................................................... 23
3.2.5.4 Spring J-2 .................................................................................................. 23
3.2.5.5 Spring J-7 .................................................................................................. 23
3.3 Ground Water Monitoring ................................................................................................... 24
3.4 Underdrain and Mine Water Monitoring ............................................................................ 27
3.5 U.S. Forest Service Water Resources .................................................................................. 28
3.6 Surface and Ground Water Monitoring Methodology ........................................................ 29
4.0 MINE WATER MANAGEMENT ACTNITIES .................................................................................. 30
4.1 Mine Water Balance ................................................................ ............................................ 30
4.2 North Fork Water Rights ......................................................... ............................................ 32
4.3 Sanitary Wastewater ................................................................ ............................................ 32
4.4 Sedimentation Ponds ............................................................... ............................................ 36
4.4.1 Ponds MB-1 and MB-2R ........................................... ............................................ 37
4.4.2 Ponds MB-3, MB-4, and MB-5 .............................................................................. 37
4.4.3 Pond FW-1 ................................................................. ............................................ 37
4.4.4 RPE Pond .................................................................. ............................................. 37
4.4.5 Pond SG-1 ................................................................. ............................................. 37
4.5 Mine Water Inflows ............................................................... ............................................. 37
4.5.1 NW Panels Sealed Sump ........................................... ............................................. 38
4.5.2 NE Panels Sealed Sump ............................................ ............................................. 38
4.6 Mine Water Sampling ............................................................ ............................................. 38
4.7 Underground Thermal Event .................................................. ............................................. 39
4.8 Biomonitoring Testing for Toxicity ....................................... ............................................. 39
December 2007 HydroGeo, Inc.