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West Elk Mine 2011 Annual Hydrology Report iv <br />4.0 MINE WATER MANAGEMENT ACTIVITIES 41 <br />4.1 Mine Water Balance 41 <br />4.2 Water Rights 43 <br />4.3 Sedimentation Ponds 43 <br />4.3.1 Ponds MB -1 and MB -2R 43 <br />4.3.2 Ponds MB -3, MB -4, and MB -5E 44 <br />4.3.3 Ponds FW -1 and FW -2 44 <br />4.3.4 RPE Pond and NSSA Pond 44 <br />4.3.5 Pond SG -1 44 <br />4.3.6 Mine Water Treatment Polishing Ponds 44 <br />4.3.7 WWTP Polishing Pond 45 <br />4.4 Mine Water Inflows 45 <br />4.4.1 NW Panels Sealed Sump 45 <br />4.4.2 NE Panels Sealed Sump 45 <br />4.5 Colorado Department of Public Health and Environment, Colorado <br />Discharge Permit System (CDPS) Summary 45 <br />4.5.1 CDPS Permit CO- 0038776 45 <br />4.5.1.1 Outfall 007 Amendments 45 <br />4.5.1.2 Outfall 017 Amendments 46 <br />4.5.1.3 Bio- Monitoring Testing for Toxicity 46 <br />4.5.2 Sanitary Wastewater 46 <br />4.5.3 Sedimentation Ponds 47 <br />4.6 Permit Compliance 48 <br />4.6.1.1 Outfall 007 (Waste Water Treatment Pond (WWTP) 48 <br />4.6.1.2 Outfalls 005, 008, and 009, 48 <br />4.6.1.3 Outfall 014 48 <br />4.6.1.4 Outfall 015 48 <br />4.6.1.5 Outfalls 004 and 016 51 <br />4.6.1.6 Outfalls 011, 012, 013, 017,018 and 019 51 <br />5.0 ASSESSMENT OF MINE - INDUCED HYDROLOGIC IMPACTS AND <br />ANTICIPATED IMPACTS IN WY 2011 51 <br />June 2012 HydroGeo, Inc. <br />