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TABLE OF CONTENTS 1.0 -Introduction ....................................................................................................................... ................... 1 1.1 Site Description ............................................................................................................. ................... 1 1.2 Monitoring Program ....................................................................................................... ................... 4 2.0 -Monitoring Methods .......................................................................................................... ................... 8 3.0 -Hydrologic Consequences ................................................................................................. ................... 9 3.1 Water Quantity ............................................................................................................... ................... 9 3.1.1 Springs and Seeps ............................................................................................ ................... 9 3.1.2 Purgatoire River System (Streams, Ponds and Direct Discharges) .................. ................... 9 3.1.3 Groundwater .................................................................................................... ...................9 3.2 Water Quality ................................................................................................................. ................. 11 3.2.1 Springs and Seeps ............................................................................................ ................. 11 3.2.2 Surface Water (Streams, Ponds and Direct Discharges) .................................. ................. 11 3.2.3 Alluvial Groundwater ...................................................................................... ................. I 1 3.2.4 Bedrock Groundwater ...................................................................................... ................. 12 4.0 -Mitigative Measures ......................................:................................................................... ................. 20 5.0 -Monitoring Programs for 2003 .......................................................................................... ................. 21 6.0 -References ......................................................................................................................... ................. 22 FIGURES Figure 1.1-1 Generalized Stratigraphic Column of Mesozoic and Cenozoic Era Strata in the Raton Mesa Region from Dolly and Meissner, 1977 ...........................................................3 Figure 3.2-1 Golden Eagle Alluvial Wells .............................................................................................13 Figure 3.2-2 Golden Eagle Mine Wells ..................................................................................................18 TABLES Table 1.2-1 Hydrology Monitoring Requirements ........................................ ..........................................5 Table 1.2-2 Water Quality Parameter Sample Suites .................................... ..........................................5 Table 3.1-1 Golden Eagle Mine Well Data ................................................... ........................................10 Table A-1 Groundwater CCAW-1 .............................................................. ....................................A-19 TableA-2 CCAW-1 Groundwater-Historic .............................................. ....................................A-20 Table A-3 Groundwater PAW-5 ................................................................. ....................................A-23 Table A-4 PAW-5 Groundwater -Historic ................................................. ....................................A-24 Table A-5 Groundwater PAW-6 ................................................................. ....................................A-26 Table A-6 PAW-6 Groundwater -Historic ................................................. ....................................A-27 Table A-7 NM-20 (Groundwater NM-14-94) ............................................. ....................................A-32 Table A-8 Historical NM-20 Groundwater Historic ................................... ....................................A-33 TableA-9 NM-21 (GroundwaterNM-11-94) ............................................. ....................................A-35 Table A-10 Historical NM-21 Groundwater ................................................. ....................................A-36 Table A-11 NM-22 (GroundwaterNM-13-94) ............................................. ....................................A-38 Table A-12 Historical NM-22 Groundwater ................................................. ....................................A-39 Table A-13 SF-2 Groundwater ..................................................................... ....................................A-41 Table A-14 Historical SF-2 Groundwater ..................................................... ....................................A-42 Table A-15 GEM-1 ....................................................................................... ....................................A-44