REP36643

• Permit No: C1981018
• IBM Index Class Name: Report
• Doc Date: 2/2/1998
• Doc Name: 1997 AHR
• Annual Report Year: 1997
• Permit Index Doc Type: HYDROLOGY REPORT
• Media Type: D
• Archive: No

' TABLE OF CONTENTS
' 1.0 INTRODUCTION .................................................... 1
' 2.0 SUMM ARY OF HYDROLOGY MONITORING DATA ........................... 2
2.1 Description of the Deserado Mine Hydrologic Monitoring Program ......... 2

' 2.1.1 Surface Water Monitoring Program ..........................
2.1.2 Ground Water Monitoring Program ........................... 2
4
2.2 Summary and Analysis of Deserado Mine Hydrology Data ................. 5
2.2.1 Surface Water Data ...................................... 6
' 2.2.2 Ground Water Monitoring Data .............................. 6
2.2.2.1 Alluvial Water Level Data ........................... 6
' 2.2.2.2 Alluvial Water Quality Data .......................... 7
2.2.2.3 Bedrock Water Level Data ........................... 7
' 2.2.2.4 Bedrock Water Quality ........... • ................
2.2.2.5 Mine Water Balance .. 11
11
2.2.2.6 NPDES Discharges and Whole Effluent Testing .......... 14
' 2.2.2.7 Whole Effluent Toxicity (WET) Testing .................. 14
2.3 Red Wash Alluvial Monitoring Program ............................ 16
' 3.0 HYDROLOGY AND MINE DEVELOPMENT ................................ 18
3.1 Mining Related Hydrologic Impacts ............................... 18
' 3.2 Comparison of Projected Impacts With Observed Impacts .............. 18
3.3 Significance of Impacts to Use of Water ........................... 19

' 3.4
3.5 Effectiveness of Mitigation Measures ..............................
Changes Necessary to Minimize Impacts ...:....................... 19
20

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