PERMFILE43298

• Permit No: C1981012A
• IBM Index Class Name: Permit File
• Doc Date: 12/11/2001
• Section_Exhibit Name: EXHIBIT 08 HYDROLOGY AND GEOLOGY INFORMATION
• Media Type: D
• Archive: Yes

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TABLE OF CONTEIJTS
Page
LIST OF FIGURES ............................................... ii
LIST OF 7ABLE5 ................................................ iii
SUMMARY AND CONCLUSIONS ....................................... 1
INTRODUCTION .................................................. 3
GEOLOGIC SETTING .............................................. 3
Stratigraphy ............................................. 4
Structure and History .................................... 1
Geomorphology ............................................ B
HYDROLOGIC SETTING ............................................ 10
GROUND WATER .................................................. 14
Bedrock Studies .......................................... 15
Mathematical Estimate of Maxwell Mine Inflows............ 24
Computation of Model Parameters ..................... 27
Computation of Inflows .............................. 30
Alluvial Studies ......................................... 31
WATER QUALITY ................................................. 35
Maxwell Mine ............................................. 35
Allen Mine ............................................... 42
Climatic Summary .................................... 44
~ Potential Evapotranspiration ........................ 44
Surface lJater Budget ................................ 49
Subsurface Water Budget ............................. 49
Hydrologic Balance Summary .......................... 50
Effect of Dump on Stream Quality .................... 50
Deterioration of Stream Quality Not Related to Maxwell
and Allen Mines ........................................ 55
HYDROLOGIC BALANCE ............................................ 56
Bedrock Ground lJater ..................................... 56
Stream and Near-Surface Ground Waters .................... 58
MONITORING PROGRAM ............................................ 59
REFERENCES CITED .............................................. 60
APPENDICES
A HYDRAULIC PROPERTIES OF CORE SAMPLES
B AQUIFER TEST DATA AND COMPLETION DETAILS