2009-05-19_REVISION - M1977285 ‎(28)‎

• Permit No: M1977285
• IBM Index Class Name: REVISION
• Doc Date: 5/19/2009
• Doc Name: EPP amendment ‎(AM-03)‎ Hydrogeologic Evaluation Attachment O ‎(part 9)‎
• From: Denison Mines
• To: DRMS
• Type & Sequence: AM3
• Email Name: RCO
• Media Type: D
• Archive: No

Hydrogeological Evaluation of Sunday Mines Group
Table of Contents
? Contents ,
1.0 Introduction ........................................................................................................1-1
1.1 Purpose of Investigation ........................................................................1-1
1.2 Location of Mine Facilities ....................................................................1-1
1.3 Regulatory Background .........................................................................1-2
1.4 Organization of Report ..........................................................................1-2
2.0 Geologic and Hydrogeologic Characteristics ...............................................2-1
2.1 Geologic Setting 2-1
2.1.1 Phisio rah 2-1
2.1.2 Regional Stratigraphy .............................................................2-1
2.1.3 Structural Geology .................................................................. 2-4
2.2 Local Geologic Framework ................................................................... 2-5
2.2.1 Sunday and Carnation Mines ................................................2-5
2.2.2 St. Jude Mine ............................................................................ 2-6
2.2.3 West Sunday Mine .................................................................. 2-6
2.2.4 Topaz Mine .............................................................................. 2-6
2.3 Regional Hydrogeologic Framework .................................................. 2-7
2.3.1 Climate ......................................................................................2-7
2.3.2 Surface Water ...........................................................................2-8
2.3.3 Groundwater ............................................................................2-9
2.4 Local Hydrogeologic Framework ...................................................... 2-12
2.4.1 Potential Aquifers in Area of Sunday Mines Group ........ 2-12
2.4.1.1 Sunday and Carnation Mines .............................. 2-13
2.4.1.2 St. Jude Mine ..........................................................2-14
2.4.1.3 West Sunday Mine ................................................ 2-14
2.4.1.4 Topaz Mine ............................................................ 2-15
2.4.2 Potential Water-Bearing Fracture Zones ............................ 2-15
2.4.3 Direction and Rate of Groundwater Flow ......................... 2-16
2.4.3.1 Area of Underground Workings ........................ 2-16
2.4.3.2 Surface Affected Areas .........................................2-17
2.4.4 Naturally Occurring Geochemical Conditions ................. 2-19
2.4.5 Groundwater Quality ........................................................... 2-20
2.4.5.1 Regional Groundwater Quality .......................... 2-20
2.4.5.2 Local Groundwater Quality ................................ 2-21
2.4.6 Existing and Future Uses of Groundwater........ 2-25
3.0 Conclusions .........................................................................................................3-1
4.0 References .........................................................................................................4-1

7:\84986-Denison Mines\Task Order 3 - DMO Sampling and Analysis Plan\Task 3.14 - Hydrogeology Report\final sunday hydro reporNexITINAL Sunday Hydrogeology Report.doc