PERMFILE65376

• Permit No: M2005033
• IBM Index Class Name: Permit File
• Doc Date: 8/7/2006
• Doc Name: Response to adequacy review
• From: WSI Weiland Inc.
• To: DMG
• Media Type: D
• Archive: No

TABLE OF CONTENTS
Page
1.0 INTRODUCTION .......................................................................................1
2.0 MODEL PURPOSE AND DESIGN ............................................................1
2.1. Model Discretization And Methods ......................................................... 1
2.2. Hydro-Stratigraphic Units ....................................................................... 1
2.2.1. Upper Silt and Loess Layer ......................................................... 2
2.2.2. Lower Gravel Aquifer ................................................................... 2
2.3. Aquifer Characterization ......................................................................... 2
2.4. Input Parameters ................................................................. ................... 3
2.4.1. Hydraulic Conductivities ............................................ ..................3
2.4.2. Big Thompson River ................................................. ................... 3
2.4.3. West Pit Dewatering ................................................. ................... 3
2.4.4. West Pit Reclamation ................................................ .................. 4
2.4.5. East Pit Dewatering ................................................... ..................4
2.4.6. East Pit Reclamation ................................................ ................... 4
2.5. Dewatering Yield Discharge ................................................. ..................4
2.6. Model Boundary Conditions ................................................. ..................4
2.7. Model Calibration And Steady State Simulation ................... .................. 5
3.0 MODEL OUTPUT ...................................................................................... 7
3.1. Existing Water Table .......................................... ....................................7
3.2. Dewatering West Pit (900 gpm) ......................... .................................... 7
3.3. Dewatering East Pit (850) 9Pm .......................... .................................... 7
3.4. Reclamation Conditions ..................................... .................................... 7
4.0 STUDY CONCLUSIONS ...........................................................................9
4.1. Pumping Conditions Impacts On LWWTP ............................................. 9
4.2. Reclamation Impacts On LWWTP ..........................................................9
4.3. Impacts On Surface And Ground Water ................................................. 9
4.4. Impacts On Existing Wells ...................................................................... 9