PERMFILE49399

• Permit No: m2004044
• IBM Index Class Name: Permit File
• Doc Date: 8/4/2004
• Doc Name: Groundwater Model
• From: Tetra Tech RMC
• To: DMG
• Media Type: D
• Archive: No

TABLE OF CONTENTS
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1.0 INTRODUCTION ..................................................................... ...................................................1
2.0 MODEL DEVELOPMENT ....................................................... ...................................................1
2.1 Model Framework ......................................................... ................................................... l
2,2 Boundary Conditions and Water Bodies ....................... ...................................................2
2.3 Aquifer Properties ......................................................... ...................................................3
2.4 Recharge ........................................................................ ...................................................4
3.0 MODEL SIMULATIONS ......................................................... ...................................................5
3.1 Simulation Approach .................................................... ...................................................5
3.2 Pre-Mine Simulation Results ........................................ ...................................................6
3.3 Mining and Post-Mining Simulation Results ................ ...................................................7
4.0 CONCLUSIONS AND RECOMMENDATIONS .................... .................................................10
5.0 LIMITATIONS .......................................................................... .................................................11
6.0 REFERENCES .......................................................................... .................................................12
List of Firures
Figure 1 Tucson South Vicinity Map
Figure 2 Tucson South Model Area with Site Features and Boundary Conditions (Post-Mining)
Figure 3 Tucson South Area Geology
Figure 4 Groundwater Level Contours -Observed vs. Simulated Pre-Mining (Dry Season)
Figure 5 Simulated Maximum Change in Groundwater Levels, Scenario 4 (Wet Season
Figure 6 Simulated Maximum Change in Groundwater Levels, Scenario 4 (Dry Season)
Figure 7 Simulated Maximum Change in Groundwater Levels, Scenario 5 (Wet Season)
Figure 8 Simulated Maximum Change in Groundwater Levels, Scenario 5 (Dry Season)
Figure 9 Simulated Maximum Change in Groundwater Levels, Scenario 6 (Wet Season)
Figure 10 Simulated Maximum Change in Groundwater Levels, Scenario 6 (Dry Season)
Figure 11 Simulated Maximum Change in Groundwater Levels, Scenario 7 (Wet Season)
Figure 12 Simulated Maximum Change in Groundwater Levels, Scenario 7 (Dry Season)
Figure 13 Simulated Maximum Change in Groundwater Levels, Scenario 8 (Wet Season)
Figure 14 Simulated Maximum Change in Groundwater Levels, Scenario 8 (Dry Season)
Figure 15 Groundwater Level Contours -Simulated Post-Mining (Dry Season)
- i - August 2004
I:U919 019\TS GW Model\TS Report\Tucwn SouN_Rp Drafl.doc