2018-02-05_PERMIT FILE - C1981019

• Permit No: C1981019
• IBM Index Class Name: Permit File
• Doc Date: 2/5/2018
• Doc Name: Collom Pit Dewatering Study November 2017
• Section_Exhibit Name: Exhibit 07 Item 22B
• Media Type: D
• Archive: No

October 19, 2017
LIST OF FIGURES
Page ii
Page
Figure 1. Collom Pit Location Map...............................................................................................3
Figure 2. Collom Pit Model Area..................................................................................................7
Figure 3a. State of Drawdown After 1 Year of Pumping.............................................................12
Figure 3b. State of Drawdown After 2 Years of Pumping............................................................13
Figure 3c. State of Drawdown After 5 Years of Pumping............................................................14
Figure 3d. State of Drawdown After 20 Years of Pumping..........................................................15
Figure 4a. Plan with Well Locations: AAI Scenario 1................................................................17
Figure 4b. Plan with Well Locations: AAI Scenario 2................................................................18
Figure 5. Pre -Mining and Pre -Pumping Groundwater Levels....................................................20
Figure 6a. State of Collom Pit Dewatering, Scenario 1 -After 3 Years......................................21
Figure 6b. State of Collom Pit Dewatering, Scenario 1 -After 5 Years......................................22
Figure 6c. State of Collom Pit Dewatering, Scenario 1 -After 7 Years......................................23
Figure 6d. State of Collom Pit Dewatering, Scenario 1 -After 9 Years......................................24
Figure 6e. State of Collom Pit Dewatering, Scenario 1 -After 10 Years
....................................25
Figure 6f. State of Collom Pit Dewatering, Scenario 1 -After 15 Years
....................................26
Figure 6g. State of Collom Pit Dewatering, Scenario 1 -After 20 Years
....................................27
Figure 6h. State of Collom Pit Dewatering, Scenario 1 -After 25 Years
....................................28
Figure 6i. State of Collom Pit Dewatering, Scenario 1 -After 30 Years
....................................29
Figure 6j. State of Collom Pit Dewatering, Scenario 1 -After 35 Years
....................................30
Figure 6k. State of Collom Pit Dewatering, Scenario 1 -After 38 Years
....................................31
Figure 7a. State of Collom Pit Dewatering, Scenario 2 -After 3 Years......................................32
Figure 7b. State of Collom Pit Dewatering, Scenario 2 -After 5 Years......................................33
Figure 7c. State of Collom Pit Dewatering, Scenario 2 -After 7 Years......................................34
Figure 7d. State of Collom Pit Dewatering, Scenario 2 -After 9 Years......................................35
Figure 7e. State of Collom Pit Dewatering, Scenario 2 -After 10 Years
....................................36
Figure 7f. State of Collom Pit Dewatering, Scenario 2 -After 15 Years
....................................37
Figure 7g. State of Collom Pit Dewatering, Scenario 2 -After 20 Years
....................................38
Figure 7h. State of Collom Pit Dewatering, Scenario 2 -After 25 Years
....................................39
Figure 7i. State of Collom Pit Dewatering, Scenario 2 -After 30 Years
....................................40
Figure 7j. State of Collom Pit Dewatering, Scenario 2 -After 35 Years
....................................41
Figure 8a. Plan with Well Locations and Pipelines: AAI Scenario 1 ..........................................43
Figure 8b. Plan with Well Locations and Pipelines: AAI Scenario 2 ..........................................44
Figure 9. Schematic of a Monitoring Well..................................................................................47
DISCLAIMER: This report contains professional opinions based on site visits and information
provided by the Owner. AAI makes no warranties, either expressed or implied, as to the
accuracy or completeness of the information contained herein. Identification and control of
hazardous conditions are the responsibilities of the Owner.
Agapito Associates, Inc.