2025-04-11_REVISION - M1988112 ‎(2)‎

• Permit No: M1988112
• IBM Index Class Name: Revision
• Doc Date: 4/11/2025
• Doc Name Note: Appendix D Thru Attachment E Binder 2 of 2
• Doc Name: Request For Amendment To Permit
• From: Battle Mountain Resources, Inc.
• To: DRMS
• Type & Sequence: AM4
• Email Name: LJW
• Email Name: THM
• Email Name: EL1
• Media Type: D
• Archive: No

BASE MODEL PITWALL MODEL UPFLOW MODEL
SOURCE OF
GROUNDWATER FLOW PERCENT PERCENT PERCENT
GPM OF TOTAL GPM OF TOTAL GPM OF TOTAL
SIMULATION 6 PARTIAL CUTOFF WALL WITH WATER TO TREATMENT21
UPFLOW N/A N/A 16.5 27.6%
Recharge 1.0 2.7% 1.5 2.5% 1.0 1.7%
z Santa Fe 0 0 0
• Precambrian 15.5 41.8% 25.0 42.3% 17.3 28.9%
J
• Upper Alluvium 0.1 0.3% 2.0 3.3% 1.4 2.3%
North Pit 20.4 55.2% 30.7 51.9% 23.6 39.4%
TOTAL FLOW IN 37.0 59.2 59.8
Water to 20.0 54.1% 50.0 84.5% 50.0 83.6%
treatment
I-
0 Santa Fe 0.7 1.9% 0.5 0.8% 0.5 0.9%
O Precambrian 0.03 0.1% 0 0
J
'L Upper Alluvium 16.3 43.9% 8.7 14.7% 9.3 15.5%
TOTAL FLOW OUT 37.0 59.2 59.8
SIMULATION 7 FULL CUTOFF WALL WITH WATER TO TREATMENT
UPFLOW N/A N/A 16.5 25.4%
Recharge 1.0 1.7% 1.5 2.3% 1.0 1.6%
z Santa Fe 0.1 0.1% 0 0.003 0.004%
O Precambrian 19.1 31.8% 25.7 39.8% 17.9 27.5%
J
Upper Alluvium 10.5 17.5% 3.9 6.1% 3.4 5.2%
North Pit 29.5 49.9% 33.4 51.8% 26.2 40.3%
TOTAL FLOW IN 60.3 64.4 65.0
Water to treatment 60 99.5% 60 93.1% 60 92.4%
D Santa Fe 0 0.3 0.5% 0.6 0.5%
0
• Precambrian 0 0 0
O
u. Upper Alluvium 0.3 0.5% 4.1 6.4% 4.6 7.1%
TOTAL FLOW OUT 60.3 64.4 65.0
1) A portion of groundwater is extracted from the West Pit and sent to water-treatment plant and subsequently
discharged to Rito Seco.
2) Total groundwater flow to interceptor trench is from the upper alluvium, and West pit where interceptor trench is
located within the West pit zone.
4