2023-08-04_REPORT - M1988112

• Permit No: M1988112
• IBM Index Class Name: Report
• Doc Date: 8/4/2023
• Doc Name: Monthly Report
• From: Battle Mountain Resources, Inc
• To: DRMS
• Annual Report Year: 2023
• Report Quarter_Month: Jul
• Email Name: LJW
• Email Name: THM
• Media Type: D
• Archive: No

Table 2-Monthly Piezometer Elevations
Monitoring Well Piezometer Depth Depth to Water Depth of Water
Identification Observation Date ft ft ft
P6 07/31/2023 72.46 DRY N/A
P7 07/31/2023 92.50 DRY N/A
P8 07/31/2023 97.51 96.65 0.86
P9 07/31/2023 72.30 71.95 0.35
P10 07/31/2023 58.30 57.47 0.83
I'll 07/31/2023 41.80 41.39 0.41
P12 07/31/2023 41.71 41.63 0.08
P13 07/31/2023 41.34 41.02 0.32
P14 07/31/2023 41.24 DRY N/A
P15 07/31/2023 1 41.10 1 40.85 1 0.25
The leak detection system at the LTF Collection Pond was inspected July 31, 2023 and 890 gallons were
evacuated from the leak detection system and pumped to the LTF. The LTF underdrain system was visually
inspected July 31,2023 and the flow rate was measured to be approximately 27.8 gallons per minute(gpm).
West Pit Waste Water Treatment Plant
During the month of July 2023, the West Pit Waste Water Treatment Plant (WWTP) was operated
intermittently (3 to 4 days per week) under Colorado Department of Public Health and Environment
(CDPHE) CDPS Permit No. C00045675 for discharge into the Rito Seco alluvial aquifer. During the
month, 7,885,800 gallons (24.20 acre-feet) of treated water was discharged to the Rito Seco and 421,700
gallons (1.29 acre-feet) of water was transferred from the West Pit to the Lined Tailing Facility (LTF).
Additionally,no water was reinfiltrated into the West Pit in May.
BMRI performed the monthly visual seepage expression inspections on July 31, 2023, in the historic
seepage area identified in Figure 2 of the permit. No seepage expressions were observed in the historic
seepage area.
BMRl measured the monthly West Pit backfill, alluvial and monitoring wells as required under in the
QA/QC Plan. Measurements obtained for the monthly wells are shown in Table 3.
Table 3-Monthly and Quarterly Groundwater Depth to Water
Monitoring Well Identification Observation Date Depth to Water
ft
BF4 7/31/2023 24.89
BF-5R 7/31/2023 30.83
BF-6 7/31/2023 30.92
M-6 7/31/2023 DRY
M-7 7/31/2023 DRY
M-8 7/31/2023 DRY
M-9 7/31/2023 141.28
M-10 7/31/2023 24.23
M-11 R 7/31/2023 39.56
M-12 7/31/2023 174.33
M-13R 7/31/2023 125.67
M-14 7/31/2023 130.5
M-16 7/31/2023 22.04
M-17 7/31/2023 29.92