2018-06-12_HYDROLOGY - M1988112

• Permit No: M1988112
• IBM Index Class Name: HYDROLOGY
• Doc Date: 6/12/2018
• Doc Name: Water Level Monitoring
• From: Battle Mountain Resources
• To: DRMS
• Annual Report Year: 2018
• Report Quarter_Month: May
• Email Name: LJW
• 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 05/31/2018 72.46 DRY 0.00
P7 05/31/2018 92.50 92.29 0.21
P8 05/31/2018 97.51 96.54 0.97
P9 05/31/2018 72.30 71.96 0.34
P10 05/31/2018 58.30 57.56 0.74
I'll 05/31/2018 41.80 41.38 0.42
P12 05/31/2018 41.71 41.68 0.03
P13 05/31/2018 41.34 41.04 0.30
P14 05/31/2018 41.24 DRY 0.00
P15 05/31/2018 41.10 40.85 0.25
The leak detection system at the TSF Collection Pond was inspected May 31, 2018. A total of 870 gallons
(27.2 GPD)were evacuated from the leak detection system and pumped to the LTF. The LTF underdrain
system flow was measured to be approximately 39.0 gallons per minute(gpm).
West Pit Waste Water Treatment Plant
During the month of May 2018, the West Pit Water Treatment Plant was operated under Colorado
Department of Public Health and Environment(CDPHE)CDPS Permit No. C00045675 for discharge into
the Rito Seco alluvial aquifer. During the month of May, 8,379,200 gallons (25.71 acre-feet) of treated
water was discharged to the Rito Seco. There was no water transferred from the West Pit to the LTF in
May 2018. There was no sludge transferred from the water treatment plant drying pad to the LTF.
BMRI performed the monthly visual seepage expression inspections on May 31, 2018 in the historic
seepage area identified in Figure 2 of the permit. No seepage expressions were observed in the historic
seepage area during May 2018.
BMRI 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)
BF-4 05/31/2018 24.85
BF-511 05/31/2018 30.77
BF-6 05/31/2018 30.89
M-6 05/31/2018 DRY
M-7 05/31/2018 DRY
M-8 05/31/2018 DRY
M-9 05/31/2018 DRY
M-10 05/31/2018 25.64
M-11R 05/31/2018 39.68
M-12 05/31/2018 175.02
M-13R 05/31/2018 126.07
M-14 05/31/2018 131.06
M-15 05/31/2018 91.96
M-16 05/31/2018 22.67
M-17 05/31/2018 30.56
M-18 05/31/2018 26.45
M-19 05/31/2018 26.62