2018-09-18_HYDROLOGY - M1988112

• Permit No: M1988112
• IBM Index Class Name: HYDROLOGY
• Doc Date: 9/18/2018
• Doc Name: Water Level Monitoring
• From: Battle Mountain
• To: DRMS
• Annual Report Year: 2018
• Report Quarter_Month: Aug
• 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 08/30/2018 72.46 DRY N/A
P7 08/30/2018 92.50 92.29 0.21
P8 08/30/2018 97.51 96.60 0.91
P9 08/30/2018 72.30 71.96 0.34
P10 08/30/2018 58.30 57.57 0.73
I'll 08/30/2018 41.80 41.38 0.42
P12 08/30/2018 41.71 41.68 0.03
P13 08/30/2018 41.34 41.03 0.31
P14 08/30/2018 41.24 DRY N/A
P15 08/30/2018 41.10 40.85 0.25
The leak detection system at the TSF Collection Pond was inspected August 30, 2018. A total of 860
gallons (28.7 GPD) were evacuated from the leak detection system and pumped to the LTF. The LTF
underdrain system flow was measured to be approximately 34.0 gallons per minute(gpm).
West Pit Waste Water Treatment Plant
During the month of August 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 August, 6,946,000 gallons (21.3 acre-feet) of treated
water was discharged to the Rito Seco. There was 380,200 gallons (1.17 acre-feet) of water transferred
from the West Pit to the LTF in August 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 August 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 August 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 08/30/2018 24.89
BF-511 08/30/2018 30.79
BF-6 08/30/2018 30.90
M-6 08/30/2018 DRY
M-7 08/30/2018 DRY
M-8 08/30/2018 DRY
M-9 08/30/2018 141.62
M-10 08/30/2018 26.30
M-11R 08/30/2018 39.04
M-12 08/30/2018 175.14
M-13R 08/30/2018 126.02
M-14 08/30/2018 131.13
M-15 08/30/2018 93.10
M-16 08/30/2018 23.20
M-17 08/30/2018 30.48