Laserfiche WebLink
Table 2-Monthly Piezometer Elevations <br /> Monitoring Well Piezometer Depth Depth to Water Depth of Water <br /> Identification Observation Date R R ft <br /> P6 12/30/2021 72.46 DRY N/A <br /> P7 12/30/2021 92.50 92.29 0.21 <br /> P8 12/30/2021 97.51 96.58 0.93 <br /> P9 12/30/2021 72.30 71.92 0.38 <br /> P10 12/30/2021 58.30 57.58 0.72 <br /> I'll 12/30/2021 41.80 41.40 0.40 <br /> P12 12/30/2021 41.71 41.66 0.05 <br /> P13 12/30/2021 41.34 41.02 0.32 <br /> P14 12/30/2021 41.24 DRY N/A <br /> P15 1 12/30/2021 1 41.10 1 40.87 1 0.23 <br /> The leak detection system at the LTF Collection Pond was inspected December 30, 2021 and 900 gallons <br /> were evacuated from the leak detection system and pumped to the LTF. The LTF underdrain system was <br /> visually inspected December 30, 2021 and the flow rate was measured to be approximately 32.0 gallons <br /> per minute(gpm). <br /> West Pit Waste Water Treatment Plant <br /> During the month of December 2021, the West Pit Waste Water Treatment Plant (WWTP) was operated <br /> intermittently (3 to 4 days per week) under Colorado Department of Public Health and Environment <br /> (CDPHE) CDPS Permit No. C00045675 for discharge into the Rito Seco alluvial aquifer. During the <br /> month, 7,238,100 gallons (22.2 acre-feet) of treated water was discharged to the Rito Seco and 753,800 <br /> gallons (2.31 acre-feet) of water was transferred from the West Pit to the Lined Tailing Facility (LTF). <br /> Additionally, no water was reinfiltrated into the West Pit in December. <br /> BMRI performed the monthly visual seepage expression inspections on December 30,2021 in the historic <br /> seepage area identified in Figure 2 of the permit. No seepage expressions were observed in the historic <br /> seepage area. <br /> BMRI measured the monthly West Pit backfill, alluvial and monitoring wells as required under in the <br /> QA/QC Plan. Measurements obtained for the monthly wells are shown in Table 3. <br /> Table 3-Monthly and Quarterly Groundwater Depth to Water <br /> Monitoring Well Identification Observation Date Depth to Water <br /> ft <br /> BF-4 12/30/2021 24.80 <br /> BF-511 12/30/2021 30.73 <br /> BF-6 12/30/2021 30.86 <br /> M-6 12/30/2021 DRY <br /> M-7 12/30/2021 DRY <br /> M-8 12/30/2021 DRY <br /> M-9 12/30/2021 141.22 <br /> M-10 12/30/2021 24.37 <br /> M-11R 12/30/2021 38.59 <br /> M-12 12/30/2021 174.55 <br /> M-13R 12/30/2021 125.67 <br /> M-14 12/30/2021 130.77 <br /> M-16 12/30/2021 23.51 <br /> M-17 12/30/2021 30.09 <br />