Laserfiche WebLink
Mine water treatment ponds (Long Pond, Tl, and T2) - The three treatment ponds are part of the <br />4.3-acre Developed Water Area that has been approved as a permanent part of the site. The ponds <br />were at operational capacity and appeazed to be functioning properly both before (April 17) and after <br />(Apri120) Mine No. 3 discharge was routed to the Long Pond. The Long Pond presumably was <br />dischazging to treatment pond T 1 via a submerged drain at the south end of Long Pond which could not <br />be seen due to the thick growth of cattails in the pond. The flow into Tl (from the Long Pond) also <br />could not be seen, presumably because the inlet of T1 was covered with algae. Tl was dischazging to <br />T2 via two pvc pipes and an earthen channel. T2 was discharging from a pvc pipe at the former CDPS <br />Outfall 001 location on the hillslope above North Thompson Creek. From the 001 pipe, the water was <br />flowing down the slope to the creek. Water in the treatment ponds appeared suitable for use by <br />livestock and wildlife, based on field pazameters measured during the inspection (see following table). <br />Table 1-Field parameters measured during the inspection. All dischazges were cleaz <br />water, with the exception of the Mine No. 3 discharge which was slightly cloudy before <br />and after routing to the Long Pond. nm =not measured. <br /> Discharge <br />E <br />T <br />p' Total Fe (mg/l, <br />Location Date (visual pH S <br />(Ju) oF <br />( ) using <br /> estimate Chemets kit <br />Mine No. 1 discharge from <br />from air shaft into N. <br />" 0 (small <br />Thompson Creek via 36 4/17/07 pool) 6.8 1434 52 run <br />culvert next to Mine No. 1 <br />ortal <br />Mine No. 1 dischazge from 4/17/07 15 7.4 2198 56 nm <br />pipe into Long Pond <br />Discharge from treatment <br />pond 2 (to North <br />Thompson Creek, former 4/17/07 15 7.2 1990 52 nm <br />CDPES outfall 001), while <br />only Mine No. 1 was <br />dischaz in to Lon Pond <br />Mine No. 3 discharge to <br />ground from pipe across <br />road from Mine No. 3 4/17/07 10 6.8 1434 56 7 <br />portal azea, before re- <br />routing to Long Pond. <br />S <br />4/18 <br />l <br />li <br />( <br />was sp <br />amp <br />e on <br />t <br />from lab sample) 4/18/07 10 7.0 1400 52 7 <br />North Thompson Creek, <br />side channel immediately <br /> <br />downstream from Mine 4/18/07 nm 7.4 269 60 0 <br />No. 3 discharge <br />5 <br />