2011-03-14_REPORT - C1982056 (3)

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spring of 2011. TCC will be upgrading additional stations in 2011. Additional flow meters may also be added in 2011 and 2012. Foidel Creek: Four surface flow monitoring sites on Foidel Creek (in the vicinity of the TCC mine portals and facilities areas) are utilized. Site 800 and site 14 are located upstream of the portal. Site 8 is located a short distance downstream of the portal area and is monitored in conjunction with alluvial well 001-5-5. Site 900 is located further downstream on Foidel above the confluence with Middle Creek. Former site 304 was located further downstream of 900. Site 304 was eliminated in 2003 per TR03-42. Tables 33 through 36 provide summaries of the 2010 Water Year data collected at each site. Tables 33a, 34a, and 35a provide POR statistical summaries of collected data at each site. Figures 52 to 59 and 102 to 105 provide graphical representations of water levels and selected water quality parameters recorded at each site. Typical flow patterns were exhibited at these sites with spring runoff periods accounting for the peak flows observed. At all of these sites, the inverse relationship between flow and field conductivity continues to be evident. Water quality parameters for these sites were within previously established ranges. An increase in conductivity at site 8 has been noted over the last two years. This is attributed to increased discharge from Pond D, resulting from overflows from the Area # 1 Pit (via DRMS site 7), which is partially fed by mine water as part of mine dewatering operations for the old WMD and EMD. Fish Creek: Nine surface flow monitoring sites are utilized on Fish Creek. Site 16A replaced site 16 in 2000, and is located upstream of the Fish Creek Borehole discharge site 115. Historical data for site 16 may be found in previous AHRs. Site 307 is located approximately one mile downstream of the Fish Creek Borehole mine dewatering site and is monitored in conjunction with alluvial well 006-AZ-3. Site 302 is located approximately two miles downstream of the Fish Creek Borehole mine dewatering site. Site 305 is located upstream of the Fish Creek Tipple and is monitored in conjunction with alluvial well 008-AU-3. Site 27A is located immediately upstream of the Fish Creek Tipple discharge (a.k.a. CDPS discharge site 62). Site 1003 is located downstream of the Fish Creek Tipple site 62. Monitoring requirements at sites 307 and 305 require monthly water level measurements (March through September), and semi-annual field parameters. However, per PR03-06, site 305 now requires semi-annual water quality testing. Three relatively new surface sites were added in conjunction with the new Fish Creek Alluvium well sites (AVF- 13, AVF-14, and AVF-15), in order to evaluate potential subsidence impacts in the area. These are surface sites SW-13, SW-14 (both added in August 2001), and SW-15 (added in June 2002). These sites require quarterly water level measurements (March through September), and semi-annual field parameters and water quality sampling. Tables 37 through 45 provide summaries of the 2010 Water Year data collected at Fish Creek surface flow sites. Tables 37a through 45a provide some historical summaries of collected data at each site for comparison. Figures 60 through 91 provide graphical representations of water levels and selected water quality parameters recorded at each site. Again, typical flow patterns were exhibited at these sites with spring runoff periods accounting for the 11