2012-03-07_HYDROLOGY - C1981033 - Laserfiche WebLink

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SURFACE WATER MONITORING There are four (4) active surface monitoring points within Bear Coal's permitted area. Outfall 001, Outfall 002, Upstream North Fork (U /S NFG), Downstream North Fork (D /S NFG). No monitoring is currently required at Springs G26A, G -2613, G -26C and CR- 12. Location of Pond 004 and NFG's can be found on map "Figure 11" located in Appendix A. The French Drains were not monitored during the year because they were removed during the 1997 reclamation project. The sediment pond, Outfall 001, did not discharge during the year. The results of groundwater data collected during 2010 and pertinent water quality parameters are found below. North Fork of the Gunnison River The North Fork of the Gunnison River (USGS Station 09132500) is to be monitored during June and December for field parameters and laboratory analysis for conductivity, total dissolved solids, total suspended solids, iron and Manganese. Actual stream flows are obtained from the web (http: // waterdata.usgs.gov /nwis) or by contacting the Department of Water Resources, Colorado River Talk at 303 -831 -7135. Results of the monitoring follows: Field Analysis 6/15/10 Field Analysis 12/08/10 U/S NFG D/S NFG U/S NFG D/S NFG pH — su 8.3 8.2 pH — su 8.6 8.5 Temp °C 12.8 13.0 Temp °C 0.2 0.8 Cond umhos /cm 60 70 Cond umhos /cm 210 320 Flow — cfs 1070 Flow — cfs 53 Laboratory Analysis Laboratory Analysis Cond umhos /cm 116 133 Cond umhos /cm 564 388 TSS - mg /I 35 41 TSS - mg /I 64 44 TDS - mg/I 105 103 TDS - mg /I 512 354 Iron - mg /I 1.15 1.34 Iron - mg /I 0.07 0.07 Iron, Diss, mg /I 0.03 <0.01 Iron, Diss, mg /I 0.01 0.01 Manganese mg /I 0.04 0.04 Manganese mg /I 0.028 0.036 Iron and Manganese are both analyzed for total. In reviewing field as well as laboratory analysis, the Bear No. 3 Mine had no significant deleterious effect on the North Fork of the Gunnison River during the 2010 reporting period. -3-