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2.04.7 Hydrology Description <br />but the UDSA -FS did not want the Hubbard Creek road re- opened. Opening <br />the Hubbard Creek road would be problematic because of public opposition, <br />road slope instability and potential flooding. <br />It is highly unlikely the public will use the deep bedrock groundwater located <br />northeast of the Bowie No. 2 Mine east mine workings (east of Terror Creek). <br />It is simply too expensive to install a domestic or livestock well at such <br />extreme depths. The poor water quality would also discourage public use. <br />The lack of deep bedrock groundwater monitoring data is somewhat <br />mitigated by the highly unlikely public use of the water. <br />Based on the above discussion, the Operator was granted relief from the <br />installation of a down gradient monitoring well for the northeastern mining <br />districts contemplated by PR -10, PR -11, and TR -65. <br />The western mining district, west of Terror Creek, has a down gradient <br />monitoring well located immediately west of Terror Creek (TC- 03- 01(B)) <br />which monitors the B -Seam. For the period of record from September 2003 <br />through June 2010, the average conductivity was 6,027 umhos /cm with a <br />range of 4,580 to 7,400 umhos /cm, the average ph was 11.8 with a range of <br />9.2 to 13.1, average total iron was 2.1 mg /I with a range of 0.05 to 21.5 mg /I <br />and average total manganese was 0.0593 mg /I with a range of below <br />detectable limits to 0.403 mg /I. Monitoring of TC- 03- 01(R), which monitors <br />the Rollins Sandstone has been discontinued based on the demonstration <br />that the Rollins Sandstone will not be impacted by mining in the west <br />expansion area west of Terror Creek (see pages 2.05 -115 and 116). This <br />well will remain open for future sampling at the time of bond release if <br />necessary. <br />The western mining district, west of Terror Creek has a down gradient <br />monitoring well located immediately west of Terror Creek (TC- 03 -02) which <br />monitors the sandstone above the B -Seam. Although this well is located up <br />gradient of the Terror Creek Mains, it is primarily down gradient from the <br />west mining expansion area. For the period of record from September 2003 <br />through June 2010, the average conductivity was 1,678 umhos /cm with a <br />range of 170 to 7,100 umhos /cm, the average ph was 9.7 with a range of 7.6 <br />to 13.0, average total iron was 2.5 mg /I with a range of 0.35 to 10.7 mg /I and <br />average total manganese was 0.127 mg /I with a range of below detectable <br />limits to 0.37 mg /I. <br />The western mining district, west of Terror Creek, had a down gradient <br />monitoring well located immediately east of Terror Creek (TC- 03 -03) which <br />monitored the sandstone above the B -Seam. Although this well is located up <br />gradient of the Terror Creek Mains, it is primarily down gradient from the <br />west mining expansion area. For the period of record from September 2003 <br />through June 2006, the average conductivity was 2,559 umhos /cm with a <br />PR -13 2.04-32- 02/13 <br />