Laserfiche WebLink
2.05.6(6) <br />(f)(v)(B) Monitoring <br />The hydrologic monitoring program will continue. At least quarterly <br />monitoring will be performed. Surface streams, ponds, springs and <br />groundwater will continue to be monitored. The results of the monitoring will <br />be observed for abrupt changes in water levels, flows or quality which might <br />indicate mining impact. <br />The Operator has set up a subsidence network over the first five longwall <br />panels to gain as much information as possible to compare actual data with <br />the subsidence predictions presented in Volume III, Exhibit 15. Additionally, <br />the actual subsidence data will be utilized to check the design and <br />effectiveness of limited extraction zones. <br />The Operator installed five subsidence monuments in the limited extraction <br />zone along Hubbard Creek (monuments 17-A through 17-E). These <br />monuments will be utilized to verify that subsidence does not occur along the <br />• limited extraction zone. The monuments were installed during 2001 prior to <br />the November 2002 longwall start-up in panel D-7. The Operator has <br />installed seven subsidence monuments to to measure settlement over <br />superimposed multi-seam extraction as follows: <br />Panel B-3 B-4 B-7 B-9 B-10 <br />Monuments 11-A 6-A, 14-G 13-H, 1-A 31-A 2-C <br />I• <br />The Operator will monitor the topographic surface, soil and vegetation <br />through interpretation of color areal photographs. The portion of the Iron <br />Point Lease managed by the Forest Service will be photographed during late <br />spring 2001. The area will then be photographed in five year intervals. A set <br />of the photographs will be supplied to the Forest Service and any changes <br />to the topographic surface, soil or vegetation will be noted. Field <br />investigation of changes may be required. Mitigation measures, if required, <br />will be developed jointly between the Operator and the Forest Service. The <br />Operator will cease monitoring the topographic surface, soil and vegetation <br />after the acquisition of a photographic record at least two years after the <br />completion of mining. <br />PR-08 2.05 - 112 - 07/03 <br />/9PPRev~ <br />7/~s~~s <br />