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• 2.05.6(6) The operator will evaluate each rejuvenated or new landslide to determine what the apparent cause of the modern movement might be. If appropriate, mitigative methods will be proposed to minimize hazard to the mine facilities, public health and safety, and the environment. The visual subsidence monitoring program will continue and survey monitoring will be performed quarterly. The results of the survey monitoring will be studied for abrupt changes in surface levels which might indicate mining impact. . The operator will both survey and visually monitor the effectiveness of the ground control methods implemented during development mining through the fault trace. Any failure of the ground support will be immediately reported to the DMG. The report will include the operator's remedial roof support plan. Ground support failure is defined as a cave of debris of over one mining height within the fault trace. At this time there are no plans to mine under the Terror Ditch, the power line which runs parallel to Terror Creek or to mine under Terror Creek Reservoir. A subsidence monitoring plan will be developed prior to mining, within the angle of draw of the ditch or power line, and within one mile of the reservoir. The mine plan configuration of the B seam workings places bleeder entries for the B-4, 5 and 6 panels under approximately mid-panel on the D-7 panel. This area of multiple seam mining has an increased risk to damage the land surface through increased tensile strains. It is expected that this increased strain will cause surface fractures to form. Since this area of multiple seam mining underlies Sheep Corral Gulch, The Forest Service is concerned that surface fractures may cause interruption of surface flows (when present), damage stock ponds or create large fractures that will need to be mitigated. f~ TR-031 2.05 - 113 - 02/04 /f PPRo QED -S ~~ ~ /e y