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0 2.05.6(6) <br />developed jointly between the Operator and the USDA -FS. The Operator will <br />cease monitoring the topographic surface, soil and vegetation after the <br />acquisition of a photographic record at least two years after the completion of <br />mining. <br />Immediately following retreat extraction in the immediate proximity of a <br />stream, spring or pond, the intensity of monitoring that feature will be <br />increased to once a month for six months. <br />The Operator will visually inspect known historic and modern landslides <br />within the permit and adjacent area for stability in June and November of <br />each year. Additionally, known historic and modern landslides will be visually <br />inspected once a month for six months immediately following retreat <br />extraction in their immediate proximity. <br />The Operator will evaluate each rejuvenated or new landslide to determine <br />• what the apparent cause of the modern movement might be. If appropriate, <br />mitigation methods will be proposed to minimize hazard to the mine facilities, <br />public health and safety, and the environment. <br />The visual subsidence monitoring program will continue and survey <br />monitoring will be performed quarterly. The results of the survey monitoring <br />will be studied for abrupt changes in surface levels which might indicate <br />mining impact. <br />The Operator will both survey and visually monitor the effectiveness of the <br />ground control methods implemented during development mining through the <br />fault trace. Any failure of the ground support will be immediately reported to <br />the DRMS. The report will include the Operator's remedial roof support plan. <br />Ground support failure is defined as a cave of debris of over one mining <br />height within the fault trace. Mining has been performed through the fault <br />trace with no problems. Therefore no additional monitoring or reporting is <br />required. <br />PR -12 2.05-156- 02/10 <br />A PPROV 6D <br />it /16t10 <br />