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~~ <br />Section II (continued) <br />Page 2 <br /> <br />The broken sewer line leading from the bench to the drainage ditch below the bench <br />outslope has been temporarily repaired. Permanent repairs must be completed in accordance <br />with the schedule for placement of the 10" corrugated metal pipe from the bench to <br />sediment pond b2, discussed below. <br />The operator is currently in the process of replacing and extending the broken <br />10" PVC drainage pipe Ieading from the mine bench to sediment pond b2 with a 10" corrugated <br />metal pipe. This pipe will extend from the mine bench to the toe of the bench ovtslope and <br />then will be buried and extended to a point near the inlet end of sediment pond b2. <br />This will eliminate the need for the existing drainage channel which has been almost <br />impossible to maintain as designed due to the continual sloughing of rocks and spoil from <br />the unstable mine bench outslope directly above. Anew drainage channel designed to <br />carry runoff from the topsoil stockpile and mine bench outslope itself will be constructed <br />far enough to the west of the toe of the outslope so that it will not be susceptible to <br />getting blocked or filled in. This work must be completed as soon as possible in order to <br />restore proper drainage control from the bench area. <br />The berm forming the crest of the mine bench needs strengthening in one area located <br />approximately 20' south of the inlet end of the 10" PVC drainage pipe near the coal stock- <br />pile. <br />4.I2 Slides and Other Da <br />The dozer cut made at the toe of the bench outslope in order to install the 10" <br />corrugated metal drainage pipe must be backfilled as soon as possible after installing <br />the pipe. Due to the unstable nature of the slope, there is a potential for a significant <br />slide to occur since the toe of the slope has been temporarily removed. <br />The Division has issued Notice of Violation No. 8I-49 for failure to prevent spoil <br />material from being placed on the downslope of the mine bench. This appears to have <br />occurred during efforts to remove boulders and rocks from the new fan pad area currently <br />under construction. All waste materials from the mining operation must be disposed of <br />in a controlled manner and not simply spoiled over the bench embankment. These materials <br />could, and in this instance did, roll into the adjacent undisturbed area. Additionally, <br />the bench embankment is known to be unstable and spoiling material over the side could <br />compound the problem. <br />