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.- <br /> <br />2 <br />Reclamation of the structures discussed above and installation of <br />the diversion(s) approved in the technical revision should be <br />completed within 20 days of final approval of the revision by the <br />Division. <br />The demonstration that sediment. control ponds are no longer <br />required at the reclaimed mine, on page 4-19, includes a statement <br />that those structures no longer need to maintained. This statement <br />should be removed from the permit. As long as the structures <br />remain on the ground and are capable of impounding water,. they need <br />to be maintained to design specifications. <br />2. Appendix 4-H includes a discussion of subsidence monitoring <br />plans for the mine. Requirements for subsidence monuments were <br />dropped by the Division in its 1988 Findings document because the <br />area proposed to be monitored was never undermined. The permit <br />should be revised to reflect the fact that subsidence monitoring is <br />not presently required. <br />3. Drawing D-2-3 contains drainage structures for the haul road <br />to the former loadout. This map needs to be revised to accurately <br />reflect the current configuration of the road's drainage system. <br />Appendix 4 includes design data for the road culverts. This <br />section should also be updated, if necessary. <br />Two additional items should also be addressed this fall, outside <br />the realm of the revision discussed above. First, the long pond <br />embankment and surrounding area appears to need reseeding, as last <br />year's efforts do not appear to have succeeded. Cattle should be <br />kept off the seeded area for at least one year, as required by Rule <br />4.15.5. This may require installation of a fence around the pond. <br />Secondly, the old monitoring well neat to Pond P-7 needs to be <br />reclaimed, and the concrete pad removed. <br />If you have any questions about theses matters, please feel free to <br />contact me or Barbara Pavlik. Ms. Pavlik will be back in the <br />office on October 17. <br />Sincerely, <br />Larry P. Routten <br />Environmental Protection Specialist <br />cc: Barbara Pavlik <br />Susan McCannon <br />c:\wp51\92794 <br />