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Rockcastle Coal Company - 3 - September 13, 1991 6.) As previously discussed, and as contemplated in the Agreement <IV, 3>, the roads leading to these pits must be configured to a relatively maintenance free condition. This will include removal of culverts, to be replaced by riprapped low water crossings, and/or culvert designs which verify safe passage of the projected 10-year, 24-hour peak flows. Also, all existing culverts must be maintained. Pit 4 l.) Please submit the plan to backslope the Pit 4 area above Pond 4. Include pertinent pond designs if the slope reduction activities will result in changes to Pond 4. Include bond calculations including the estimated volume of material, for the work. 2.) Please submit topsoil redistribution depth information for Pit 4 as previously discussed. 3.> Maintain all perimeter ditches and culverts to ensure that all disturbed area drainage is routed to Pond 4. Check previous inspection reports for details. Pending Issues from the October 23, 1991 Letter 1.> Please respond to issue III.I. 2.) Issue IV.1 is changed as follows: a. Hydrologic designs can be based upon the 10-year, 24-hour peak flow, rather than the 100-year, 24-hour peak flow. b. The post mining topography map issue is resolved as discussed above. c. As specified in the Agreement, some bond amount will be retained, at the final increment release, if the Pits 5 and 6 engineering work is not completed. 3.) Please respond to Issue IV. 2. Apparently some of the previously agreed Pit 4 haul road slide mitigation work remains unfinished. Some amount of bond money, designated for the Pit 4 road mitigation work may be retained if all work is not complete. At this time, the Division would like to have a commitment from Rockcastle regarding implementation of the outstanding tasks. Please provide an anticipated schedule for accomplishing work, and a schedule of forthcoming bond release requests, including an estimate of the amount of money to be released for each request. Resolution of these issues will aid in expediting the pending bond release request, and will help to ensure that the site is reclaimed in accordance with the Agreement and the Regulations.