_GENERAL DOCUMENTS - C1981017 (216)

Home Browse Search

i -3- It is stated in the application that an additional NPDES discharge permit (020) has been applied for. Is this discharge point for the discharge from the present slurry pond following conversion to a combination slurry/sediment pond? If not, an application must be made for this discharge point unless Mid-Continent proposes to route this water through discharge point 001 . In this case, the Division will require enlargement of the pond system at discharge point 001 since recent experiences have shown that this pond system is barely adequate. 8. Sheet 3 of 7 of the Geo-Hydro report shows that drainage from the proposed fill will enter the drainage area controlled by the pond system at discharge point 001 . The appropriate design changes in this pond system must be submitted, since recent experiences have shown that this system is barely adequate to control runoff from the present drainage area. 9. The minor revision request concerning the conveyor tunnel face-up showed a topsoil stockpile near the picnic area. This stockpile is not shown on any map included in this submittal . If this topsoil stockpile is to be used, it must be shown on a map and the estimated storage quantity discussed. Also, all existing and proposed topsoil stockpiles in the general area must be shown on a map. 10. Mid-Continent has requested a small area exemption for the conveyor system from the tunnel to Transfer 1 . The Division is willing to grant a small area exemption if no coal is either spilled from the belt or dropped from the underside of the belt. If coal is subsequently found to drop from the belt, the Division may require cessation of use of the belt until proper sediment control is installed. 11. The soils report, completed by Dan Champion, states that an average of 25 inches of topsoil is available along the conveyor corridor and stockpile areas. Mid-Continent must either commit to salvage according to this recommendation or state how much topsoil is proposed to be salvaged. 12. The topsoil stockpile shown on sheet 3 of 7 of the Geo-Hydro report is not contained within the sediment control system. How does Mid-Continent propose to control drainage from this stockpile and any other stockpile that may be outside the sediment control system. 13. It is stated in the application that cross drains will be placed every 500 feet or in natural drainages along the conveyor corridor. The locations of these culverts, culvert sizes, and supporting calculations must be submitted. 14. The pad drainage area shown in the Geo-Hydro report does not correspond to the disturbed area shown on sheet 3 of 7. The major discrepancy is at the location of the cut. The cut is shown on sheet 3 of 7 going to an elevation of 8415, while the drainage area is shown to only go to approximately elevation 8375. This discrepancey must be explained and any appropriate changes made.