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J. J. Dudash -2- December 26, 2006 with Pond F have sideslopes other than 1.5H:1V. These ditches are F1, F2, F3, F5 through F8, F10, F12, F17 and F18. Please revise Figure 3 to list all of the sideslopes for the "V" ditches. BRL: See Figure 3; operator added a table detailing the sideslopes for the ditches listed above. 6. DRMS: Figure 3 shows a typical trapezoidal ditch detail cross section with a bottom channel width of 3 feet. However, the hydrology design for the east diversion ditch on page App. B-19 shows a bottom channel width of 2 feet. Please revise Figure 3 accordingly. BRL: Operator added statement on the trapezoidal channel detail stating the bottom width for the East Diversion Ditch is equal to 2.0'. Please see revised Figure 3. 7. DRMS: In the table of ditch minimum depth requirements on Figure 3, please change the flow depth from 1.1 feet to 0.4 feet for the east diversion ditch (UpDivEast), as shown on page App. B- 19. BRL: Changed flow depth from 1.1 feet to 0.4 feet on Figure 3. 8. DRMS: In the hydrology design for Pond F, was there an assumption made that a portion of the coal waste on gob pile no. 2 has been covered with soil material? If so, how many acres were involved and have these acres of coal refuse actually been covered? BRL: The assumption was made that the first two benches have been covered for a total 14.9 acres, as shown on page App. A. At the time of this writing, the two benches have been substantially covered. 9. DRMS: Map 18, "Postmining Topography", does not show an upland diversion ditch above gob pile no. 1 and above the gob pile no. 2 extension proposed in TR-44. Please provide a revised Map 18 and appropriate hydrology ditch designs for the upland diversion ditch for the reclamation phase. BRL: See updated Map 18 which shows the location of the upland diversion ditches. The design of the upland diversion ditches during operation and postmining are the same. 10. DRMS: Map 18, "Postmining Topography", does not show any terrace or lateral ditches on the reclaimed gob pile no. 1 and the gob pile no. 2 extension proposed in TR-44. Please provide a revised Map 18 and appropriate hydrology ditch designs for these ditches for the reclamation phase. BRL: To eliminate confusion between the 'Terrace' Ditches and 'Bench' ditches shown on Map 18, the Terrace Ditches which are part of the footprint of Portal B excess material storage area were changed to cyan and text was added to the cross section referencing the location of the ditches. Bench ditches for gob pile No.2 expansion, and gob pile No. 1 were added to Map 18. The design of the bench ditches during operation and postmining are the same. However, the hydrology design of the bench ditches may be changed after the piles are covered with soil and topsoil.