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J. J. Dudash - 7 - October 01, 2009 <br />BRL - Ditch GV137 has been added to the "V-Ditch Design" table on page Exh 8- <br />291. <br />22. DRMS - On proposed Figure 3, "Coal Mine Waste Disposal Area-Pond F Detail" <br />please revise the ditch depth and flow depth values for ditches UpDivWestl, <br />UpDivWest2 and UpDivEast to conform to the values obtained in the ditch <br />designs. The ditch depths should be 1.5, 1.4 and 1.6 respectively and the flow <br />depths should be 0.5, 0.4 and 0.6 respectively. <br />BRL - The ditch depth for UpDivWestl should be 1.2 and has been corrected <br />based on SedCAD output, please see page 33. UpDivWest2 and UpDivEast <br />were changed on Figure 3 per DRMS recommendation. <br />23. DRMS - On proposed Figure 3, "Coal Mine Waste Disposal Area-Pond F Detail" <br />in Volume IX, please revise the as-built pond F water volume, sediment volume <br />and total pond volume values to conform to the designed values shown on <br />revised page App. B-4. The revised water volume, sediment volume and total <br />pond volume values are 3.66, 0.18 and 3.84 acre-feet respectively. <br />BRL - Changes to the Pond F required capacity have been changed on Figure 3 <br />per DRMS recommendation. <br />24. DRMS - The design parameters for the required water volume, sediment volume <br />and total volume have changed for pond D as well. Volume IV and Drawing No. <br />95266-04 in Volume IV contain the pond D design parameters but this <br />information was done by Westec. Since the revised required pond capacities are <br />less than and close to the previous values, it does not appear to be worth the <br />effort to ask Westec to revise Volume IV or their pond D drawing. However, in <br />order to avoid any confusion, please add to page 2.05-29 of Volume I a reference <br />to the pond D design information located in Exhibit 8 of Volume III. <br />BRL - Page 2.05-29 has been revised to reflect the current configuration of the <br />pond and associated ditches. <br />25. DRMS - Please replace the silt fence/straw bale designation at the material <br />storage area shown in the plan view drawing on Map 22-C in Volume II. Also, <br />please add in the legend to Map 22-C what the designations are for the silt <br />fence/straw bales and the berm at the material storage area. <br />BRL - The silt fence/straw bale has been added to the material storage area on <br />Map 22-C. Since a legend is not part of Map 22-C, the requested designations <br />are annotated on the map. <br />26. DRMS - Please update the Probable Hydrologic Consequences section of <br />Volume I to account for the increase in storage capacity of gob pile no. 4 from <br />300,000 cubic yards to 450,000 cubic yards. <br />BRL - Enclosed are updated pages 2.05-74 through 76 in the Volume I PHC.