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The existing drainage control plan was slightly modified to control drainage from the expanded coal stockpile, as <br />shown on Map 24. The modifications included rerouting Ditch D -2 so that it carries runoff and mine water around <br />• the southern side of the coal stockpile area. The ditch, as shown on Map 24, drains into Pond D. Two culverts <br />were placed in the Ditch D -2 at the locations shown on Map 24. A new ditch, which has been labeled Ditch E -2, <br />was added to drain the water from the northern part of the stockpile into Pond E. This does not increase the <br />drainage area tributary to Pond E,' therefore, Pond E does not require resizing. Two culverts were placed in this <br />ditch to pass water under an access point into the stockpile and under the haulroad. Design information for the ditch <br />and culverts is contained in Exhibit 8. <br />Where a segment of Ditch D -4 crosses the south edge of the ROM /Low Quality Coal Stockpile area, a 22 -inch <br />polyethylene pipe had been installed to maintain ditch drainage through this area, and allow the coal stockpile to be <br />expanded, as needed. Problems with keeping this pipeline open and changes in stockpile management associated <br />with the new Washplant resulted in removal of the pipeline and reestablishment of the affected segment of Ditch D- <br />4. The reestablished ditch section was constructed consistent with the original ditch design. While it is TCC's <br />intent to retain and maintain this s, segment of Ditch D -4, we would like to reserve the option of replacing the <br />previously approved culvert installation (22 -inch polyethylene pipe) with 24 -inch or larger CMP culvert, if needed <br />to facilitate stockpile management and associated equipment operations. Design information for the ditch and <br />culverts is contained in Exhibit 8. <br />The ROM Coal Stockpile area will be reclaimed when no longer required for processing run of mine coal. Above - <br />grade structures will demolished and disposed of in the portal area, and the area will be regraded, topsoiled, and <br />revegetated with the appropriate seed mixture. <br />is <br />• <br />MR09 -238 2.05 -25 06/26/09 <br />