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Nk. Mike linulay llivision of Minerals and Geology April 30, 2002 Page 2 If known to exist and/arprzviourly mapped, please add the locations of unconsolidated ru~cial landslide deposits to Exhibit 6-1B and update the permit text according. Ifpotentially unstable and active Iandsdide anar exist, then the revised text should contain a plan to minimise disturbance in these areas. A mitigation plan to ensure the stability of these facilities should be developed and implemented during construction. Response: Exhibit 6-1B,Site Specific Geology, has been updated to show the approximate location of known areas of surficial instability. The text in Tab 6, page 8, has been revised to include reference to the existing areas of surficial instability. One area of minor slumping was associated with southern cut slope of Pond 006 along Haulroad A and is discussed in Attachment 13-4A and B. This area has stabilized and is visually monitored on a regular basis. The another area is located on the north side of the B' Pit, in the azea that was previously shown as the proposed site of Topsoil Stockpile N. This topsoil stockpile was never constructed. However, there was mining conducted below the actual azea of the slide, which probably contributed to the surface movement. This pit azea has been backfilled/reclaimed and should not contribute to further instability. Additional mining is proposed, in 2002, in the general vicinity of this slide but will not disturb within 300 feet of the toe of the actual slide. The proposed mining area has already been shot, so the overburden only needs removed (probably by dozer and scraper), the coal removed, and the pit backfilled/reclaimed. The last azea of surficial slippage was associated with the fmal highwall in the `A' Pit and occurred during angering operations along the highwall. Backfilling and ongoing fmal reclamation activity of the final pit have stabilized this azea. There have been no unstable or active surficial landslide areas identified in the II-~~/ South azea to date, therefore the proposed and approved facilities locations (e.g., topsoil stockpiles and haulroads) should present no concern. 5. In the legend of revised Exhibit 6-1 B, the symbol KW/shauld refer to the Williams Fark Formation. Please revise Exhibit 6-1B aaordin~. Response: The legend on Exhibit 6-1B has been revised accordingly 2.04.10 Veeetation Information and 2.05.4(21(el ReveQetation Plan 6. On page 22, of current Tab 22, there is discussion of concentrated shrub seeding wring Seedmix #6, as an optional method to be used for establishment of shrub islands or groupings. The narrative states that rush seedingr `ivil! primarily be scattered in the two areas illustrated on Exhibit 22-1. " Exhibit 22-1 does not include the South Mining Area disturbance depicted on Exhibit 22-1A. A number of shrub establishment titer are depicted an Exhibit 22-1A, and it it indicated in the map legend that the titer would be eztherplanted with a designated list of speller, or seeded with Seedmix #6. Please amend the text on page 22, to include reference to concentrated shrub seeding within some portion of the shrub planting areas depicted on Exhibit 22-IA, as appropriate. Response: The discussion on page 22 has been revised 7. Further narrative an page 22 states that, "if monitoring indfcates a greater level of rucceu in seeded versus planted areas, the reeding of concentrated shrub areas will become the preferred throb establishment method an upland riles ". Please amend the referenced text to reflect consideration of the resullr of monitoring to date, and to address any resultant changer with respect to the use of concentrated reeding and seedling transplanting methods of shrub establishment.