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2.06.8 Alluvial Valley Floors • <br />C 1. Peabody Coal Company should update and amend the Fish Creek <br />Alluvial Valley Floor discussion in the permit application. The <br />revised text should include a discussion concerning the elevated <br />concentrations of dissolved solids measured at Site S',d-S2-6, and <br />how these elevated concentrations affect the downstream alluvial <br />system. <br />RESPONSE: <br />Information regarding the identification of Alluvial Valley Floors <br />(AVF) in the vicinity of the Seneca II Hine was provided in Appendix <br />7-7 of Tab 7, Hydrology, of the original permit application. Based on <br />this information, Grassy and Little Grassy Creeks and the two unnan+ed <br />tributaries to Fish Creek (Cow Camp and Bond Creeks) have not been <br />identified as AVFs. Consequently, no additional information needs to <br />be provided in this section. However, a discussion concerning the <br />elevated concentrations of dissolved solids at site SW-S~-6 and how <br />these elevated concentrations affect the downstream alluvial system is <br />provided in the newly revised Probable Hydrologic Consequences <br />section. See Response to Comment 1. <br /> <br />L <br />u <br />• <br />10 Revised 8/27/86 <br />