GENERAL35216 - Laserfiche WebLink

Home Browse Search

ally that erosion controls will include repair and revegetation of rills and gullies should these develop. Sediment Pond Construction and Removal The applicant has specified that topsoil will be removed as part of the founda- tion preparation for the sediment pond embankments. Furthermore, topsoil will be removed from the impoundment area of each pond. This will occur in the D- Portal Area pond before construction of the Scullion Gulch diversion commences. In the Refuse Disposal Area, this topsoil removal will occur prior to construc- tion of ponds and before disposal of waste materials begins in that area (page IY-41 of the permit application). The Refuse Disposal Area ponds will be removed when the appropriate regulatory agencies have deemed that reclamation of the subareas serviced by those ponds ,.,,,,:~ has been effective (page IV-74 of ~ie permit application). The D-Portal pond will be removed as part of the reclamation of Scullion Gulch, but other sedi- ment controls will be provided to compensate for the removal (See "Stream Chan- nel Diversion" in this section). All disturbed areas will be top soiled, mulch- ed and revegetated at the time of reclamation (page V-32 of the permit applica- tion). Discharge Structures Map 32 of the permit application illustrates the typical erosion controls to be used for ditch and culvert outlets, which appear to be adequate. The applicant must specify, however, that erosion controls will also be utilized at the out- lets of the principal and emergency spillways (See "Stipulations" in this sec- tion of the TEA). Acid-Forming and Toxic-Forming Waste Analysis of the coal, overburden from the portal excavations and surface soils do not indicate the presence of toxic or acid-forming materials. Runoff from the coal waste banks, the disturbed areas or the exteriors of the surface fa- cilities is not expected to have acid-forming or toxic characteristics (page 25