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OURAY SILL-ER AA E5 <br /> e. Section 3.5 "Backfill Ponds and Collection Ditches" indicates that the Sediment Pond#1 will <br /> remain as a post-reclamation feature and will be graded to blend in with surrounding contours <br /> during general regrading of the site. Please clam the estimated amount of material in Cubic <br /> Yards to be moved to achieve the blending portion of the reclamation of Sediment Pond#1. If <br /> any material will be required from a different area to achieve the final reclamation <br /> configuration,please indicate the volume and source of that material. <br /> Similarly,please indicate which collection ditches on site will be backfilled and graded as well <br /> as the associated amount of material in Cubic Yards to be moved to backfill the ditches. If any <br /> material will be required from a different area to achieve the final reclamation configuration, <br /> please indicate the volume and source of that material. <br /> OSMI Response: No material will be moved or added to the Sediment Pond#1 to achieve <br /> reclamation grades as blending is not necessary. The collection ditches will remain as post- <br /> reclamation features for stormwater control.No additional material will be placed as backfill. <br /> f. In addition to Item S of this review,please clam the existence of the half-culvert structures <br /> located on site. File review of AM-01 indicate a half-culvert design was used for collection <br /> ditches, however there is no discussion of the half-culverts in the narrative of this revision. <br /> OSMI Response: Some of the half culverts will be removed with the construction of the new <br /> treatment system in 2020. Remaining half culverts will be removed and disposed of as scrap <br /> metal as part of final reclamation. <br /> g. Section 12 "Governor Basin"of the reclamation plan is inferred to be in reference to the <br /> reclamation of the Permit Area surrounding the Monongahela Vent Raise and Secondary <br /> Escapeway. It is stated that the Governor Basin structure will be removed as part of the <br /> reclamation of that area. Please provide a more detailed narrative discussing the demolition and <br /> removal of all associated structures, reclamation measures to seal the shaft, any backfilling and <br /> grading required as well as provide a list of equipment required to complete the reclamation. It <br /> is also stated that because the waste rock piles that surround this structure are part of joint US <br /> Forest Service/OSMI non-time critical cleanup project. Please provide more details on how the <br /> cleanup project relates to the mining related disturbances within the Permit Area. In addition to <br /> the narrative please submit an accompanying Reclamation Plan Map of the associated area <br /> showing the final configuration of the reclaimed area. <br /> OSMI Response: See response to Item C. The proposed shaft location in Governor Basin is <br /> located on a previously disturbed area and is comprised primarily of waste rock material from <br /> historic operations. The reclamation of this area will include demolishing the surface structures <br /> (i.e.,headframe and building) and placing them down the shaft and capping as described in the <br /> Reclamation Plan. Waste rock and other native materials removed during construction will be <br /> placed over the top of the cap and blended with the surrounding landscape. <br /> 7 1 P a g e <br />