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Adequacy Review 3 August 28, 1998 Amendment Application AM-01 Tozer Pit Permit No. M-78-107 Permanent Man-Made Structures: The pre-existing access road, referenced above under "Roads", is a permanent man-made structure. Pursuant to Rule 6.4.19, please ensure that the pre-existing access road is listed under Exhibit S. Additionally, please provide a notarized damage compensation agreement OR appropriate engineering evaluation for the pre-existing access road, as required by Rule 6.4.191a) and (b). Exhibit S of the application, lists County Road G and Empire Electric power line, as permanent man-made structures located within 200' of affected lands. Please provide a notarized damage compensation agreement OR appropriate engineering evaluation, for all structures located within 200' of affected lands, as required by Rule 6.4.19(a) and Ib). Hydrologic Balance: The soils information, submitted within the application, indicate severe water erosion potential. NRCS letter, dated 5/22/98, indicates potential for intermittent flooding, especially in Phase VII. The application indicates that affected area drainage will be controlled with sediment containment berms and treated for sediment, prior to leaving the permit area, with straw bale filters and sediment ponds. Details of the sediment containment berms, provided on the Reclamation Plan Map, indicate a bottom width of 2' and height of 3'. Such details indicate a berm outslope of 0.33H:1 V (300%). DMG cannot approve such designs in the absence of an engineering demonstration indicating that the such berms will remain stable. Please provide an engineering demonstration showing stable 300% slopes, OR correct the apparent error in the indicated berm design. DMG recommends a maximum slope of 3H:1 V for earthen berms, stabilized with riprap or vegetative cover. The Mine and Reclamation Plans and Maps indicate that three sediment ponds will be constructed. However, description of the ponds construction, size, capacity and discharge structures are absent. Given the severe erosion potential of the soils and potential for intermittent flooding, please provide construction details for the proposed ponds, which demonstrate compliance with Rule 3.1.6. Reclamation Plan: Exhibit E--Reclamation Plan, indicates that topsoil and overburden will be salvaged for reclamation purposes, but not segregated as required by Rule 3.1.9(1). Please correct the wording of the Reclamation Plan to indicate compliance with the conditions of Rule 3.1.911). Additionally, the application does not commit to a replacement depth of topsoil, as indicated by Rules 6.4.511) and (2)(f)(v). Please include a minimum depth or range of depths for topsoil replacement. Exhibit E also indicates that revegetation efforts will occur in accordance with NRCS recommendations and suggests that additional fortis and shrub seeds will be added, beyond the NRCS recommended seed mix. Pursuant to Rules 6.4.512)(d) and If)(iv), please list all species to be planted and seed rates. Please include a nitrogen fixing legume seed in the seed mix, as indicated by Rule 3.1.1011) and 14) and 6.4.512)(d).