_INSPECTION - C1981041 (38) - Laserfiche WebLink

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r Ill. COMMENTS - COMPLIANCE Below are comments on the inspection. The comments include discussion of observations made during the inspection. Comments also describe any enforcement actions taken during the inspection and the facts or evidence supporting the enforcement action. The light use road segment above the RSRDA soil borrow area was reclaimed (graded, seeded and mulched) in August. The lower segment of this light use road (between the soil borrow area and the top of the RSRDA disposal area)was graded and roughened in August/September, and was seeded and straw mulched in November, with the exception of the lower-most segment, which was seeded and hydro-mulched in February. Much of the straw mulch had blown off a segment of the reclaimed road that was seeded in November; portions of the segment exhibit steep south facing slopes and relatively fine textured soils. Mulch needs to be re-applied in these areas. If straw mulch is used, it will need to be properly crimped or tackified. Hydrologic Balance Drainage and sediment control structures were in general properly maintained and functional. Silt fencing and berms at the various small area exemption sites were for the most part intact and functional, however maintenance is necessary at the following locations: • At the 016 drill site location SAE, orientation of the silt fence appears to have resulted in some flow being routed along the base of the silt fence, and possibly skirting around the end. The fence needs to be reset(possibly using an additional overlapping segment at the lower end),so that the low point along the end point of the fence is elevated on the slope, and all runoff is forced to filter through the fence fabric. • At the North Portal reclaimed Area, the lower perimeter containment berm is worn down and needs to be built up along a segment beginning approximately 75 feet south of the upper diversion culvert down drain inlet, in the general location where settling features were repaired last year. Construction and riprap installation of the previously approved Powder Magazine Ephemeral Channel has been largely completed and the channel appears to conform with the approved design. The new channel should eliminate the need for frequent maintenance that has historically been required along the segment. It was noted that large diameter riprap had been installed along the short steep segment just up from the old concrete structure, as appropriate. However, the fabric liner was exposed within gaps between the large rocks; the gaps along this segment need to be filled in with smaller rock and cobble material. The disturbance corridor along the entire length of the reconstructed ditch has been properly roughened, but still needs to be seeded and mulched. All sediment ponds and SAE sumps were dry, or nearly so, and appeared to be properly maintained and functional. Construction of the new, reduced capacity, Pond 8 at the South Portal Area has been completed and the P.E. construction certification was on file. The pond contained a small puddle near the southeast inlet, due to drainage of 5gpm or so down the RSRDA North Collection Ditch, originating from the South Portals French Drain and the sealed South Portal discharge pipe (which was leaking approximately 1-2 gpm). Pond 1&2 at the UTL contained shallow puddles. At the South Portals Area, there appeared to be some minor discrepancies between the approved South Portals Area drainage control plan and the on-site conditions, with respect to certain culvert locations, installation of a buried PVC pipe to drain a portion of the upper bench into the Access Road 1A ditch, and alignment of the lower segment of the French Drain. These minor modifications will need to be addressed within a Technical Revision application, incorporating and demonstrating compliance of the"as built" drainage structures and configuration, to be submitted by May 1, 2008. 4