_INSPECTION - C1981041 (28) - Laserfiche WebLink

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III. 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. 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 to repair or replace silt fence installations at the following locations: • "B" Substation north side silt fence was ripped along the center stake; needs to be replaced. • 2W Portals upper portal backfill silt fence was undercut at the end near creek channel; needs to be repaired. 2W stockpile area(between reclaimed portals)silt fence had pulled off stakes in a couple • locations, and needs to be re-stapled. All sediment ponds and SAE sumps were dry, with the exception of Pond 1&2, which contained shallow puddles. Some fill material had been placed in Pond 8 at the South Portals area, in association with the pond size reduction approved in Permit Revision 3. Construction of the smaller Pond 8 will be completed in conjunction with the current South Portals area reclamation project. The 016 mine discharge site was flowing at the normal rate(approximately 300 gpm); flow was clear. Drainage and diversion ditches and permanent diversion segments were in most cases in good condition. The problem of recurrent erosion along the"explosives bunker' permanent channel segment was noted in the previous complete inspection. Subsequently,the operator submitted a technical revision design plan for the segment of concern, which has been approved by the Division. The design is to be implemented prior to May 2008. French drain installation in the immediate highwall backfill area was previously completed. The 001 discharge dewatering pipe has not yet been sealed; a hose has been extended out from the buried pipe and water from this source is being used for dust suppression during earthwork operations. This pipe will be plugged with pumped concrete grout in accordance with specifications in recently approved TR-53, as a component of the South Portals reclamation project in progress. The RSRDA diversion segment that had been impacted by rockfall as noted in the previous site inspection had been repaired. The South Portal area drainage system, including various road ditches, culverts, diversion channels, and Sediment Pond 8,was altered by Permit Revision 3 (PR-3) designs. Installation of the PR-3 approved drainage system is in progress, in conjunction with the South Portal area reclamation project currently under way. All disturbed area drainage in the South Portal area continues to be properly routed to Sediment Pond 8. Backfilling and Grading The various backfilled and graded areas were walked, and no excessive erosion, slumping, cracking, or other signs of instability were apparent. Backfilling and grading associated with the South Portals reclamation project is continuing. Concrete demolition was continuing but appeared to be nearing completion in the former wash plant location in the lower facilities area. Soil from the UTL had been stockpiled for spreading over final graded surfaces in the lower facilities area. The soil appears to be a reddish brown sandy loam. Processing Waste Most areas of the CRDA-1 and RSRDA waste disposal sites site were walked, and the reclaimed CRDA-2 was viewed from the top of CRDA-1. There were no indications of instability or excessive erosion. Diversions, perimeter ditches, and terrace drains appeared to be properly maintained and functional. 4