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TABLE 3.3: EXISTING MINEOFFICE/STAGING AREA BWLD|NGS <br /> Used Oils Tank 1,000-1 ik 4.0 x 11.5 Cinder blocks <br /> Flammable Cabinet Metal storage cabinet 4.0 x 10.5 Railroad ties <br /> Clear Diesel Tank 4,000-gallon tank Steel I-beams <br /> Dyed Diesel Tank 10,000-gallon tank 11.0 x 30.0 Steel I-be-ams <br /> Main Breaker Box Electrical panel box 4.5 x <br /> 11.0 Steel 1-beams <br /> Parts Storage 1 Woodshed 13.0 x 33.0 Cinder blocks <br /> Parts Storage 1 (Outer) Reinforced concrete pad 11.0 X 15.5 6-inch thick reinforced concrete <br /> Maintenance Shop Metal frame building with 42.0 x 44.0 6-inch thick reinforced concrete, <br /> tarp cover (I 2-inch rebar grid) <br /> Parts Storage 2 Tractor trailer 9.0 x 42.0 Trailer with tires <br /> Parts Storage 3 Woodshed 11.5 x 13.0 Wood floor <br /> Mine Office Single-wide"railer 14.5 x 56.5 Cinder blocks <br /> Propane Tank 200-gallon capacity 4.0 x 8.5 Cinder blocks <br /> Block Heater Breaker Electrical panel box witl 4.5 x 7.5 6-inch thick reinforced concrete <br /> Box wood frarne cover (wire reinforcement) <br /> 3,10 Post-Closure Management <br /> Post-closure activities would consist primarily ofmonitoring and inspecting reclaimed ana@S, with <br /> minor maintenance asnecessary. <br /> Reclaimed slopes would be inspected for signs ofgootechnica| instability(bulging at toe, cracks <br /> at onaSt, a\Dughing, etc.) annually for o period of years after reclamation grading is complete. If <br /> necessary, slopes would be regraded to eliminate any ponding or potential impacts from surface <br /> water or regraded to shallower slopes. Regraded slopes would be nevegehated. <br /> Reclaimed slopes Would be monitored for revegetation success, for a minimurn of 3 years afterthe <br /> last revegetation efforts. If necessary,slopes would be revegetated and monitored for an additional <br /> 3 years for revoget8Uonsuccess. <br /> Re-established drainage channels (where culverts were removed) would be inspected for signs <br /> of erosional instability (material washing out, erosion gu|iiea, exposed rocks without fine matrix, <br /> etc.). Inspections would be performed annually and after heavy rainfall events (greater than <br /> 1.5 inches in 24 hours, corresponding to the 10-year, 24-hour event) for a period of 5 years after <br /> reclamation grading is complete. |f necessary, additional erosion protection such as rook vortex <br /> vve|[a, riprap, or riprGp splash pads or aprons would he installed if inspections showed signs of <br /> excessive erosion in the re-established drainage channels. <br /> 34 <br />