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October 18, 2012 C-1996-083/13owie No. 2 Mine SLB <br /> should also be placed on the upstream side on the west end as well. <br /> Stormwater control measures were observed at five gob vent borehole locations,in various stages from new <br /> development through reclamation. <br /> Gob Vent Borehole GVB-B2-A, a reclaimed site,was inspected. Sediment control at the site relies on vegetative <br /> cover,which appeared adequate to control erosion. <br /> Silt fence and slash were in place to control erosion and siltation at GVB-B 1 OB,but the silt fence needed to be <br /> maintained. Sediment had reached the top of the fabric in the center of the fence,and would not likely be effective <br /> if runoff were to occur. The operator indicated that this site was slated for reclamation in the near future, since <br /> methane was no longer being pumped at this site (the hole was passively venting). If the pad is not reclaimed by <br /> mid-November,the silt fence will need to be augmented. <br /> Silt fence,berms, and vegetative filters were utilized to treat stormwater at GVB-B 12C, an active borehole <br /> equipped with a methane pump that was operating during the inspection. The silt fence was correctly installed <br /> with the exception of end overlaps (gaps were observed at the top edge of the fence -would recommend increasing <br /> the overlap distance on future installations),and no accumulation of sediment was observed along the fence. A <br /> vegetative filter existed between the disturbed area and the silt fence, and a berm was in place along the disturbed <br /> area edge. No evidence of erosion or siltation was observed beyond the disturbance boundary. <br /> The pad area and mud pit had been prepped for drilling of GVB-B 13D. Straw wattles were in place to treat <br /> stormwater on this pad. The wattles in this area needed to be staked in with overlapping edges,but there was no <br /> evidence of any erosion or siltation beyond the disturbed area. <br /> GVB-B I OA was reclaimed in July of this year. The site was in excellent condition. Stormwater on this site was <br /> controlled with a combination of straw mat and straw wattles. The operator had placed straw matting over the <br /> entire disturbed area, leaving the ends of the mats unrolled on the downhill side of the disturbed area. This <br /> appeared to be effective with one minor exception at a low area on the west end of the pad where no rolled ends <br /> remained. The operator should place straw wattles in this location to ensure that sediment is retained within the <br /> disturbed area. Seeded species had germinated on the well pad and the revegetation will also help to control <br /> erosion. <br /> Stormwater control at the Terror Creek Vent Shaft relies on a combination of a berm, seeding, silt fence, straw <br /> bales, rock filter, and erosion control matting. The outslopes of the shaft are covered with erosion control matting, <br /> and the pad area is surrounded by a berm directing runoff through a silt fence, straw bales, and rock filter. No <br /> evidence of erosion or siltation was observed beyond the disturbed area. <br /> Ditch D-1332, on the southeast edge of the coal stockpile pad was in need of maintenance. The approved design <br /> calls for a rip rap lined channel with a 12"Dso. <br /> All of the approved CDPS outfalls were inspected;none were discharging. <br /> Number of Partial Inspection this Fiscal Year: 4 <br /> Number of Complete Inspections this Fiscal Year: 1 <br /> Page 3 of 8 <br />