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August 29, 2017 C-1996-083/Bowie No. 2 Mine CCW <br /> <br /> <br />Number of Partial Inspection this Fiscal Year: 3 <br />Number of Complete Inspections this Fiscal Year: 0 <br /> <br /> Page 2 of 7 <br /> <br /> <br />Inspection Topic Summary <br />NOTE: Y=Inspected N=Not Inspected R=Comments Noted V=Violation Issued NA=Not Applicable <br />N - Air Resource Protection <br />N - Availability of Records <br />Y - Backfill & Grading <br />N - Excess Spoil and Dev. Waste <br />N - Explosives <br />N - Fish & Wildlife <br />Y - Hydrologic Balance <br />Y - Gen. Compliance With Mine Plan <br />N - Other <br />R - Processing Waste <br /> <br />N - Roads <br />Y - Reclamation Success <br />N - Revegetation <br />N - Subsidence <br />N - Slides and Other Damage <br />N - Support Facilities On-site <br />N - Signs and Markers <br />N - Support Facilities Not On-site <br />N - Special Categories Of Mining <br />N - Topsoil <br /> <br /> <br />COMMENTS <br /> <br />This was an aerial inspection of the Bowie No. 2 Mine, conducted on August 29, 2017. The inspection was <br />completed by Harry Ranney of the Division of Reclamation, Mining and Safety (the Division). The temperature <br />was 94 degrees farenheight and the ground condit ions appeared to be dry. The aerial inspection focused on the <br />coal mine waste piles (Gob piles). <br />PROCESSING WASTE/COAL MINE WASTE PILES – Rule 4.10 and 4.11 <br />Drainage Control; Surface Stabilization; Placement: <br /> Gob Piles 1, 2 and 4 are to the north of Old Highway 133. Gob Pile 3 is located to the south of Old <br />Highway 133. Gob Pile 1 is the furthest west of the three piles to the north of the old highway. Pile 1 has been <br />revegetated for several years. The photos indicate that there were no erosional feat ures on pile 1 (Photo 1). The <br />pile is well vegetated and stable. The drainage ditches on the pile collect runoff from precipitation events and <br />transport it to Pond D. There were no obstructions in the ditches. Gob Piles 2 and 4 were keyed together to create <br />one pile. I n 2016, subsoil was placed on the majority of pile 4 and about half of pile 2. There was above average <br />precipitation in the late winter and spring that caused a minor erosional slide to occur in the subsoil. The erosion <br />created gullies that w ent down the face of the pile and bisected some of the diversion ditches. Repairs to the pile <br />were completed in the early summer of 2017. Since the repairs have been completed, volunteer vegetative growth <br />has covered much of the subsoil on the face of the pile. The volunteer vegetation has helped stabilize the material <br />and prevent runoff from creating erosional features. The photos indicate that there were no major erosional <br />features on the face of Gob Pile 2/4 (Photo 2 and 3). Photo 3 shows that there are minor rills forming on the <br />face of pile 2 in the uncovered gob material. Please monitor this area to ensure that the erosion does not <br />become significant . The drainage ditches on pile 2/4 were clear of debris and capable of functioning as designed. <br />There was not any water in the ditches during the inspection. The clear water diversion ditch that starts above the <br />northeast portion of the pile was in good repair. There were no obstructions in the ditch . Recent pond cleanings <br />have been spread and compacted on the top of Gob Pile 2. The aerial photos show that there was work being <br />conducted on Gob Pile 3 (Photo 4). Material in the west drying area had been excavated and the area was being <br />filled back in and compacted. Gob Pile 3 was stable. There was a large set of rills forming on the southeast <br />corner of the pile (Outlined in the red circle in Photo 5). The rills appear to be coming from a breach in the