2019-03-27_INSPECTION - C1996083

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March 20, 2019 C-1996-083/Bowie No. 2 Mine JHB Number of Partial Inspection this Fiscal Year: 6 Number of Complete Inspections this Fiscal Year: 3 Page 3 of 9 The Gob pile No. 2 east permanent ditch D-F4, continues to down cut. We discussed potential fixes. If rock armoring is the direction BRL decides to go, a revision will be needed. PROCESSING WASTE/COAL MINE WASTE PILES – Rule 4.10 and 4.11 Drainage Control; Surface Stabilization; Placement: All gob piles are currently inactive due to wet conditions and no new refuse material being produced or requiring placement. BRL is preparing to continue to work Gob pile No 3. TR118 is currently under review by the division . A small slump occurred on the south face of Gob pile No. 3 due to the heavy snowpack this year. All material that slumped are contained within the drainage system. None of the material left the approved footprint. Gob pile No. 2 has been left alone over the winter months. This lack of activity on the pile while wet has aided sediment to remain on the pile and not flushing into Pond F. While on Gob pile 2 we discussed improved drainage management of Ditch D-F1 and D-F8. Basil would prefer to direct the drainage to the east side of the pile at the interface with the native hillslope. This approach is preferred by the Division as well. This approach should eliminate the need for the “smart ditch” structure and rock armoring of Ditch D-F-8. If armoring or structures are needed at the eastern extent of gob pile/hillslope interface, then a technical revision would be warranted. ROADS – Rule 4.03 Drainage 4.03.1(4)/4.03.2(4), Surfacing and Maintenance4.03.1(5) and (6)/4.03.2(5) and (6): The roads that have been cleared of snow were damp but not muddy and traversable. BRL has chosen not to plow roads that winter access is not needed. This helps keep the roads from eroding during snowmelt and spring rains. Leaving the snowpack on the unused roads is a good management practice. BRL is watching the mine access road carefully for slumping as the area thaws. Of concern is the road section north of portal B. A small slump has formed on the slope below the road (south of the road). BRL has directed moisture away from this slope in attempts to dry out this slope. SLIDES and DAMAGE - Rule 4.12: A new slump has been observed on the slope above (north) of Portal B. This is an area that a French drain under the access road outlets. BRL has placed pipe into the outlet of the French drain to direct moisture off this slope. The slump arc is approximately 20 feet wide, and has dropped approximately 3-4 feet. The Portal structure is well protected and the slump has not impacted the portal. The slope to the northwest of the B portal has previously shown mass movement, and BRL is directing runoff away from this slope as well. The run-off still reports to the same pond, Pond B. BRL continues to monitor this slope for movement.