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July 29, 2020 C-1981-035/King Coal Mine JHB <br />Ditches and ponds at both King I and King II facilities handled the runoff without any short circuiting, breaches, <br />or clogging. <br />The North Clearwater ditch at King I had shotcrete application in early June. The armored portion of the ditch <br />handled the recent precipitation well, with no undercutting or side cutting at the contact points where the shotcrete <br />intersects with the ground. <br />The "contaminated water intercept ditch" on the south side of the refuse pile at King I held up adequately. There <br />was some down -cutting at the refuse/ground interface, but not excessive. All runoff from this ditch was contained <br />in the sediment control system and subsequently the sediment ponds. Grading of the west side of the upper <br />portion of the refuse pile needs to direct runoff to the southern intercept ditch. Currently, due to the location of the <br />haul road, runoff funnels down the southwest face of the pile. This runoff is captured in a ditch and berm at the <br />base of the slope and routed into the rock -lined portion of the sediment control ditch. GCC will need to grade this <br />portion of the pile to reduce the rills and gully formation, and to direct the runoff away from the face of the pile. <br />The west clearwater diversion ditch at King I held up well with no apparent rip rap movement in the ditch. No <br />breaches or short circuiting was observed along this western ditch. <br />The West pond at King I was holding a cloudy pool of water well below the discharge to the east pond elevation. <br />Some additional sediment has deposited in the southern portion of the pond since the June 2020 inspection, but <br />visually, the pond storage appears adequate. The East pond was holding a small pool of water, well below the <br />discharge riser. <br />The Sediment traps along the entrance road at King I, at SAE #1 were holding up well. Once these sediment traps <br />dry, GCC should evaluate to determine if sediment needs cleaning out. <br />King Ih• The West Clearwater Ditch Reaches IA, 1B, and 1 C were holding up well. No obvious sediment <br />deposition was noted in this ditch, The silt fencing on the north side of the haul road as part of the gravel storage <br />SAE has several loose fabric sections that require repair. The fabric is functional through most of the silt fencing, <br />but requires reinforcement in several isolated spots. <br />The King 11 sediment pond was holding a shallow pool of water. Vegetation on the inslopes and embankments of <br />this pond are satisfactory. Several Musk thistle plants were encountered on the embankment. Control of this <br />noxious species should be a part of the normal weed control efforts. <br />The majority of the culverts at the King 11 facilities were clear of sediment and free flowing. The outlet of Culvert <br />C 15 (under the ramp to the King II portal bench) requires clean out. Water is still flowing through, but capacity is <br />diminished. GCC needs to re-establish dimensions of ditch ID3 on the north side of the ramp to the King II <br />portals. Sediment has deposited in the ditch, but runoff remains routed through the ditch and not flowing over the <br />roadway. The culvert outlet of C16 (under the concrete pad) requires clean out as well. These are considered <br />normal maintenance items after large storm events. <br />Number of Partial Inspection this Fiscal Year: 0 <br />Number of Complete Inspections this Fiscal Year: l <br />Page 3 of 9 <br />