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A treated product line discharges from the EC water tank to the first settling pond, with the treated water routing <br />through the baffled 3 -cell treatment ponds to assure adequate retention time to allow settlement of the agglomerated <br />solids prior to discharge. In order to handle both normal discharge and any potential overflow from the treatment <br />settling ponds, a 200 -foot 12 -inch PVC pipe is attached to the discharge culvert from the third and final treatment <br />pond. From the third treatment pond, treated mine water can be transferred to either the Fish Creek/Barricade <br />Chamber or the new Fish Creek/Area 1 Pit transfer pipelines, or can be discharged to Fish Creek at Outfall 115 <br />(subject to emergency discharge provisions or seasonal limitations). Installation of remote monitoring equipment at <br />sites upstream and downstream of the Borehole discharge point, and at the effluent of the treatment pond, as shown on <br />Map 13a, provide a more efficient means for monitoring the water quality in Fish Creek. Automated sample results, <br />along with system operating parameters are relayed to TCC's Administration Building where they can be reviewed. <br />Current information is, therefore, available for regulating the treatment process at the borehole facility. TC may <br />install additional monitoring equipment in the ponds to further enhance the treatment process. <br />The Fish Creek/Area 1 Pit Transfer Pipeline will be 12 -inch welded HDPE pipe, buried approximately 5 feet deep <br />within existing pipeline and road corridors, as shown on Map 24 (Sheet 3/3). The approximately 16,900 foot pipeline <br />Will cross under Routt County Road 27 (bored under), Haulroads B-1 and C and the Batch -Weigh Haulroad, Foidel <br />Creek (at an existing creek crossing), and the overland conveyor. Pipeline construction will involve removing and <br />temporarily windrowing soil materials along the edge of the pipeline corridor; trenching and temporary placement <br />of the excavated material on the opposite side of the trench; bedding, placement, connection, and testing of the <br />pipeline. controlled backfilling and compaction of the excavated material over the pipeline; and replacement, <br />grading, and reseeding of the soil material over pipeline disturbance areas. Access manholes may be established <br />along the pipeline route for inspection and maintenance purposes. Soil materials will be replaced following <br />completion of pipeline installation. Reseeding of the disturbed areas will be completed during the first <br />appropriate planting period following soil material replacement. <br />In February 2016, an undetected blockage in the pipeline between the Fish Creek Mine Dewatering Well and the <br />Electro -Coagulation Building caused a pipe joint in the well -head to fail and the pumped material to build-up in the <br />vertical culvert around the well -head and overflow, resulting in an accidental discharge of a water/coal fines mixture. <br />At the time the accident happened, the initial inspection indicated a limited discharge volume and that any deposition <br />of coal fines was confined to the immediate area of the well -head and an upper bench area. There was significant <br />snow -cover at the time, and it was difficult to assess the extent of any further movement of coal fines under the snow. <br />Once the snow melted in the spring, it was discovered that the coal fines had moved further than <br />originally thought, and TC placed wattles just beyond the limit of the visible coal fines to prevent them <br />from moving any further, with the intent of cleaning up any coal fines deposition once the ground dried - <br />out. During a CDRMS Inspection in May 2016, the area was inspected and the CDRMS Inspector <br />issued a notice of Violation (NOV CV -2016-001). <br />Consistent with both the original intent. and applicable NOV abatement requirements, TC proposes to <br />cleanup any significant accumulation of coal fines which could adversely impact vegetative growth or <br />which represents a reasonable potential source for sediments which could affect runoff water quality. <br />As noted in the CDRMS May 2016 Inspection Report, "A portion of the fines southwest of the FC Pump <br />CMP affected an area on a steep slope that is heavily vegetated with shrubs and grass. The fines in this <br />area ore very light and do not appear to be impacting the plant growth. To the northwest of ' the FC <br />Pump CHIP, the fines collected in a low spot in the topography and are several inches deep.". Given <br />this observation and assessment, TC proposes to remove any significant coal fines accumulations, <br />focusing on the area right around the well -head and the lower area, and leaving the steep outslope area <br />undisturbed. In order to assure effective control of runoff and sediment from both the affected and <br />cleanup areas both during and following the cleanup effort, TC will check the existing sediment controls <br />(wattles) previously placed at the site, and replace or supplement these controls, as appropriate. Any <br />significant accumulations of coal fines will then be removed and the recovered coally material will be <br />temporarily placed in the nearby bermed basin on the 15 -Left Shaft Pad, with subsequent removal and <br />transport to an approved coal refuse disposal facility. During this cleanup, reasonable care will be taken <br />to minimize disturbance of the in-place soil resources. <br />MR16-297 2.05-50.3 06/07/16 <br />