_INSPECTION - C1980005 (9) - Laserfiche WebLink

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L. o C n III. COMMENTS-COMPLIANCE Below are comments on the inspection. The comments include discussion of observations made during the inspection. Comments also describe any enforcement actions taken during the inspection and the facts or evidence supporting the enforcement action. A series of five erosion control ditches ("V Ditches 1 through 5"), run from southwest to northeast across the East Wadge slopes, and feed into PM-8. Downstream from the East Wadge Area, PM-8 drains into Sediment Pond/Permanent Impoundment 008. The East Wadge Area was included by SCC in the SL-1 application in 2006,but the area was excluded from the Division's SL-1 approval, due to extensive hillslope and channel erosion in the PM-8 watershed. The following excerpt is from the Division's 12/27/06 Proposed Decision document for SL-I: Based on the observations made during this inspection it is apparent that the design is no longer functional. The East Wadge Pit area beginning above the shrub plot study area all the way down to the South Road will need to be reevaluated to provide stable slopes and effective post-mine drainage control. One problem that has been noted in the past is that the temporary diversions constructed to divert water away for the shrub plot have concentrated the flow of water elsewhere resulting in significant gully formation. SCC will need to reevaluate the surface water runoff control plan for the entire location described above. This area will require reconstruction grading. If major disturbance of the area is caused by the regrading work, SCC should consider reseeding the area. SCC was notified during the Phase I bond release inspection that the East Wadge Pit area is not functional or stable, and therefore not eligible for Phase I bond release. The PM-8 drainage designs for the East Wadge area excluded from the SL-1 approval were revised within Technical Revision No. 41 (TR-41), approved by the Division on June 11, 2007. The TR-41 designs included modifications to the PM-8 channel design and extension of the channel further up-slope, including a segment lined with turf reinforcement mat(TRM). The plan specified elimination of certain erosive tributary channels, and addition of a series of five erosion control "V-Ditches", to be constructed at relatively shallow grades across the hillslope west of the PM-8 channel. The V-Ditches were designated V-Ditch#1 through V-Ditch#5, with V-Ditch#1 located high on the slope, and tying into the upper end of PM-8. Ditches V-2 through V-5 were spaced along the slope below V-1, with V-5 located a short distance up-slope from the endpoint of the South Road. All of the V ditches were designed to drain into Channel PM-8. Extensive rill and gully repairs and channel construction to implement the TR-41 designs 3