_INSPECTION - C1980005 (34) - Laserfiche WebLink

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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. The SLA Phase 1 bond release inspection report was issued 8/24/06, based on inspection conducted 8/7/06 through 8/11/06. Maintenance problems noted in the SLA inspection, potentially relevant to the SL-3 inspection, included the following: (a) Road ditch erosion along a segment of the South Light Use Road; (b) Ruts along northern section of Road El; (c)Old drill hole not properly backfilled along fence line due south of PM-613; (d)Slide associated with seep from reclaimed highwall south of Pecoco Pond; (e) Minor erosion in PM-6 channel above Stock Pond T-32; (f) Minor rilling on east side of PM-6 below Road F; (g) Rills in PM-4 watershed above beginning of the PM-4 channel; (h) Erosion along PM-23 channel; (i) Minor erosion along PM-2 channel; 0) Substantial gully on south side of Channel PM-22; (k)Gully in Channel PM-10 just below the Solid Waste Disposal Area; (1) Gullied tributary drainage that enters PM-10 from the west, north of Stock Pond T-4; (m)Small hole in area of reclaimed highwall south of the gullied tributary. Additional maintenance problems (not related to"Pre-law" areas) noted in inspections subsequent to the SLA inspection, include the following: (n)"Problem"weeds were noted in several reports, notably in the vicinity of stock ponds and sediment ponds; (o) Rill erosion on South Road B; 10/11/07 inspection; (p)Slump in East Wadge Area, north of Pond 8; 5/29/08 aerial inspection. Status of these previously identified problems, based on observations made during the SL-3 inspection, is as follows: (a) Ditch erosion along the South Road noted in original inspection was apparently repaired, based on subsequent inspection report comments. However, based on SL-3 inspection, a steep segment of ditch along the road between Pond 004 and Pond 008 has eroded, and repair is warranted. See Photo 3975, and GPS Feature#39, in the attachments to this report. This eroded ditch segment was not identified on the 2008 Rill and Gully Survey Map. (b)The specific location of the ruts noted along the northern section of Road E1 is not clear. During the SL-3 inspection, minor rilling was noted along and adjacent to the Road E1 travel surface in the vicinity of Channel PM-22, which may have contributed to a hillslope gully that runs north into the upper reach of PM-22. Photo 3958 shows minor rilling adjacent to road travel surface in this general vicinity. Installation of water bars is warranted along this section of road,to minimize concentrated runoff. Seeding will be warranted in association with rill repair/water bar construction along the disturbed area adjacent to the travel surface. (c)The open drill hole noted in the original report was noted subsequently on an inspection of 4/26/07. Status was not checked during the SL-3 inspection. It will be checked on follow-up inspection, prior to issuance of a proposed decision on SL-3. If the hole has not yet been properly reclaimed, it will need to be reclaimed prior to issuance of the SL-3 proposed decision. d), (h), and (i) pertain to erosion and slide features immediately south of the Pecoco Pond. Repairs to these features were undertaken in 2007, and they appear to be stabilizing. An old slide feature on the upper portion of the reclaimed highwall is well vegetated. An adjacent slide area slightly higher on the slope was repaired last year, as was a small slide lower on the slope and further to the south, associated with a saline seep. These features are shown on Photos 3951 (reclaimed section of highwall slope with the three slide areas), 3955(older vegetated slide feature high on slope)and 3956(slide repair/seep area at toe of slope). The upper slope slide area is GPS Feature 2. There does not appear to have been further movement this spring on the slope, and 5