_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. • There is still an active gully below Road E1 that flows into the upper reach of Channel PM-22, from the south. Source of concentrated flow to the gully appears to be from road runoff, and also from a cow trail along a fenceline south of the gully. The gully ranges from 6"to 18"deep, similar range in width.Remedial measures are warranted, and should include installation of water bars at intervals across the road travel surface and adjacent graded strip, and across the cow trail, in addition to gully repair. The feature is marked on the 2008 Rill and Gully Survey Map. See Photo 3960/GPS Feature#4. Noted previously under"Past Inspections"section of this report. Rill erosion was not observed along South Road B, although a gully segment that warrants repair was noted immediately adjacent to the road in one location. This is the lower end of the "healed gully" in Photo 3972/GPS#33. • An intermittent gully up to 2 feet deep was observed on a steep south facing slope in the Pond 4 watershed, north of the South Road. The gully may have originated from an old road ditch outlet associated with a road that was previously reclaimed. The gullied segment is approximately 150 feet in length (including healed or healing segments, along with segments that have not healed, and exhibit vertical sides and minimal or no vegetative establishment). Along the lower gullied segment, there are two parallel gully channels, approximately 15 feet apart. See Photo 3974/GPS#37. The gully is not marked on the 2008 Rill and Gully Survey Map, but does need to be repaired. A gully that originated from a temporary diversion around a shrub planting area was noted above Road F, south of Stock Pond T-30. The gully is 12 to 18 inches deep, approximately 100 yards in length. Though not marked on the 2008 Rill and Gully Survey Map, both the gully and the contributing diversion need to be reclaimed. See Photo 3981, GPS#21. • A road ditch outlet at the intersection of Road C and Road F had resulted in a gully extending approximately 100 feet down the reclaimed slope below the road. Stabilization measures including installation of water bars up slope along the roads to disperse concentrated flow is warranted. • The slump that occurred this spring and is marked on the Rill and Gully Survey Map is located immediately to the west of Channel PM-10, approximately 100 yards north of a gully reclaimed last year with TRM installation. The failure is approximately 50 feet in diameter with a 12 foot vertical head scarp, with water pooled from a spring at the toe of the failed slope. The feature is located at the site of a former topsoil stockpile location. See Photo 3991. Stabilization would appear to require grading of the scarp and immediately adjacent slopes in the former stockpile location,to reduce the steep grade that resulted from the slight bench-like configuration achieved by original grading. (4)The degree of difficulty and estimated cost to complete any remaining reclamation— The operator has included documentation in the bond release application in support of a requested release of $4,289,419.00 (Application Attachment G). As a component of the bond release evaluation, the Division will review and consider the operator's estimate and justification, and will perform an independent cost estimate reflecting the degree of difficulty and estimated cost to complete remaining reclamation. The Division's estimate will likely reflect substantial reduction of the current liability amount, based on the extent of topsoil replacement properly completed, and successful establishment of vegetation cover. However, the Division will require retention of sufficient bond to cover revegetation costs, until final Phase III bond release is approved, in accordance with Rule 3.03.1(3)(a). In addition, the Division will ensure that the combined Phase 1 and Phase II releases for the 1793.5 acre SL-3 area, will not result in release of more than 85% of the bond amount originally applicable to the SL-3 release area, in accordance with Rule 3.03.1(2)(b). 8