INSPEC21744 - Laserfiche WebLink

Home Browse Search

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. This was a complete inspection of the Seneca II Mine conducted on November 15, 2001 by Mike Boulay of the DMG. Robert Shevling of Seneca Coal Company (SCC) was present during the inspection. Weather conditions were sunny and warm. Ground conditions were dry throughout the mine site. A dozer was working at the postmine drainage channel location PM-1. This was the only activity at the site during this inspection. Hydroloeic Balance Constmction of several postmine drainage channels remains to be completed at the Seneca II Mine site. These include PM-1, 4, 5, 6, 8, 12, 13, 16, and 20. Construction of PM-1 was in inspected. The channel has been graded to its final configuration, a liner has been placed in the upper portion of the channel and riprap was being hauled and placed in the channel bottom. The fabric liner at the PIv1-I location was noted to be folded under in some locations or not properly keyed in along all edges. As discussed during previous inspections and during the final permitting of the postmine drainage and topography design, use of fabric liners under riprap can be problematic if not installed properly. If used, fabrics must be properly keyed to avoid undermining of the installation. Additionally, the fabric and entire channel cross section must be covered with the appropriate rock thickness, with no gaps in the rock along the channel. It was specifically noted during this inspection that at the entrance to PM-1, the liner was not keyed in properly. Please take steps necessary to ensure that fabric liners at all postmine drainage channel locations are keyed at channel entrance and exit locations, and along all edges to avoid erosion below the fabric. Postmine Drainage Channel PM-4 was also inspected. Rills 1-2 feet deep aze forming at the head of this channel in the revegetated slope above the channel inlet. The fabric liner has been damaged and partially deteriorated at the entrance to this channel. Please replace and properly key in the fabric liner at the entrance to PM-4 and repair the rills that have formed in this azea. As noted in the previous inspection (see Inspection Report dated 10/25/01), sediment removed from the channel bottom of Postmine Drainage Channel PM-6 had been stockpiled across PM-6 at the upstream side of the Road E1 Dry Stream Crossing. As requested, the stockpiled sediment has been removed from the PM-6 channel and the channel bottom has been graded in prepazation for riprap placement.