INSPEC22263 - 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 d~lring the inspection and the facts or evidence supporting the enforcement action. Coal Gulch, which currently bypasses the borrow area, will be diverted and permanently_ routed through the bottom of the borrow area. The "hanging" section of existing channel will be obliterated. North Porta/Area Final reclamation grading, topsoiling and seeding of the North Portal facilities area was completed in the fall of 2002. Regraded contours appear to conform in general to approved topography. No areas of significant settling, apparent instability, or excessive erosion (other than Pond 13 inlet ditch noted above) are evident. Slope measurements documenting apparent compliance were taken by the Division using abney level and stakes in September 2002 (Inspection Report Issued 9/16/021. The need for construction of permanent ephemeral drainage channels across the reclaimed area following removal of the upper diversion ditch and Pond 13 is also addressed in that inspection report, and a plan for installation of the channels has been provided in TR-42, currently under review. In addition, erosion of the Goal Creek channel adjacent to the North Portal site is addressed in that report. The erosion initiated at a channel nick-point at a former haulroad crossing location. Stabilization of the Coal Creek channel segment is also being addressed within TR-42. Certain facilities remain along the perimeter of the reclaimed area, including portions of two topsoil stockpiles, a substation and power line that serve the loadout facility, and the temporary sediment and drainage control diversions, berms, and sediment pond. Exp/osives,Storage Bunker and access Road This small disturbance area is located a short distance to the northwest of the North Portal facility, and was reclaimed within the same time frame. The site has been properly graded to blend into the adjacent terrain, and the surface was extensively roughened, seeded and mulched. A section at the lower end of the small ephemeral drainage along the toe of the reclaimed slope that had previously developed rills had been further stabilized since the previous inspection. Riprap cobble had been placed over a fabric underliner. Coal Creek Permanent Diversion Channel The section of the Coal Creek Channel between the upper dip section crossing and the large double culverts beneath Haul Road 4 is an approved permanent diversion. Approved interim channel stabilization measures were implemented in 2001/2002 associated with CRDA-2 reclamation. Several rock check structures were removed, and the channel was excavated to deepen the channel along the upper portion and to provide a uniform grade through the entire segment. Excavated material was used as cover material on CRDA-2. Riprap channel bank protection was placed along the channel bank adjacent to Sediment Pond 6, immediately downstream from the dip section culvert outlets. Permanent modifications were made at the dip section structure, including installation of concrete wing-walls and dismantling of metal railing.