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Two small slumps occurred at Coal Stockpile B during February of 1998. These were <br /> repaired during the 1998 construction season, however, snow that fall prevented topsoil <br /> application and revegetation of the western most failure in 1998. This was accomplished <br /> in the fall of 1999. Topsoil was applied to the western failure following completion of <br /> final grading. Weed free mulch was applied to the surface of the facility, and it was then <br /> roughened using the trackhoe divot method described in the Bear Creek Project. <br /> The lower Sutey access road (located to the east of the Sutey Refuse Pile), and a portion <br /> of the main Sutey access road (located north of the Thompson/Willison road) were <br /> reclaimed. The lower Sutey access road was almost completely pulled back, topsoiled, <br /> mulched, roughened using the trackhoe and seeded. The main Sutey access road was <br /> graded toward the Sutey drainage ditch, mulched, roughened using the trackhoe and <br /> seeded. <br /> During settlement negotiations, the land owner stated that they wanted Road A to be <br /> passable to most vehicles. Therefore, Road A was graded from the Lamp House to the <br /> former location of the Wash Plant, so that the road surface drains toward the inside ditch. <br /> The target grade of the road in cross section was two percent to the inside ditch. <br /> However, field observation indicated that in a few areas, grading to achieve this goal <br /> would result in large depressions in the road, probably leading to significant drainage <br /> problems. In order to accommodate the road drainage characteristics which were desired, <br /> three gravel filled dips were constructed on the road in order to promote runoff to the <br /> inside ditch. <br /> Rock Tunnel Construction Area <br /> Two tasks were accomplished at this area; removal of the Road E culvert, and <br /> construction of a drainage ditch on the Rock Dump. <br /> The approximately twelve feet diameter culvert located on Road E at the North Fork of <br /> Dutch Creek(located on property managed by the Forest Service) was removed. During <br /> removal, the grade of the North Fork channel bottom was matched above and below the <br /> culvert location. Side slopes were graded so that a 2 H : 1 V or gentler slope was <br /> created. The cut material was placed outside the flood plain on both the north and south <br /> sides of the channel. The cut materials and the side slopes were mulched, roughened <br /> using the trackhoe and seeded. A low water crossing, capable of accommodating a pick <br /> up truck, was constructed on the upstream side of culvert excavation. <br /> In past years, erosion of the north facing slope of the Rock Dump has been noted. <br /> Gullying in this location is attributed to the accumulation and melting of snow on this <br /> side of the facility. Re-grading of the area in the past has not significantly diminished <br /> gullying. Therefore, a drainage ditch was constructed to intercept the melt out, and <br /> transport it to a large conveyance ditch built in 1996 on the south side of the pile. To <br /> transport the melt out to the south side ditch, the newly constructed ditch must negotiate a <br /> fairly steep slope. It is possible that erosive velocities may be reached in this stretch of <br /> the new ditch. This area will be monitored during the 2000 runoff, and maintenance will <br /> be accomplished as necessary. <br /> 9 <br />