_GENERAL DOCUMENTS - C1981017 (230)

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1) Dutch Creek Diversion - $90,000 Dutch Creek had long ago been placed in a flume where it emptied into Coal Creek. The flume was failing and significant erosion would result when it failed. Therefore, DMG applied for and received monies from the Office of Surface Mining to reroute the creek. This task was accomplished in 1998. OSM designed the new channel as a two-stage compound channel to accommodate the normal high flow as well as major event flow. Constructing the channel involved moving about 35,000 cubic yards of material (some more than once) to establish the new channel, and armoring the channel with 3,750 cubic yards of riprap. In 1994, 1 paid a contractor$17.20 per cubic yard to place riprap along an existing stream. Placing 3,750 cubic yards of riprap for $17.20 per cubic yard would have accounted for about $65,000, which would have left $25,000 to move 35,000 cubic yards of material. This project also appears to have been done very cost effectively. 2) Huntsman Project (slope reduction of Old Refuse Pile above Coal Creek) - $209,000 The Old Refuse Pile was placed at a steep angle immediately adjacent to Coal Creek. As such, it was eroding into the Creek and was threatening to mass-fail into the creek. The DMG applied for and received monies from the Inactive Mined Land Section of DMG (IML) to reduce the slope of the pile where it was threatening to fail into the creek. The task consisted of moving 60,000 cubic yards of refuse a distance of approximately 0.3 mile from the Old Refuse Pile to the Warehouse Area, including sediment control, compaction, and revegetation. Moving material that far, and compacting it, for $3.50 per cubic yard is quite cost effective. The project I managed in 1998 moved material (albeit a lesser quantity) a shorter distance with no compaction for $5.00 per cubic yard. 9