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indicated that the liner specified for ditch 8 would fail due to <br /> the severity of the slope and the resultant water velocities. This <br /> was confirmed by the manufacturer of the design materials after a <br /> site visit. A two layer, heavy duty liner system was recommended <br /> for this slope condition and anticipated runoff velocity. This <br /> resulted in increased material and installation costs. <br /> OTHER FIELD ACTIVITIES <br /> Field work in support of potential reclamation projects for 1996 <br /> was accomplished during the summer. The primary focus of this <br /> effort were the Rock Tunnel entry area, the Rock Tunnel Waste Dump, <br /> the fan entries at the 3 and 5 Mines and the associated access <br /> roads, and the haul roads leading to Mines 3 , 4 and 5. <br /> Drawings and site measurements were made at the Rock Tunnel entry <br /> area in order to provide detail for a reclamation bid. <br /> Measurements of the highwall and entries were made, the volume of <br /> concrete which must be demolished and disposed of was determined, <br /> and the area to be revegetated was estimated. <br /> The Rock Tunnel Waste Dump was surveyed in detail using the total <br /> station survey instrument. From the survey data, a topographic map <br /> of the dump was created. This was necessary because a map showing <br /> current topography of the dump has not been located in the permit <br /> or files. From this map, a post reclamation topography map will be <br /> created. These maps may be included in a reclamation bid in order <br /> to provide a clear picture of the reclamation expectations for this <br /> area to prospective bidders. <br /> The 5 Mine fan entry (in a canyon south west of the mine entries) <br /> was visited and a reclamation concept was developed. The entry has <br /> been previously backfilled and the highwall remnant is sufficiently <br /> sloughed so that additional backfilling is not necessary. <br /> Hydrologic control and revegetation efforts will be the focus of <br /> the project. <br /> The 3 Mine fan entry is located south west of the 3 Mine entry <br /> area. This site was visited and determined to be sufficiently <br /> covered by sloughed material from upslope. No further backfilling <br /> work is contemplated at the entry. Hydrologic control and <br /> revegetation efforts at the area will be undertaken. <br /> The access roads which lead to the 3 and 5 Mine fans were surveyed. <br /> The inclination (angle of the road perpendicular to the road <br /> centerline) and slope (angle of the road parallel to the road <br /> centerline) were periodically measured. Observations of <br /> construction characteristics (roads built on fill or through rock <br /> cuts) and geologic conditions (roads constructed through colluvial <br /> soils or through consolidated materials, presence of avalanche <br /> 11 <br />