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unnamed dry creek appears to have significant amounts of alluvial <br />gravels and cobbles deposited by the Ancient North Fork of the <br />Gunnison River, mixed with significant amounts of alluvial depos- <br />its. The colluvial deposits appear to increase in relative <br />amounts at the higher elevations, generally above 6200 feet. <br />The colluvial soils and possibly some of <br />the alluvial gravels and cobbles could be utilized for soil cover• <br />and revegetation purposes. The larger cobble and boulder size <br />rocks would need to be separated. <br />The alluvial gravels and cobbles, if <br />encountered in sufficient quantities during construction, could <br />conceivably be utilized for portions of the subsurface drain <br />beneath the coal mine waste bank, as select fill for road con- <br />struction and improvement and as select backfill behind slope <br />retaining structures. <br />The very weathered clay portions of the <br />Boccie member could be utilized in areas where relatively low <br />water permeability strata or layers are required. <br />The large, boulder size fragments of <br />sandstone found in t-cis unnamed gully and particularly associated <br />with more recent slope failure at the "D" coal seam area, may be <br />found to be of sufficient durability that use as a rock buttress <br />material Cor slope construction may be feasible. <br />POTENTIAL DESIGN/CONSTRUCTION CONCERNS <br />The location of the top of the Rollins <br />sandstone identified by Lincoln DeVore, should be confirmed by <br />6 <br />