Laserfiche WebLink
unnamed dry creek appears to have significant amounts of allinial <br />gravels and cobbles deposited by the Ancient Vortli Fork of t. lie <br />Gunnison River, mired with significant amounts of alluvial depos- <br />its. The c•olluvial depnsitti npl~ear t.o increase iu relit ire <br />amounts at the higher elevations, generally above ti200 feet. <br />The colluvial soils and possibl}• some of <br />the alluvial gravels and cobbles could be utilized for sr.il coyer <br />and revegetation purposes. The larger cobble and boulder size <br />rocks would need to be separated. <br />Tlce alluvial ,ravels 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 f i 11 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 />Bowie member could be utilized in areas where relatively 1ow• <br />water permeability strata or layers are required. <br />Ttre large, boulder size fragments of <br />sandstone found in this unnamed gully and particularly associated <br />with more recent slope failrtre at the "D" coal seam area, mad lie <br />found to be oP sufficient durability that use as a rock buttress <br />material for slope construction may he feasible. <br />POTENTIAL DESIGN/CONSTRUCTION CONCERNS <br />The location of the top of tlce Rollins <br />sandstone identified by Lin<•oln DeVore, should be confirmed i,~ <br />6 <br />