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-3- <br /> <br /> <br />~.~ `c <br />' • ~ %~; .; <br />:moo <br />=r~m <br />site grading to achieve final grade levels. From Station 0+00 to approx- <br />imate Station 24+00, within test hole locations 1 through 3, the site Is <br />generally low-lying pasture with relatively soft surface soils and shallow <br />ground water conditions. Beyond th(s area, the alignment climbs and cuts <br />through an east west trending ridge within test hole locations 4 through 6, <br />and daylights Into the Dry Creek drainage basin a[ approximate Station 43+00. <br />The maJorlty of the remaining alignment is situated within this drainage <br />with exception of the approach to the train loadout structure which cuts <br />through an east-west trending ridge on the southwest side of the basin. <br />hbderate fill section depths are typical with maxlmuM depths occurring at <br />the maJor culvert areas. The basin area and surrounding hillsides are <br />predominantly pasture and farmland and the ground surface varies from <br />befog moderately firm to vary firm. <br />GEOLOGIC SETTING <br />Thn Hayden Gulch railroad spur facility is situated within [he Dry Creek <br />and Yampa River Valley basins and adjacent terrace escarpments. Two maJor <br />escarpment areas will be transacted, one lying between thn Yampa River and <br />Dry Creek basins and the other between Dry Craek and Stokes Gulch. Thn <br />latter escarpment, on which the coal handling facility will be situated, <br />Is strongly s{oping dawn to the east and connects the valley floor of Dry <br />Craek with the nearly fiat terrace surface to the west. <br />From 14 to 20 feet of alluvial soils were encountered overlying <br />claystone bedrock in the exploratory holes dri{led within the.~Yampa River <br />Yalley. These soils consist predominantly of sand, gravel, and cobble <br />1 alluvium with thin (1 to 4} feet) overlying sandy clay surface colluvlum. <br />Relstively deep (to 33 feet) sandy c{ay colluvlal soils were encountered i <br />3 <br />