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J <br />SCDPE <br /> <br /> ~- <br />-z- - _ <br /> ~ <br /> ~ <br /> Y .~ <br />This report presents the results of a subsoil investigation for a <br />proposed 3~-mile railroad spur alignment to service the Hayden Gulch coal <br />processing facility. The site and subsoil conditions, geologic setting, <br />depth to free water, site grading and construction requirements, together <br />w(th other soil-related design and construction details, are discussed. <br />We have previously reported the results of geotechnical investigations <br />at the processing faclllty under our Job Nos. 15,169 and 15,169A. <br />PROPOSED CONSTRUCTIOH <br />The railroad spur alignment shown In F(gs. 1 and 2 will serve as the coal <br />• <br /> <br />transport system to the main line approximately 2 miles north of the loadout <br />facility. The proposed rail system will be supported entirely on a graded <br />earth bed with at-grade road crossings and culvert drainage structures. Cut <br />and fill sections to a maximum 29 and 34-foot depth will provide grades rang- <br />ing between -1.0$ and +2.25. Fig. 3 shows the approximate road crossing and <br />culvert locations together with approximate cut and fill depths and track <br />grade requirements throughout the alignment. A crest width of 28 feet Is <br />proposed for embankment fill sections. Typical cross-sections of cut and <br />flit areas at the fast hole locations are shown in Figs. 8 through il. <br />Approximately 6~feet of cut is proposed at bhe train loadout structure. <br />SITE CONDITIONS <br />t <br />i <br />The alignment begins at the present D6RG railroad track ~y mile east of ~I <br />Hayden. It runs south parallel to County Road 33 about 2 miles and loops ?, <br />west to the loadout facility, which Is 2 miles southeast of Hayden. <br />Topographic relief Is quite Irregular and will require considerable ,i <br />_ t` <br />~i <br />.,. ~t, ... `.~. "~" <br />