OCR

Total quantities of principal items of material incorporated into the completed railroad are impressive, comprising: Rail, 90 lb., new 19,054 Tons Rail, 90 lb., relayer 2,127 Tons Ties, treated timber 378,500 Each Tie Plates 750,000 Each Angle Bars 72,300 Each Gauge rods 26,300 Each Rail Anchors 425,000 Each Track Bolts - 210,000 Each Spikes 3,750,000 Each Ballast, crushed gravel 407,650 C.Y. EXCAVATION AND GRADING in order to maintain a practical balance between the constant-effort to minimize overall total excavation quantities while yet allowing a maximum progress rate, various grading procedures' and. methods were required. Experience soon revealed that the specified 4.40 motor bottom width in through cuts was impractical for efficient shovel operation in the lower portions. An experiment with the use of Eimco loaders and Kohring Dumptors for such removals did not prove satisfactory because of excessive equipment wear and down time. Where the typo of matrial permitted, extensive and satisfactory use of dozers and scra[ers was made in the lower portions of such outs. In others, particularly those adjacent to fills requiring borrow material, bottom of cut widths were increased toward the outside, allowing shovel work. And in still others, lower cut slopes were daylighted. Final backslope determination also proved difficult due to varying classification of materials encountered. Generally speaking, the usual procedure followed was to stake cut slopes for excavation as steep as preliminary examination of visible materials indicated they might stand. If the original determination proved itself accurate at completion of excavation, slopes were scaled and trimmed only. If some doubt as to