Construction of 22-mi Bartibog-Heath Steele line, Ont; self-propelled mobile rock drill was engaged to drill 6 in. holes for blasting in rock cuts, and each shot used 2000 lb of 60% Dynamex; ties are distributed by motor truck along completed subgrade, ahead of any other operations; then self-propelled hoist, hauling two flatcars containing rail, tie plates, rail anchors and fastenings, starts laying rail on ties.
Swamp, gullies and hardrock on CNR project
Eng Contract Rec
Engineering and Contract Record ; 70 , n 5
1957
Aufsatz (Zeitschrift)
Englisch
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Ephemeral Dark Spots Associated with Martian Gullies
NTRS | 2001
|Engineering Index Backfile | 1929
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