Keefer, Thomas, C., 1821-1915, American Society of Civil Engineers · [S.l.] : American Society of Civil Engineers · leaf 29
y a horizontal flatted sillacross the track below subgrade, and the outer rows by similar butsloping braces between the tops of the inner and outer piles. A singlelog is run behind the ditch piles under the sloping brace, and a wall ofabout five logs high is carried up behind the outer row. The… … Fig. 3. THE CANADIAN PACIFIC RAILWAY. 75 The gumbo of the Selkirk slopes is not the material called bythat name in California, where it is found upon the surface of levelplains, and bakes and cracks with the sun, but becomes a sticky mudwith every rain. The Selkirk material is a sandy loam quick…
Canadian Pacific Limited · Railroad engineering
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