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Concrete arch bridge at donner summit, Calif.
Bridge roadway curved on 360-ft. radius with 7-per cent grade; new route replaces 20 per cent grades.
Concrete arch bridge at donner summit, Calif.
Bridge roadway curved on 360-ft. radius with 7-per cent grade; new route replaces 20 per cent grades.
Concrete arch bridge at donner summit, Calif.
Eng. News-Rec
1926
2 pages
5 Figs.
Article (Journal)
English
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