A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Tunnel, 38-ft wide and 38-in. high is driven through crystalline limestone rock formation; since yardage involved did not warrant large outlay for drill jumbo, it was decided to drive tunnel in three lifts; top lift was drilled with jointed rods; second with combination of 24 ft horizontal holes on 4-ft centers and 12-ft vertical holes; bottom lift was drilled on 4×3 ft spacing.
Tunnel, 38-ft wide and 38-in. high is driven through crystalline limestone rock formation; since yardage involved did not warrant large outlay for drill jumbo, it was decided to drive tunnel in three lifts; top lift was drilled with jointed rods; second with combination of 24 ft horizontal holes on 4-ft centers and 12-ft vertical holes; bottom lift was drilled on 4×3 ft spacing.
Diversion tunnel at box canyon
Western Construction
Roberts, B. (author)
Western Construction ; 28
1953
2 pages
Article (Journal)
English
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Glen Canyon Dam Diversion Tunnel Outlets
| ASCE | 2021
Discussion of “Glen Canyon Dam Diversion Tunnel Outlets”
| ASCE | 2021
Closure to “Glen Canyon Dam Diversion Tunnel Outlets”
| ASCE | 2021
Engineering Index Backfile | 1957
Black canyon diversion dam, Boise project, Idaho
Engineering Index Backfile | 1929