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Construction of 32,000 hp. hydroelectric power unit for Northern British Columbia Power Company, Ltd., at Prince Rupert, B. C.; leaking crib cofferdam supplemented by concrete dam to enable powerhouse construction to proceed; tail race rock blasted under water; commonly known methods impracticable; concrete cofferdam can be re-used.
Construction of 32,000 hp. hydroelectric power unit for Northern British Columbia Power Company, Ltd., at Prince Rupert, B. C.; leaking crib cofferdam supplemented by concrete dam to enable powerhouse construction to proceed; tail race rock blasted under water; commonly known methods impracticable; concrete cofferdam can be re-used.
Unusual procedure for rock excavation
Contract Rec
Mahaffy, H.L. (author)
1931
3 pages
6 Figs.
Article (Journal)
English
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