Chicago : Engineering and Contracting Pub. Co. · leaf 668
point of the drives. The breastboards should be removed in the order num-bered, first taking out a short one, then along one, and proceeding as above until allare ahead. Fig. 10 shows a succeeding andFig. 11 the final stage of the work. The dirtcan be removed after taking out a breastboard, by… … IngHContg The concrete buttresses for the cofferdamerected on the caisson sill at the lower end ofGatun Locks will be sixty days old about themiddle of December, and by that time thefacing of the cofferdam will be finished. Suetion dredges will then proceed with the re-moval of the earth dike in…
Buildings
Internet Archive · University of Illinois Urbana-Champaign · Public Domain Mark 1.0. Free to use for anything.
