The whole was built in a cofferdam, quite dry, and the opening was a holiday.
The lower part of C bulkhead was doubled and was in the form of a cofferdam.
Referring to the cost of cofferdam work, we see that, in order to excavate the 58 cu.
A hand pump served to keep the cofferdam dry enough for excavating; but in more open material a power pump is usually required.
And the night shift began to repair the cofferdam for old Jezebel had dropped suddenly back into her old trail.
The foundations were put down by means of a cofferdam which was kept dry by pumping.