Cofferdams are pretty awesome

Ingenuity!

Something that always confused me: Cofferdams are temporary while caissons are meant to remain with the construction.

from Boing Boing https://ift.tt/3ccoVwA
via IFTTT

Share on Google Plus

About Unknown

This is a short description in the author block about the author. You edit it by entering text in the "Biographical Info" field in the user admin panel.