Senior Editor Tom Sawyer wrote this week’s cover story after shadowing members of the American Society of Civil Engineers and their Japanese counterparts as they examined debris from the March 11 tsunami in Japan. The team searched for clues for improving design standards for all kinds of buildings and infrastructure that may face a tsunami in the future. It left Sawyer determined to bring home the message that the only possible gain from such tragedies is to learn from them and act on the knowledge. From left: ASCE tsunami team leader Gary Chock, ENR’s Tom Sawyer and members of the
Arch dams, classically curved monoliths situated in narrow valleys, are not as common as other types of dams, such as embankment dams and gravity dams. ENR takes a look at some of the biggest arch dams in the world, both completed and under construction.