Related Links: Related Story: Resilient Systems Not Yet Tested by a Quake Structural engineer Steven Tipping doesn't often attend industry events, let alone introduce himself to keynote speakers. But he is glad he did just that on Dec. 5, 2007. So is the team for the $145.5-million San Francisco Public Utilities Commission Headquarters, a nearly finished job with a difficult past.Tipping's actions at the Dec. 5 breakfast—at which a project of his was recognized and he heard Webcor Builders' Phillip Williams speak—inadvertently helped recenter the ailing job. The 13-story showcase for sustainable design and construction owes its existence, in part,
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.