Despite the global recession, a panel of transportation experts meeting in Seattle agreed now is the time to invest in and improve transit systems as part of a comprehensive and holistic solution to pollution and congestion. “The American public had the infrastructure that was once the envy of the world....We let it crumble,” said Patrick Natale, executive director of the American Society of Civil Engineers. “But it’s a new day. We finally have the leadership to take action, and it’s very exciting.” Planning is as crucial as funding. Susan Zielinski, University of Michigan’s managing director of sustainable mobility and accessibility
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.