After a 12-month experience rivaling the most hairraising theme-park thrill ride, transportation design firms are finally enjoying a sense of stability, coupled with some optimism about the future. The industry’s biggest influence in recent months has been $40 billion in transportation infrastructure funding from President Obama’s economic stimulus program. Though directed primarily to shovel-ready projects, the stimulus funding is also finding its way to design firms, according to Jim Lyman, chief operating officer for David Evans & Associates, Portland, Ore. Photo: Vince Streano Photography Bridge programs remain strong as a direct result of the I-35 collapse. Related Links: The Top
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.