By its nature, the construction industry is an optimistic group. However, by the end of the “summer of recovery,” firms’ rosy view that better times were right around the corner has been tested and found wanting. Major contractors, engineers, subcontractors and construction service firms have concluded that the industry recession will last for the foreseeable future and that they need to be prepared to hold on for as long as it takes. + Image Related Links: Economics: With Margins Cut to the Bone and No Demand, Costs Are Left With Nowhere To Go Cement: New EPA Regs Pose Cost Problems
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.