More rough waters lie ahead for the worldwide construction industry, according to IHS Global Insight Construction Service, Lexington Mass., which predicts further decreases in construction spending. According to first-quarter data from 69 markets, IHS predicted construction spending would remain flat in 2010. However, Laura Hanlon, the research firm’s product manager, admits that, in light of recent economic turmoil, the first-quarter outlook was a little overly optimistic. “As of quarter one, we were still optimistic for a flat 2010,” said Hanlon. “However, we just released a new forecast [on June 30], and with the information we have received through quarter two,
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.