Rising materials prices coupled with aggressive bidding in a down economy have raised concerns that a new wave of contractor defaults may be on the horizon. While the contracting community proved more resilient during the downturn than some had predicted, many firms that bid aggressively in recent months and slashed profit margins face considerable hardships as prices for materials and consumables continue to rise. Related Links: Economics: Japan Quake Won�t Shake Up Costs as Recession Trumps Rising Prices Confidence Survey: Top Industry Execs Believe the Market Has Turned a Corner Asphalt: Weak Demand vs High Oil Prices Executive Compensation: Companies
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.