A new Associated General Contractors of America survey shows that member firms see some encouraging market signals this year but also indications that 2011 still will be tough. Related Links: AGC National 2011 Construction Outlook Survey Results The 2011 AGC outlook survey report, released on Jan. 24, sums up its findings: "Despite predictions of slight growth in demand for several key construction sectors and an improving construction employment picture, construction firms are bracing for at least one more difficult year as the benefits of the stimulus begin to fade and overall demand for construction remains weak." AGC CEO Stephen E.
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.