The total dollar value of new construction starts through the first four months of this year were $125 billion, which was the same amount as a year ago. Image Source: McGraw-Hill Construction Analytics. Construction contract value cumulative year-to-date throught April 2010. While the overall numbers were stable, they mask a large swing in market activity. The housing market is up 34% over last year�s dismal low, while the non-residential building market was down 18% and heavy and highway work was down 2% from a year ago, according to McGraw-Hill Construction data for new construction starts. Leading the decline in the
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.