The value of new construction starts through the first two months of 2009 totaled just $52.7 billion, or 45% less than the opening two months of last year, according to McGraw-Hill Construction. However, the year-to-year declines are skewed by comparisons to five megaprojects started in the first two months of last year, which totaled over $12 billion. “If these five unusually large projects are excluded from the January-February 2008 statistics, the nonresidential building market for the first two months of 2009 would be down 35% [instead of 51%], while total construction would be down 37%,” says MHC’s chief economist Robert
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.