With statistics in for November, it looks pretty certain that construction markets will come in well below 2008’s level. The dollar value of construction starts through the first eleven months of this year was $381 billion, which was 28% below the same period a year ago, according to McGraw-Hill Construction (MHC), of which ENR is part. The annual declines were broad based, including 34% declines for both residential and non-residential buildings and a 12% drop for non-building construction. The non-residential building market was sapped by year-to-year declines of 39% for office buildings, 44% for stores, 63% for warehouses and 66%
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.