Even with many sealed lips about project fates, evidence of the credit crunch can be vividly seen in stilled excavations and incomplete, mothballed commercial and residential structures from New York City to San Francisco. Developers in New York City alone have stopped construction on at least 30 sites, says the buildings department, while the local Building Trades Employers’ Association (BTEA) reports nearly $5 billion of delayed or stalled projects. Slide Show Tempe work stopped in 2008. Photo: The Firm PR. Work on Vegas twin-tower resort-casino halted. Construction also is slow on the West Coast. In California, the dollar value of
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.