AP WIDEWORLD Damaged tower crane remains dangling days after Hurricane Sandy struck the region. Related Links: Dangling Crane Was Weather-Vaned, Contractor Says Partially Collapsed Crane at NYC "Billionaire's Haven" Updated: Construction crews successfully tethered a dangling tower crane on West 57th Street in Midtown Manhattan on Nov. 3, allowing nearby buildings to re-open.Using a wrench on the turntable's pinion gear, workers hand-cranked the jib closer to the One57 building and then used cables to tie down the boom. Residents were soon after allowed to re-enter nearby buildings, which were closed for days after Hurricane Sandy struck the region.Emergency repair work
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.