Call it a sidewalk shed or bridge: pedestrian protection by any name is viewed as a Big Apple eyesore to many, including local building officials and the New York chapter of the American Institute of Architects. Through a design competition, they are trying to improve the covers, which they say number 6,000 and add up to more than 1 million linear ft of unsightliness. Photo: Sawyer / ENR There are more than 6,000 sidewalk sheds in New York City that many consider ugly. Photo: Sawyer / ENR Competition may boost protection. On Aug. 13, the New York City Dept. 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.