Photo by Jim Tetro Park amenities include a rain garden, pavilions, an ice-skating rink and a cafe. Related Links: 2013 Best of the Best Projects Winners ENR Mid-Atlantic 2013 Best Projects: Washington Canal Park The team transformed a parking lot for Washington D.C. school buses on the Anacostia Waterfront into a three-acre park that offers aboveground recreational amenities and a belowground stormwater sewer system. Runoff from seven city blocks is diverted to the system, which includes two underground 40,000-gallon cisterns; tree pits also collect runoff. The reused water provides nearly 95% of the park's needs, saving an estimated 1.5 million
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.