One of the world’s most ambitious urban development initiatives is taking place in Doha, the capital of the Gulf kingdom of Qatar. Photo: Courtesy Of Hochtief Infrastructure master plan includes commercial and residential centers, along with an airport and seaport. Even in a region known for brash city-building, Qatar’s plans will radically enlarge its urban footprint in the next decade to accommodate hundreds of thousands of additional residents with new housing, commercial and tourism centers through about a half-dozen projects. These projects include a plan by the state-owned developer Dohaland to re-create Doha’s downtown using more traditional Gulf architecture; further,
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.