Through three wars, plans for an underground metro in Iraq’s capital city languished in a “pending” file. Now Baghdad municipally has signed a contract with a French firm and is dusting off decades-old designs for a 40-kilometer system. Map by Walter Konefal Planned Baghdad Metro The government also aspires to develop a separate plan for a 25-km elevated transit project as well.French design firm Systra S.A., Paris, now is mobilizing for 18 months’ work to develop the two-line metro project sufficiently for the city to solicit an engineer-procure-and-construct contract. Under Systra’s agreement, signed May 27, Systra also will advise on
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.