In a boom defying the national bust, Oklahoma City is witnessing approximately $2 billion worth of public and private development. The state capital’s major weapon against the Great Recession is its 17-year-old Metropolitan Area Projects program, designed to put the city back on the map through civic renewal that attracts private investment. Designed to be 850 ft tall, the Devon World Headquarters Tower is on course to become the tallest building in Oklahoma. Last December, voters approved the $777-million third phase of the capital improvement program, called MAPS 3. In three votes since 1993, voters have committed $1.8 billion to
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.