Photo courtesy of MassDOT 'We are looking forward to working with the industry to improve project-delivery approvals,' says Richard Davey, Secretary, Massachusetts Dept. of Transportation Richard Davey is the new Secretary of the Massachusetts Dept. of Transportation. Only 38, he aims to use social media to make the agency more transparent. As general manager of the state Bay Transportation Authority for three years, he rode with T-line riders, hosted customer lunches and became a local celebrity. Davey's recent interview with ENR has been condensed and edited.ENR: What are the state's top-priority projects for the next few years? Davey: We are
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.