Photo courtesy of TVA Watts Bar plant unit 2, idle since 1988, is set for 2013 completion. In what it says is an effort to improve efficiency and eliminate confusing lines of authority and duplication of effort, the Tennessee Valley Authority has relieved Bechtel Corp., based in San Francisco, of construction-management duties at the $2.5-billion restart of unit 2 at TVA's Watts Bar nuclear powerplant.The federal power producer renegotiated its engineering, procurement and construction contract with Bechtel Power after the project's schedule slipped during the summer, says Terry Johnson, a TVA spokesman. “Fundamentally, we established a level of productivity, and
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.