A new global engineering and design-build giant is set to emerge at month’s end as CDM, the Cambridge, Mass.-based design firm-constructor specializing in environmental infrastructure acquires Wilbur Smith Associates, the Columbia, S.C., transportation engineer. The transaction, under way since early 2010, will create a $1.2-billion company that meshes in culture, specialties, employee ownership and international presence, its executives say. The acquisition, which is set to wrap on Feb. 25, creates a company with about 5,700 employees, about 25% of whom are based abroad, says Richard D. Fox, CDM chairman and CEO. SMITH FOX M. Stevenson Smith, Wilbur Smith’s chairman 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.