Tutor Perini Corp., Sylmar, Calif., has purchased Fisk Electric Co. for $105 million in cash and an undetermined amount based on future results. Privately held Fisk reported 2010 revenue of about $305 million and a $190-million project backlog, although both dropped this year. The firm has worked with Tutor Perini on several projects, including the $8.5-billion CityCenter in Las Vegas. Based in Houston, Fisk will operate as a wholly owned Tutor Perini unit, with existing senior managers remaining in place. Publicly owned Tutor Perini had $2.51 billion in revenue for the first nine months of 2010, down 38.3% from $4.07
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.