Photo courtesy of Graycor Graycor recently completed work at Duke Energy's new clean-coal, integrated gasification combined-cycle powerplant in Edwardsport, Ind. Photo by Drew Reynolds "We're on a generational march," says Matthew Gray, Graycor president (left), shown with brother and Graycor CFO Steven Gray. "We're not a quarter-to-quarter or year-to-year firm." Related Links: ENR's Top 400 Contractors Looking Back: Graycor's Contracting Strategies For a construction firm best known for gritty industrial and power projects, the suburban Chicago-based Graycor Inc. is spending a lot of time these days presiding over tenant fit-outs—its own, as it happens.While the lingering slowdown has prompted flashier
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.