Photo courtesy of CDM Smith Special DeliveryCDM Smith and PC Construction are the design-build team on the $210-million Blue Plains advanced water treatment plant, including a new biosolids-processing main process train, for the District of Columbia Water and Sewer Authority. Related Links: Top 100 Design-Build/CM-at-Risk List Design-Build Institute of America Conference Design-Build Institute of America The prolonged recession hit the industry hard over the past few years. But for firms offering alternative project delivery, the recession took an additional toll. Many owners, seeing designers and contractors scrambling for work, decided to forego alternative project delivery in favor of hard-bid design-bid-build,
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.