In the story “Indianapolis To Pick Tunneler for Key CSO Connector Project,” the name of the low bidder was incorrectly stated. It is the Shea/Kiewit joint venture.In the story “ENR Top 600 Specialty Contractors,” the name of MMC Corp's mechanical group should be MMC Contractors. Also, J.C. Cannistraro LLC's name was misspelled.
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.