The economy may be acting like a square, but the 82-story “Aqua” in Chicago is making waves with hipsters looking to live in style. Built by general contractor James McHugh Construction Co., the $475-million tower topped out on March 4 and is nearly sold out, says owner Magellan Development Group. The 2.2-million-sq-ft, 968-unit building is set to open in phases starting in May and finish up next year on time, on budget. It includes 264 condos, 476 rentals and hotel spaces, a mixed-use first for Chicago, says Magellan, which planned Aqua to bookend a $4-billion Lakeshore East urban village. Designed
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.