A typical job for the Bocell brothers starts with a phone call. “Nothing else had worked. Figured we’d give it a shot,” says Stanley Wondolowski, manager at a Corpus Christi, Texas, condominium association, recalling the day he dialed the Bocell’s number. “Every time it rained, it was a swimming pool down there.” CGI Texas, Dallas, knew how to handle the leaky concrete parking structure. “They drilled holes in the concrete, shot this gel into it, and the leaks stopped. It was very successful,” says Wondolowski. Photos courtesy of Marshall Bocell The CGI Injection Pistol requires only a single hole to
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.