Amid political and environmental conflicts over Texas air quality, International Power announced on June 14 a long-awaited powerplant expansion in south Texas. Barring intercession by the courts, the Coleto Creek Unit Two project is expected to ramp up next year, creating more than 1,000 construction jobs by 2015, when it is scheduled to come online. Rendering: International Power To some, the Coleto powerplant means more power and jobs; however, to others—including the Lone Star chapter of the Sierra Club—it just means more dirty air. The $1.4-billion expansion project will add a 650-MW coal-burning powerplant to International Power’s existing Coleto Unit
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.