The U.S. Green Building Council is defending its decision to uphold the highest certification to be granted a public high school under its green-building rating system, called Leadership in Energy and Environmental Design. The engineers who filed the challenge to the LEED-New Construction Gold certification on behalf of a group of taxpayers in Eagle River, Wis., say the decision to uphold the certification damages the credibility of USGBC. The consulting engineers were pro bono technical experts for the five people who filed the 125-page appeal on Dec. 23, 2008, when Northland Pines High School was two years old. Consulting engineers
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.