Schools and defense were on the agenda on Capitol Hill this week, with the final spending levels far from settled. The House passed a bill on May 14 that would authorize $6.4 billion for green school renovation and modernization projects for fiscal 2010. The bill passed 275-155, largely along party lines. The bill stipulates that funds be used for projects that meet green building standards or equivalent state or local standards. The bill also requires that in 2015—the final year of funding—districts use 100% of the funds they receive for green projects. One of the bill’s key sponsors, Rep. George
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.