The Obama administration has filed a lawsuit against 10 companies and two municipalities to ensure the continued cleanup of Wisconsin’s Lower Fox River and Green Bay Superfund site. The lawsuit, filed jointly by the U.S. government and the state of Wisconsin on Oct. 14, also seeks payment of associated government costs and natural resources damages. All told, the total cleanup costs and damages are expected to exceed $1 billion. Related Links: Veteran Waste-Cleanup Expert Applies Just-In-Time Methods to World’s Largest PCB Project to Date Work continues at the Lower Fox River/Green Bay Site,, which was contaminated with approximately 250,000 lbs
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.