The U.S. Environmental Protection Agency announced on May 8 that it would distribute $111.9 million in grants bolstered by funds from the American Recovery and Reinvestment Act to help communities clean up Brownfield sites. The grants include $37.3 million from the Recovery Act and $74.6 million from the EPA Brownfields general program. The grants will help to assess, clean up and redevelop abandoned, contaminated Brownfields—sites where expansion, redevelopment or reuse may be complicated by the presence or potential presence of a hazardous substance, pollutant or contaminant. The Small Business Liability Relief and Brownfields Revitalization Act of 2002 expanded the definition
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.