The North American unit of U.K.-based BP will spend more than $161 million to resolve clean-air violations at its Texas City, Texas, refinery. It is the same plant for which BP was fined $50 million following a 2005 explosion that killed 15 contractor employees and injured 170 others. Under a new Feb. 19 settlement, BP agreed to invest most of the funds on pollution controls, maintenance and "improved internal management" at the plant. The pact with federal regulators, which also includes a $12-million civil penalty and $6 million to reduce air pollution from diesel vehicles, resolves BP’s noncompliance with a
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.