As BP begins to secure the Macondo well in the Gulf of Mexico, the oil and gas industry is preparing to enter a new era of regulation, likely giving birth to an oil-spill-response industry and the eventual re-engineering of rigs, platforms and wells. Photo: Courtesy U.S. Coast Guard Recent reports advocate stricter regulations and better response plans. Reports released this month by a joint task force and BP all point to the need for a fresh look at the way the industry operates in the Gulf of Mexico and responds to oil spills. In addition, a Sept. 8 report from
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.