Even before completion, the new National Enrichment Facility is being expanded. Parsons Corp., Pasadena, Calif., was awarded a two-year contract to provide engineering, construction and construction management to expand Louisiana Energy Services’ $3-billion uranium-enrichment facility in Eunice, N.M. The plant is one of three now being built in the U.S. to enrich uranium fuel for nuclear powerplants using energy-efficient gas-centrifuge technology instead of gaseous-diffusion technology.
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.