Las Vegas Monorail Co., private owner of a $650-million, 4.2-mile automated rail line connecting eight Las Vegas Strip resorts and the convention center, filed for Chapter 11 bankruptcy protection on January 13, one month after an announced $500-million expansion to McCarran International Airport. The dual-line system began operation on July 15, 2004. Granite Construction Co. Inc., Watsonville, Calif., and Bombardier built the monorail under a $354-million, fixed-price contract. Estimated to carry 40,000 passengers a day, the monorail ran into trouble when, on Sept. 1, a 20-in., 60-lb rubber steering tire broke off during transit. Officials replaced the wheel assemblies and
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.