The California legislature last week approved a series of bills designed to address water issues facing the state, including an $11.4-billion bond that will leverage another $30 billion if passed by voters next November. The $40-billion plan targets the San Joaquin-Sacramento Delta and its system of levees. It includes the creation of a new seven-member oversight body, the Delta Stewardship Council, to develop a comprehensive delta management plan by Jan. 1, 2012; the establishing of a groundwater monitoring program; reporting requirements for water diversions and imposition of civil liabilities and penalties for false statements; and a requirement for the state
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.