Groundbreaking took place this week for the $452-million Lodi Energy Cen-ter powerplant project in northern San Joaquin County. The California Energy Commission and Northern California Power Agency teamed up to get the project off the ground; the NCPA will construct, own and operate the plant. The center will be a natural-gas-fired, combined-cycle 255-MW power generation facility. Completion is scheduled for June 2012. A major component of the center will be a new technology: Designed to allow for the steam turbine’s earlier startup in a process that decouples the gas turbine from the heat-recovery steam generator, the technology is intended to
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.