TOP PHOTO: Komatsu America Corp., BOTTOM PHOTO: Milwaukee Electric Tool Corp. How Green? Komatsus hybrid excavator, which the firm says is 25% more fuel efficient than the standard model, is one of two machines to be tested. If you are working out West and have been thinking about trying a hybrid construction machine, now is the time to take advantage of nearly $1 million in incentives available from the University of California, Riverside. The catch? Your new machine could take part in a statewide study designed to find out how “green” hybrids really are.Working under a $2-million grant from the
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.