Photo by Jeff Rubenstone for ENR The 336EH has the same profile as the non-hybrid model but boasts superior fuel consumption. Related Links: Caterpillar's Hybrid Excavator Pays Back in One Year California Offers Money To Buy Hybrid Machines As a slowdown in mining sales softens its bottom line, equipment giant Caterpillar Inc. is hoping construction customers will be drawn to the promised fuel savings in its new 336EH hybrid excavator.Earlier this month, ENR visited the company's demonstration center in Edwards, Ill., to see the machine up close. Announced last year, the new machine is based on the design of 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.