Photo Courtesy of Cummins Inc. Eight ft tall, five ft wide and 14 ft long, this diesel engine will power offshore drills and generator sets. Mining companies want giant haul trucks to carry 500 tons. Today's threshold is 400 tons, and the biggest limitation is the availability of massive tires and engines. Cummins has the second part covered: The company plans to build a new 4,000-horsepower diesel in Seymour, Ind., by 2015.The new QSK95 powerplant "moves Cummins into a significantly higher power class, and we know that many of our customers have been eagerly anticipating us making that move," says
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.