Over the past year, ENR has tested and reviewed the all-new 2010 Ram Heavy Duty, the 2011 Ford Super Duty and the 2011 Chevrolet Silverado HD/GMC Sierra HD, but our friends at PickupTrucks.com have taken evaluating these workhorses to another level. Photo: Courtesy of Pickuptrucks.com The Ram 3500 and Ford F-350 heavy-duty pickups tackle a 16% grade with 12,000 lb in tow at General Motors’ Milford proving grounds, near Detroit, during the 2010 Heavy-Duty Shoot-Out. Photo: Ford Motor Co. While GM outperformed Ford in the diesel class, Ford’s Super Duty was evaluated as being the best overall heavy-duty pickup for
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.