Heavy-equipment costs are rising this year due to increasing demand and higher prices for raw materials, such as engines, fuel and rubber. U.S. diesel fuel prices shot up to nearly $4 per gallon in early April, an 32% annual increase, according to the U.S. Energy Information Administration. Yokohama Tire Corp. cites rubber cost inflation for its coming 10% price hike for off-road tires. Overall prices for new construction machinery in February increased 2% over the same month last year, according to the Bureau of Labor Statistics, while monthly prices for used equipment sold at auctions shot up dramatically over prior
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.