Dropping demand for gasoline has taken a chunk out of last year’s super-high prices, and refiners are shifting capital expenditures accordingly. Prices for gasoline rose 7.1¢ on Jan. 5 to $1.68 per gallon but were still down 46% overall since a year ago, reports the federal Energy Information Administration. On-highway diesel prices fell 3.6¢, to $2.29, a 32% drop since 2008 and the lowest in years. Despite the winter price rollback for both fuels, diesel is “the growth fuel, globally,” says Allen Schaeffer, executive director of Washington, D.C.-based Diesel Technology Forum. As such, ExxonMobil Corp. and others are boosting output
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.