The Environmental Protection Agency on March 12 announced that it will funnel $297 million in stimulus aid to three northwestern states, Alaska and tribal governments for clean water projects. The funds are the first installment of the American Recovery and Reinvestment Act funding to come from the EPA. The individual amounts directed to Alaska, Oregon, Washington and tribal governments will be delivered via existing programs: the Clean Water State Revolving Fund, the Drinking Water State Revolving Fund, and the Tribal clean Water & Drinking Water Set-Aside programs. Alaska will receive $43 million, Idaho will receive $39 million, Oregon will receive
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.