Rail, marine and airport officials are pragmatically waiting for the final version of a stimulus bill. Everyone would like more stimulus project funds, but they would also like policy and programming changes. Such changes could be reflected in attempts to reauthorize the six-year transportation trust fund and the airport improvement program later this year. At a Transportation Research Board session held earlier this month in Washington, D.C., Maryland State Highway Administrator Neil Pedersen said many officials were calling the stimulus request process a “dress rehearsal” for reauthorization. Related Links: Proposal in House Fires Up Debate Does Massive Spending Help or
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.