Sen. Arlen Specter’s April 28 announcement that he has switched from the GOP to the Democratic Party will give Democrats a filibuster-proof 60-vote Senate majority, if Al Franken retains his tight lead in the unsettled Minnesota race. Specter, of Pennsylvania, will run as a Democrat in 2010. He was facing an uphill battle in the 2010 GOP primary against conservative Rep. Pat Toomey (R-Pa.). Specter says the Republican Party has shifted far to the right of where it was when he was elected in 1980. “I now find my political philosophy more in line with Democrats than Republicans,” he said.
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.