With the control of the House and possibly the Senate at stake, construction unions and industry groups say their members are highly engaged in the 2010 mid-term congressional elections and are on track to equal, if not exceed, their political contributions for 2006, the last mid-term election year. Photo: Wilfredo Lee/AP Florida Senator Charlie Crist is getting more construction dollars than any other candidate. Contributions from construction industry associations and companies reached $40.7 million as of Sept. 13, according to their filings with the Federal Election Commission, says the Center for Responsive Politics. Construction donors gave a little more than
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.