With the House nearing a critical health-care vote, construction is keeping a watchful eye on whether one controversial provision survives. That provision, sponsored by Sen. Jeff Merkley (D-Ore.), would require small contractors to provide health coverage or pay a penalty. The language is in the health-care bill the Senate passed. If the House does not remove the provision in an anticipated “corrections” measure, it could become law. House Speaker Pelosi is struggling to garner support for a ‘corrections’ bill. Merkley’s proposal has split the industry. Groups such as the Associated Builders and Contractors and Associated General Contractors want to see
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.