As the House and Senate head for the end of their lame-duck session, must-pass tax and appropriations bills are advancing. The final versions of both measures will have a major impact on construction. An $858-billion tax bill on Dec. 14 was sent to the Senate for final passage. The bill extends 2001 and 2003 individual rates, offers alternative-minimum-tax protection for many and cuts employees’ Social Security payroll taxes to 4.2%, from 6.2% for one year. Those provisions would help small design and construction firms taxed at individual rates as partnerships or S Corporations. Family-owned firms would get a boost from
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.