Inflation had its last hurrah during the first half of this year and it was quite impressive with both steel and oil prices soaring to record levels despite a subprime mortgage crisis that was destroying the housing industry. But then the Fat Lady sang and the full extent of the financial crisis started to reveal itself. With banks, insurance companies, Wall Street investment firms and the automotive industry all lining up for bailouts, commodity prices started to tumble. Oil prices fell from over $140 per barrel to less than $70. Steel prices also started to head down and economists expect
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.