KLICKITAT COUNTY, Wash. --Environmental groups are applauding what happened to the century-old Condit Dam in Washington on Wednesday. Demolition crews blew a big hole in the dam. The damn is being removed to help restore the habitat of the fish runs that are threatened in the Pacific Northwest. It is the second largest dam in U.S. history to be demolished. The dam generates enough electricity to power 7,000 homes, but the owner opted to tear it down instead of building expensive structures for fish traveling upstream.