CHICAGO, April 7 /PRNewswire/ -- The Illinois Chamber of Commerce today released an economic impact analysis reporting that the economic value lost from permanent closure of the Chicago and O'Brien locks would be $582 million the first year, $531 million annually over the subsequent 7 years and would result in a net loss of $4.7 billion over a 20-year planning horizon. The report, conducted by DePaul University economist Dr.

By Judy Keen CHICAGO -- Debate about this city's airports has intensified since a Southwest Airlines jet skidded off a runway at Midway International Airport nine weeks ago, renewing questions about congestion and expansion and highlighting the role of politics in transportation planning.