Chicago Harbor Lock
Chicago River, Illinois
Located on Lake Michigan, at the mouth of the Chicago River, the Chicago Harbor Lock serves as a gateway to one of the nation's busiest commercial and recreational waterways. Over 50,000 vessels, 900,000 passengers, and 200,000 tons of cargo pass through its gates annually. The lock is operated by the OMNI Corporation via contract with the U.S. Army Corps of Engineers. It is open for navigation 24 hours per day, 7 days per week throughout the entire year.