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The Chicago Harbor Lock, also known as the Chicago River & Harbor Controlling Works, is a stop lock and dam located within the Chicago Harbor in Chicago, Illinois at the mouth of the Chicago River. It is a component of the Chicago Area Waterway System, and is used to control water diversion from Lake Michigan into the river and for navigation.
There are three major locks within the CAWS, operated by the Army Corps of Engineers: the Chicago Harbor Lock, the Lockport Lock & Dam, and the T.J. O'Brien Lock and Dam. [4] Artificial waterways connecting the Mississippi and Great Lakes systems via the Chicago area, over the Chicago Portage, began with the I&M Canal in 1848. [5]
The lock and dam are 326 river miles (525 km) from the Mississippi-Illinois confluence.The lock chamber measures 1,000 by 110 feet (305 m × 34 m) with a maximum lift capability of 5 feet (1.5 m).
The project costs more than $1.1 billion, which many say is a small price to protect the multi-billion dollar fishing and recreation industries.
T. J. O’Brien Lock and Dam on the Calumet River, part of the Illinois Waterway. A series of eight locks, managed by the Army Corps of Engineers, controls water flow from Lake Michigan to the Mississippi River system. The upper lock, T.J. O'Brien, is 7 miles from Lake Michigan on the Calumet River and the last lock is 90 miles (140 km ...
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The main entrance to this harbor is marked by the Chicago Harbor Lighthouse. The Jardine Water Purification Plant, Navy Pier, the Chicago Harbor Lock, Coast Guard Station Chicago, two municipal harbors (DuSable Harbor and Monroe Harbor), the Chicago Yacht Club, and the Columbia Yacht Club are all located here. [2]
The lock will be closed from 5 p.m. on Sept. 29 until May 17, 2025. ... In 2023, the DNR received a $3 million grant from the Federal Land and Conservation Fund to help improve the lock and dam ...