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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]
To reduce the impacts from flooding, the Chicago Harbor Lock was opened for the first time since it was constructed at the mouth of the river in the 1930s. Outside of Chicago, flash flooding occurred in urban areas and along creeks across large portions of the metropolitan area and rural areas to the west.
The 89-year-old dam was last inspected in 2021 and categorized as a “high hazard” dam, which means a failure is likely to result in the loss of at least one life, according to the U.S. Army ...
Predating the lock and dam was the Blue Island Lock, constructed at the eastern end of the Cal-Sag Channel in 1922. Nearly as soon as its completion, there was already lobbying by various industries along the waterway to expand the size of the lock, which measured 360 by 50 feet (110 m × 15 m).
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 ...
The partial failure of Minnesota’s Rapidan Dam sheds like on the almost 4,100 dams in the U.S. that are categorized at the same risk level and condition – or worse.
Rainfall amounts by September 10 were 200–330 mm (7.9–13.0 in) over a two-day period. Damage was unprecedented. Dam failure abounded with a total of 14 dams undermined and an addition 19 dams at risk during the event. Four major bridges failed. Thousands of acres of sugar beets, beans, potatoes, corn, and other vegetables were in ruin.