Chicago Harbor Lock
| Chicago Harbor Lock | |
|---|---|
Aerial view of the lock in 2009 | |
| 41°53′18″N 87°36′23″W / 41.8884°N 87.6064°W | |
| Waterway | Chicago River |
| Country | United States |
| State | Illinois |
| County | Cook County |
| Maintained by | US Army Corps of Engineers |
| Operation | Hydraulic |
| First built | 1938 |
| Latest built | 2011 |
| Length | 600 ft (180 m) |
| Width | 80 ft (24 m) |
| Fall | 2 to 5 ft (0.61 to 1.52 m) |
| Above sea level | 582 ft (177 m) |
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.