Chicago River and Harbor Controlling Works
Illinois — Cook County — Chicago
Location
| State | Illinois |
| County | Cook |
| River | Chicago |
| Coordinates | 41.88858, -87.60758 |
Physical Characteristics
| NID Height | 31 ft |
| Dam Height | 31 ft |
| Dam Length | 0 ft |
| NID Storage | 1,000,000 acre-ft |
| Max Storage | 1,000,000 acre-ft |
| Surface Area | 0 acres |
Safety Classification
| Hazard Potential | High |
| Condition Assessment | Not Available |
| EAP Status | Yes |
| Last Inspection | April 19, 2022 |
| Inspection Frequency | 5 |
Dam Information
| Year Completed | 1938 |
| Primary Purpose | Navigation |
| Dam Type | Other |
| Owner Type | Federal |
| Owner | USACE - Chicago District |
| Other Name | Chicago Lock |
Location Map
About This Dam Record
Dam safety data is maintained by the Army Corps of Engineers National Inventory of Dams (NID). High-hazard dams are those where failure could cause loss of life or major property damage downstream.