Gateway Medical Lake Dam
Illinois — Madison County — TRIB CAHOKIA CREEK
Location
| State | Illinois |
| County | Madison |
| River | TRIB CAHOKIA CREEK |
| Coordinates | 38.79869, -89.97288 |
Physical Characteristics
| NID Height | 31 ft |
| Dam Height | 31 ft |
| Dam Length | 230 ft |
| NID Storage | 27 acre-ft |
| Max Storage | 27 acre-ft |
| Surface Area | — |
Safety Classification
| Hazard Potential | High |
| Condition Assessment | Not Available |
| EAP Status | Yes |
| Last Inspection | July 11, 2025 |
| Inspection Frequency | 1 |
Dam Information
| Year Completed | 1939 |
| Primary Purpose | Recreation |
| Dam Type | Earth |
| Owner Type | Private |
| Owner | GRANITE CITY HOSPITAL CO., LLC |
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.