Main Street Triangle Dam
Illinois — Cook County — MILL CREEK - OFFSTREAM
Location
| State | Illinois |
| County | Cook |
| River | MILL CREEK - OFFSTREAM |
| Coordinates | 41.63431, -87.85431 |
Physical Characteristics
| NID Height | 9 ft |
| Dam Height | 9 ft |
| Dam Length | 395 ft |
| NID Storage | 0 acre-ft |
| Max Storage | — |
| Surface Area | 1 acres |
Safety Classification
| Hazard Potential | Significant |
| Condition Assessment | Not Available |
| EAP Status | No |
| Last Inspection | October 29, 2025 |
| Inspection Frequency | 3 |
Dam Information
| Year Completed | — |
| Primary Purpose | Flood Risk Reduction |
| Dam Type | Concrete |
| Owner Type | Local Government |
| Owner | VILLAGE OF ORLAND PARK |
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.