National Petroleum Chemical Plant Lake Dam
Illinois — Douglas County — KASKASKIA RIVER-OFFSTREAM
Location
| State | Illinois |
| County | Douglas |
| River | KASKASKIA RIVER-OFFSTREAM |
| Coordinates | 39.80111, -88.36342 |
Physical Characteristics
| NID Height | 21 ft |
| Dam Height | 21 ft |
| Dam Length | 2,500 ft |
| NID Storage | 367 acre-ft |
| Max Storage | 367 acre-ft |
| Surface Area | — |
Safety Classification
| Hazard Potential | Significant |
| Condition Assessment | Not Available |
| EAP Status | No |
| Last Inspection | June 11, 2025 |
| Inspection Frequency | 3 |
Dam Information
| Year Completed | 1952 |
| Primary Purpose | Water Supply |
| Dam Type | Earth |
| Owner Type | Private |
| Owner | U. S. INDUSTRIAL CHEMICAL COMPANY |
| Other Name | National Petroleum Chemical Plant Lake |
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.