New Harrisburg Reservoir Dam
Significant HazardNot Available ConditionEmergency Action Plan: Yes
Location
| State | Illinois |
| County | Saline |
| Nearest City | GALATIA-OFFSTREAM |
| River/Stream | TRIB MIDDLE FORK SALINE RIVER |
| Coordinates | 37.83642, -88.59037 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 38 ft |
| Dam Height | 38 ft |
| Dam Length | 1,000 ft |
| Year Completed | 1955 (71 years old) |
Storage & Hydraulics
| NID Storage | 6,233 acre-ft |
| Max Storage | 6,233 acre-ft |
| Normal Storage | 2,050 acre-ft |
| Surface Area | 218 acres |
| Drainage Area | 6 sq mi |
| Max Discharge | 8,804 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Other |
| Owner | CITY OF HARRISBURG |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Not Available |
| Last Inspection | 05/09/2025 |
| Emergency Action Plan | Yes |