Harrisburg-sahara Retention Impoundment Dam
Harrisburg-sahara Retention Impoundment Dam is an earth dam located in Saline County, Illinois, built in 2003. It carries a Significant hazard potential classification.
About Harrisburg-sahara Retention Impoundment Dam
The primary purpose of Harrisburg-sahara Retention Impoundment Dam is flood risk reduction. The dam is designed to control downstream flooding by temporarily storing excess water during storms and releasing it at a controlled rate. The dam is owned by City Of Harrisburg (local government). It impounds the Trib Pankey Branch near Harrisburg.
The dam stands 25 feet tall and stretches 1,200 feet across, creates a reservoir covering 70 acres, has a maximum storage capacity of 959 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 2003, the structure is relatively new.
This dam has a significant hazard potential classification, meaning that a failure could cause significant economic damage — flooding roads, bridges, or property downstream — but is not expected to result in loss of life. An emergency action plan is in place for this dam. The most recent inspection on record was 08/09/2024.
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Location
| State | Illinois |
| County | Saline |
| Nearest City | Harrisburg |
| River/Stream | Trib Pankey Branch |
| Coordinates | 37.70784, -88.57722 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 25 ft |
| Dam Height | 25 ft |
| Dam Length | 1,200 ft |
| Year Completed | 2003 (23 years old) |
Storage & Hydraulics
| NID Storage | 959 acre-ft |
| Max Storage | 959 acre-ft |
| Normal Storage | 465 acre-ft |
| Surface Area | 70 acres |
| Drainage Area | 0 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | CITY OF HARRISBURG |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Not Available |
| Last Inspection | 08/09/2024 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | IL50498 |
| Federal ID | IL50498 |
| More Info | State Dam Safety Program |