Iona Lake Dam
Iona Lake Dam is an earth dam located in Gloucester County, New Jersey. It carries a Significant hazard potential classification and has a poor condition assessment.
About Iona Lake Dam
The primary purpose of Iona Lake Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Township Of Franklin (local government). It impounds the Still Run.
The dam stands 11 feet tall and stretches 800 feet across, creates a reservoir covering 60 acres, has a storage capacity of 108 acre-feet, and collects water from a drainage area of 26 square miles.
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. Its condition is rated poor, meaning the dam has recognized safety deficiencies that require remediation to address risks. An emergency action plan is in place for this dam. The most recent inspection on record was 05/10/2023.
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Location
| State | New Jersey |
| County | Gloucester |
| River/Stream | Still Run |
| Coordinates | 39.59487, -75.08180 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 11 ft |
| Dam Height | 11 ft |
| Dam Length | 800 ft |
Storage & Hydraulics
| NID Storage | 108 acre-ft |
| Normal Storage | 108 acre-ft |
| Surface Area | 60 acres |
| Drainage Area | 26 sq mi |
| Max Discharge | 1,248 cfs |
Ownership & Safety
| Purpose | Recreation |
| Owner | Township of Franklin |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Poor |
| Last Inspection | 05/10/2023 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | NJ00030 |
| Federal ID | NJ00030 |
| More Info | State Dam Safety Program |