Lake Shawnee Dam
Lake Shawnee Dam is an earth dam located in Morris County, New Jersey. It carries a Significant hazard potential classification and has a poor condition assessment.
About Lake Shawnee Dam
The primary purpose of Lake Shawnee Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Lake Shawnee Club (private). It impounds the Weldon Brook.
The dam stands 9 feet tall and stretches 150 feet across, creates a reservoir covering 79 acres, has a maximum storage capacity of 376 acre-feet, and collects water from a drainage area of 7 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 05/14/2024.
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Location
| State | New Jersey |
| County | Morris |
| River/Stream | Weldon Brook |
| Coordinates | 40.96982, -74.59715 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 9 ft |
| Dam Height | 9 ft |
| Dam Length | 150 ft |
Storage & Hydraulics
| NID Storage | 376 acre-ft |
| Max Storage | 376 acre-ft |
| Normal Storage | 184 acre-ft |
| Surface Area | 79 acres |
| Drainage Area | 7 sq mi |
| Max Discharge | 522 cfs |
Ownership & Safety
| Purpose | Recreation |
| Owner | Lake Shawnee Club |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Poor |
| Last Inspection | 05/14/2024 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | NJ00334 |
| Federal ID | NJ00334 |
| More Info | State Dam Safety Program |