Manalapan Brook Pond Dam
Manalapan Brook Pond Dam is an earth dam located in Monmouth County, New Jersey, built in 1924. It carries a Significant hazard potential classification and has a poor condition assessment.
About Manalapan Brook Pond Dam
The primary purpose of Manalapan Brook Pond Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by County Of Monmouth Park System (local government). It impounds the Manalapan Brook near Manalapan.
The dam stands 14 feet tall and stretches 225 feet across, creates a reservoir covering 7 acres, has a storage capacity of 61 acre-feet, and collects water from a drainage area of 2 square miles. Completed in 1924, the structure is over a century old.
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 07/25/2023.
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Location
| State | New Jersey |
| County | Monmouth |
| Nearest City | Manalapan |
| River/Stream | Manalapan Brook |
| Coordinates | 40.21928, -74.36140 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 14 ft |
| Dam Height | 14 ft |
| Dam Length | 225 ft |
| Year Completed | 1924 (102 years old) |
Storage & Hydraulics
| NID Storage | 61 acre-ft |
| Normal Storage | 61 acre-ft |
| Surface Area | 7 acres |
| Drainage Area | 2 sq mi |
| Max Discharge | 213 cfs |
Ownership & Safety
| Purpose | Recreation |
| Owner | County of Monmouth Park System |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Poor |
| Last Inspection | 07/25/2023 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | NJ00588 |
| Federal ID | NJ00588 |
| More Info | State Dam Safety Program |