Marlu Lake Dam
Marlu Lake Dam is an earth dam located in Monmouth County, New Jersey, built in 1965. It carries a Low hazard potential classification and has a fair condition assessment.
About Marlu Lake Dam
The primary purpose of Marlu Lake Dam is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by County Of Monmouth Park System (local government). It impounds the Branch Of Hop Brook near Middletown.
The dam stands 29 feet tall and stretches 424 feet across, creates a reservoir covering 20 acres, has a storage capacity of 82 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 1965, the structure is well into its service life at over 50 years old.
This dam has a low hazard potential classification, meaning that failure would cause minimal damage, limited primarily to the dam owner's property, with no expected loss of life. Its condition is rated fair — the dam has minor deficiencies that are being addressed or do not pose an immediate safety threat. The most recent inspection on record was 07/18/2023.
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Location
| State | New Jersey |
| County | Monmouth |
| Nearest City | Middletown |
| River/Stream | Branch Of Hop Brook |
| Coordinates | 40.33412, -74.15453 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 29 ft |
| Dam Height | 29 ft |
| Dam Length | 424 ft |
| Year Completed | 1965 (61 years old) |
Storage & Hydraulics
| NID Storage | 82 acre-ft |
| Normal Storage | 82 acre-ft |
| Surface Area | 20 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 866 cfs |
Ownership & Safety
| Purpose | Irrigation |
| Owner | County of Monmouth Park System |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 07/18/2023 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | NJ00098 |
| Federal ID | NJ00098 |
| More Info | State Dam Safety Program |