Tall Pines Farm Dam is an earth dam located in Sussex County, New Jersey, built in 1957. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
Dam profile
NID height · 23 ft23 ft tall and 510 ft long. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic embankment section and the water level is illustrative.
About Tall Pines Farm Dam
The primary purpose of Tall Pines Farm Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by David G. Mattes (private). It impounds the Trout Brook near Middleville.
The dam stands 23 feet tall and stretches 510 feet across, creates a reservoir covering 9 acres, has a maximum storage capacity of 73 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1957, the structure is well into its service life at over 50 years 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 satisfactory, indicating no existing or potential dam safety deficiencies are recognized. An emergency action plan is in place for this dam. The most recent inspection on record was 10/01/2023.
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Location
| State | New Jersey |
| County | Sussex |
| Nearest City | Middleville |
| River/Stream | Trout Brook |
| Coordinates | 41.07427, -74.89313 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 23 ft |
| Dam Height | 23 ft |
| Dam Length | 510 ft |
| Year Completed | 1957 (69 years old) |
Storage & Hydraulics
| NID Storage | 73 acre-ft |
| Max Storage | 73 acre-ft |
| Normal Storage | 62 acre-ft |
| Surface Area | 9 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 55 cfs |
Ownership & Safety
| Purpose | Recreation |
| Owner | David G. Mattes |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 10/01/2023 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | NJ00532 |
| Federal ID | NJ00532 |
| More Info | State Dam Safety Program |