Mt. Hope Pond Dam is an earth dam located in Morris County, New Jersey, built in 1930. It carries a Significant hazard potential classification and has a poor condition assessment.
Dam profile
NID height · 15 ft15 ft tall and 232 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 Mt. Hope Pond Dam
The primary purpose of Mt. Hope Pond 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 Rockaway (local government). It impounds the White Meadow Brook near Rockaway.
The dam stands 15 feet tall and stretches 232 feet across, creates a reservoir covering 20 acres, has a storage capacity of 180 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1930, the structure is well-established, with more than 75 years of service.
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 12/06/2024.
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Location
| State | New Jersey |
| County | Morris |
| Nearest City | Rockaway |
| River/Stream | White Meadow Brook |
| Coordinates | 40.92928, -74.54620 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 15 ft |
| Dam Height | 15 ft |
| Dam Length | 232 ft |
| Year Completed | 1930 (96 years old) |
Storage & Hydraulics
| NID Storage | 180 acre-ft |
| Normal Storage | 180 acre-ft |
| Surface Area | 20 acres |
| Drainage Area | 0 sq mi |
Ownership & Safety
| Purpose | Recreation |
| Owner | Township of Rockaway |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Poor |
| Last Inspection | 12/06/2024 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | NJ00750 |
| Federal ID | NJ00750 |
| More Info | State Dam Safety Program |