Mcmillan Reservoir Dam is an earth dam located in Bergen County, New Jersey. It carries a Low hazard potential classification and has a fair condition assessment.
Dam profile
NID height · 21 ft21 ft tall and 265 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 Mcmillan Reservoir Dam
The primary purpose of Mcmillan Reservoir 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 Bergen Department of Parks (local government). It impounds the Ramapo River-tr.
The dam stands 21 feet tall and stretches 265 feet across, creates a reservoir covering 20 acres, has a storage capacity of 141 acre-feet, and collects water from a drainage area of 0 square miles.
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 08/18/2022.
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Location
| State | New Jersey |
| County | Bergen |
| River/Stream | Ramapo River-tr |
| Coordinates | 41.08345, -74.20182 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 21 ft |
| Dam Height | 21 ft |
| Dam Length | 265 ft |
Storage & Hydraulics
| NID Storage | 141 acre-ft |
| Normal Storage | 141 acre-ft |
| Surface Area | 20 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 408 cfs |
Ownership & Safety
| Purpose | Recreation |
| Owner | County of Bergen Department of Parks |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 08/18/2022 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | NJ00497 |
| Federal ID | NJ00497 |
| More Info | State Dam Safety Program |