New Jersey No Name # 71 Dam is an earth dam located in Morris County, New Jersey, built in 1901. It carries a Low hazard potential classification and has a fair condition assessment.
Dam profile
NID height · 12 ft12 ft tall and 165 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 New Jersey No Name # 71 Dam
The primary purpose of New Jersey No Name # 71 Dam is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Estate of H.j. Koehler (private). It impounds the Rockaway River-tr near Powerville.
The dam stands 12 feet tall and stretches 165 feet across, creates a reservoir covering 17 acres, has a maximum storage capacity of 144 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 1901, the structure is over a century 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 07/19/2016. That was over 10 years ago.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | New Jersey |
| County | Morris |
| Nearest City | Powerville |
| River/Stream | Rockaway River-tr |
| Coordinates | 40.94878, -74.43258 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 12 ft |
| Dam Height | 12 ft |
| Dam Length | 165 ft |
| Year Completed | 1901 (125 years old) |
Storage & Hydraulics
| NID Storage | 144 acre-ft |
| Max Storage | 144 acre-ft |
| Normal Storage | 107 acre-ft |
| Surface Area | 17 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 9 cfs |
Ownership & Safety
| Purpose | Recreation |
| Owner | Estate of H.j. Koehler |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Fair |
| Last Inspection | 07/19/2016 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | NJ00726 |
| Federal ID | NJ00726 |
| More Info | State Dam Safety Program |