New Jersey Dams
830 dams tracked by the National Inventory of Dams
Total Dams
830
High Hazard
232
28%
Poor / Unsatisfactory
233
Average Age
95 yrs
Hazard Classification
High232 (28.0%)
Significant332 (40.0%)
Low266 (32.0%)
Condition Assessment
Satisfactory373 (44.9%)
Fair112 (13.5%)
Poor / Unsatisfactory233 (28.1%)
Not Rated112 (13.5%)
Federal
21
State
126
Local
287
Private
393
Tallest Dams
- Merrill Creek Main Dam280 ft
- Round Valley South Dam178 ft
- Monksville Dam150 ft
- Round Valley North Dam135 ft
- Boonton Dam120 ft
High Hazard Dams
Poor Condition Dams
All Dams in New Jersey
Showing 51–75 of 229
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Rambaut Dam Bergen County | 11 | 1908 | Low | Poor |
| Ramapo Lake Dam Bergen County | 13 | — | High | Poor |
| Prospertown Dam Ocean County | 19 | 1966 | High | Poor |
| Powder Mill Pond Dam Morris County | 35 | — | High | Poor |
| Powder Mill Pond Dam Somerset County | 9 | — | Significant | Poor |
| Pleasant Valley Lake Dam Sussex County | 31 | — | High | Poor |
| Pleasant Mills Dam Atlantic County | 16 | — | Significant | Poor |
| Pine Mill Lake Dam Burlington County | 18 | — | Low | Poor |
| Perrineville Dam Monmouth County | 17 | — | Significant | Poor |
| Peapack-Gladstone Res Dam Morris County | 26 | — | Low | Poor |
| Paulina Lake Dam Warren County | 13 | 1895 | Significant | Poor |
| Parvin Lake Dam Salem County | 12 | 1925 | Significant | Poor |
| Pancoast Mill Pond Dam Atlantic County | 11 | — | Low | Poor |
| Palatine Lake Dam Salem County | 8 | 1940 | Significant | Poor |
| Oswego Dam Burlington County | 13 | 1936 | Significant | Poor |
| Osborns Mills Dam Monmouth County | 12 | — | Significant | Poor |
| Openaka Lake Dam Morris County | 20 | 1750 | Significant | Poor |
| Off'S Pond Dam Atlantic County | 8 | — | Significant | Poor |
| Oak Ridge Reservoir Dam Passaic County | 60 | 1892 | High | Poor |
| Nummytown Mill Pond Dam Cape May County | 9 | — | Significant | Poor |
| New Jersey No Name # 57 Dam Monmouth County | 17 | — | Low | Poor |
| New Jersey No Name # 40 Dam Passaic County | 15 | — | High | Poor |
| New Jersey No Name # 21 Dam Camden County | 7 | 1940 | Low | Poor |
| New Jersey No Name # 131 Dam Salem County | 9 | — | Significant | Poor |
| New Jersey No Name # 11 Dam Sussex County | 12 | 1957 | Significant | Poor |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.