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 576–600 of 830
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Overflow Weir Dam Passaic County | 30 | 1928 | High | Satisfactory |
| Overpeck Tidal Dam Bergen County | 18 | 1950 | Low | Not Rated |
| Oxycocus East Dike #1 Ocean County | 12 | 1880 | Low | Not Rated |
| Pachoango Dam Burlington County | 12 | — | Low | Satisfactory |
| Packanack Lake Dam Passaic County | 15 | 1921 | High | Fair |
| Palatine Lake Dam Salem County | 8 | 1940 | Significant | Poor |
| Pancoast Mill Pond Dam Atlantic County | 11 | — | Low | Poor |
| Panther Valley Village # 6 Dam Warren County | 23 | — | Significant | Satisfactory |
| Parker Avenue Dam Ocean County | 10 | 1955 | High | Fair |
| Parsippany Dike Morris County | 30 | 1905 | High | Satisfactory |
| Parvin Lake Dam Salem County | 12 | 1925 | Significant | Poor |
| Patcong Lake Dam Atlantic County | 14 | 1984 | Low | Satisfactory |
| Paulina Lake Dam Warren County | 13 | 1895 | Significant | Poor |
| Paulinskill Lake Dam Sussex County | 29 | 1927 | Significant | Satisfactory |
| Paulins Kill Site 4 Dam Sussex County | 24 | 1961 | High | Satisfactory |
| Paulinskill Water Shed #2 Dam Sussex County | 29 | 1959 | High | Satisfactory |
| Peapack-Gladstone Res Dam Morris County | 26 | — | Low | Poor |
| Peddie Lake Dam Mercer County | 15 | 1923 | High | Satisfactory |
| Perona Lake #1 Dam Sussex County | 17 | 1929 | Low | Not Rated |
| Perona Lake #2 Dam Sussex County | 10 | — | Low | Not Rated |
| Perrineville Dam Monmouth County | 17 | — | Significant | Poor |
| Picatinny Lake Morris County | 15 | 1904 | High | Fair |
| Pickerel Pond Dam Ocean County | 7 | — | Low | Not Available |
| Pinecliff Lake Dam Passaic County | 15 | 1927 | High | Fair |
| Pine Lake Park Dam Ocean County | 16 | 1931 | Significant | Satisfactory |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.