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 26–50 of 112
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Shackamaxon Dam Union County | 24 | — | High | Fair |
| Sallys Pond Dam Passaic County | 15 | — | High | Fair |
| Saffin Pond Dam Morris County | 24 | 1930 | Significant | Fair |
| Sadies Dam Salem County | 14 | 1956 | Significant | Fair |
| Route 88 Dam Ocean County | 7 | — | Significant | Fair |
| Rainbow Lakes Dam Morris County | 11 | — | High | Fair |
| Rainbow Lake Dam Salem County | 20 | 1774 | Significant | Fair |
| Pompton Dam Passaic County | 22 | — | Low | Fair |
| Pinecliff Lake Dam Passaic County | 15 | 1927 | High | Fair |
| Picatinny Lake Morris County | 15 | 1904 | High | Fair |
| Parker Avenue Dam Ocean County | 10 | 1955 | High | Fair |
| Packanack Lake Dam Passaic County | 15 | 1921 | High | Fair |
| Orange Reservoir Dam Essex County | 34 | 1958 | High | Fair |
| Oradell Reservoir Dam Bergen County | 25 | 1922 | High | Fair |
| Oakford Lake Dam Ocean County | 8 | 1929 | Low | Fair |
| Nishisakawick Creek Dam Hunterdon County | 23 | 1930 | Low | Fair |
| New Street Reservoir Dam Passaic County | 26 | 1925 | High | Fair |
| New Jersey No Name # 71 Dam Morris County | 12 | 1901 | Low | Fair |
| New Camp Site Dam Camden County | 15 | 1946 | Low | Fair |
| Munson Dam Salem County | 32 | 1934 | Low | Fair |
| Moorestown Dam Burlington County | 8 | 1939 | Low | Fair |
| Mill Pond Dam Bergen County | 21 | 1908 | High | Fair |
| Mcmillan Reservoir Dam Bergen County | 21 | — | Low | Fair |
| Marlu Lake Dam Monmouth County | 29 | 1965 | Low | Fair |
| Malaga Dam Gloucester County | 22 | — | Significant | Fair |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.