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 326–350 of 373
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Tarkiln Pond Dam Cape May County | 7 | — | Significant | Satisfactory |
| Tennents Brook Dam Middlesex County | 9 | 1890 | Low | Satisfactory |
| Terrace Lake Dam Morris County | 7 | — | Significant | Satisfactory |
| Timber Lake Dam Burlington County | 19 | 1955 | High | Satisfactory |
| Timber Lakes Dam Gloucester County | 8 | — | Low | Satisfactory |
| Tomlinson Mill Dam Burlington County | 11 | — | Significant | Satisfactory |
| Union Mill Lake Dam Burlington County | 13 | — | Significant | Satisfactory |
| Untermeyer Dam Morris County | 23 | 1927 | High | Satisfactory |
| Upper Aetna Lake Dam Burlington County | 14 | 1928 | Significant | Satisfactory |
| Upper East Highland Lake Dam Sussex County | 15 | 1957 | Significant | Satisfactory |
| Upper Garden Reservoir Dam Morris County | 6 | — | Significant | Satisfactory |
| Upper Greenwood Lake Dam Passaic County | 20 | 1932 | High | Satisfactory |
| Upper Keswick Dam Ocean County | 12 | 1898 | Significant | Satisfactory |
| Upper Mohawk Lake Dam Sussex County | 16 | 1927 | High | Satisfactory |
| Upper Sylvan Lake Dam Burlington County | 20 | 1941 | Significant | Satisfactory |
| Upper West Highland Lake Dam Sussex County | 13 | 1958 | High | Satisfactory |
| Valle Estate At Chatham Dam Morris County | 7 | — | Significant | Satisfactory |
| Van Dorans Mill Dam Morris County | 18 | 1943 | Significant | Satisfactory |
| Vernon Valley Lake Dam Sussex County | 9 | — | Significant | Satisfactory |
| Verona Lake Dam Essex County | 13 | 1903 | High | Satisfactory |
| Veteran Memorial Lake Dam Salem County | 14 | 1922 | Low | Satisfactory |
| Vincentown Mill Dam Burlington County | 12 | 1891 | High | Satisfactory |
| Washington Forge Pond Dam Morris County | 10 | 1890 | Significant | Satisfactory |
| Washington Lake South Dam Bergen County | 10 | 1980 | Significant | Satisfactory |
| Washington Lake West Dam Bergen County | 10 | 1980 | Significant | Satisfactory |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.