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 326–332 of 332
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Westons Arch Dam Middlesex County | 17 | 1919 | Significant | Fair |
| Westville-Almonesson Dam Gloucester County | 17 | — | Significant | Satisfactory |
| Willow Grove Dam Salem County | 10 | — | Significant | Fair |
| Wilson Lake Dam Gloucester County | 6 | 1933 | Significant | Satisfactory |
| Woodbury Creek Dam Gloucester County | 6 | 1961 | Significant | Satisfactory |
| Woolman Lake Dam Burlington County | 5 | — | Significant | Satisfactory |
| Yantacaw Brook Dam Essex County | 8 | — | Significant | Poor |
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Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.