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 266
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Tinton Manor Dam Monmouth County | 13 | — | Low | Not Rated |
| Timber Lakes Dam Gloucester County | 8 | — | Low | Satisfactory |
| Thundergut Pond Dam Salem County | 13 | 1955 | Low | Poor |
| Thomas Rich Dam Sussex County | 13 | 1926 | Low | Not Rated |
| Tennents Brook Dam Middlesex County | 9 | 1890 | Low | Satisfactory |
| Swartswood Lake Dam Sussex County | 16 | 1903 | Low | Fair |
| Surprise Lake Dam Union County | 20 | 1928 | Low | Satisfactory |
| Sunset Lake Raceway Dam Cumberland County | 11 | 1949 | Low | Satisfactory |
| Sunset Lake Dam Sussex County | 13 | 1925 | Low | Satisfactory |
| Success Lake Dam Ocean County | 11 | — | Low | Not Rated |
| Stony Lake Dam Sussex County | 17 | 1926 | Low | Fair |
| Stony Brook W.S. # 5 (Baldwin) Dam Mercer County | 14 | — | Low | Fair |
| Stony Brook #4 (Curlis Lake) Dam Mercer County | 24 | 1959 | Low | Satisfactory |
| Stony Brook #3 (Rosedale Lake) Dam Mercer County | 28 | — | Low | Satisfactory |
| Stony Brook #2 (Willow Lake) Dam Mercer County | 15 | 1959 | Low | Satisfactory |
| Stockton College Upper Dam #1 Atlantic County | 8 | — | Low | Not Rated |
| Stickle Pond Dam Morris County | 17 | — | Low | Not Rated |
| Stag Pond Dam Sussex County | 8 | — | Low | Satisfactory |
| Stabilization/Leveling Pond Dam Monmouth County | 10 | 1975 | Low | Satisfactory |
| Squibb Dam Mercer County | 26 | — | Low | Satisfactory |
| Spruce Run Flow Measuring Weir Dam Hunterdon County | 9 | 1960 | Low | Poor |
| Spruce Lake Dam Gloucester County | 9 | — | Low | Satisfactory |
| Slabtown Lake Dam Salem County | 10 | 1926 | Low | Poor |
| Skip Morgan Drive Dam Atlantic County | 12 | — | Low | Poor |
| Silver Lake Dam Sussex County | 11 | — | Low | Poor |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.