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 201–225 of 229
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Spruce Run Reservoir Dam Hunterdon County | 93 | 1964 | High | Poor |
| Stephen Lake Dam Atlantic County | 9 | — | Significant | Poor |
| Stewart Dam Sussex County | 14 | 1965 | Significant | Poor |
| Stiers Pond Dam Warren County | 34 | — | Significant | Poor |
| St. Mary'S Abbey Lower Dam Morris County | 13 | — | Significant | Poor |
| Stokes-Lower Dam Burlington County | 8 | — | Significant | Poor |
| Stony Brook Water Shed #7 (Hunt Lake) Dam Mercer County | 28 | 1959 | High | Poor |
| Stony Brook W.S. Site 11 (Amwell) Dam Hunterdon County | 22 | 1963 | Significant | Poor |
| Stump Pond Dam Sussex County | 25 | — | High | Poor |
| Sunset Lake Dam Morris County | 8 | 1914 | High | Poor |
| Thundergut Pond Dam Salem County | 13 | 1955 | Low | Poor |
| Union Lake Dam Cumberland County | 35 | 1869 | High | Poor |
| Upper Crest Lake Dam Passaic County | — | — | Significant | Poor |
| Upper Mount Glen Lake Dam Passaic County | 8 | 1927 | High | Poor |
| Upper Stokes Dam Burlington County | 11 | — | Significant | Poor |
| Upper Twin Lakes Dam Passaic County | 7 | — | Low | Poor |
| Upper Waterloo Lake Dam Sussex County | 9 | — | Low | Poor |
| Valhalla Lake Dam Morris County | 18 | 1910 | High | Poor |
| Village Dock Lake Dam Gloucester County | 7 | — | Low | Poor |
| Waddill Lake Dam Ocean County | 13 | 1963 | Significant | Poor |
| Wadsworth Lake Dam Gloucester County | 20 | 1926 | High | Poor |
| Warren Mill Dam Hunterdon County | 38 | 1916 | High | Poor |
| Watson'S Lake Dam Camden County | 15 | — | Significant | Poor |
| West Branch Reservoir Dam Somerset County | 39 | 1930 | High | Poor |
| West Milford Lake Dam Passaic County | 16 | 1929 | High | Poor |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.