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 51–75 of 830
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Warren Mill Dam Hunterdon County | 38 | 1916 | High | Poor |
| Wallkill Lake Dam Sussex County | 15 | 1930 | Low | Fair |
| Wagush Levee Dam Burlington County | 8 | — | High | Fair |
| Wadsworth Lake Dam Gloucester County | 20 | 1926 | High | Poor |
| Waddill Lake Dam Ocean County | 13 | 1963 | Significant | Poor |
| Vincentown Mill Dam Burlington County | 12 | 1891 | High | Satisfactory |
| Village Dock Lake Dam Gloucester County | 7 | — | Low | Poor |
| Veteran Memorial Lake Dam Salem County | 14 | 1922 | Low | Satisfactory |
| Verona Lake Dam Essex County | 13 | 1903 | High | Satisfactory |
| Vernon Valley Lake Dam Sussex County | 9 | — | Significant | Satisfactory |
| Van Dorans Mill Dam Morris County | 18 | 1943 | Significant | Satisfactory |
| Valle Estate At Chatham Dam Morris County | 7 | — | Significant | Satisfactory |
| Valhalla Lake Dam Morris County | 18 | 1910 | High | Poor |
| Ursino Dam Union County | 13 | 1927 | Low | Not Rated |
| Upper West Highland Lake Dam Sussex County | 13 | 1958 | High | Satisfactory |
| Upper Waterloo Lake Dam Sussex County | 9 | — | Low | Poor |
| Upper Twin Lakes Dam Passaic County | 7 | — | Low | Poor |
| Upper Sylvan Lake Dam Burlington County | 20 | 1941 | Significant | Satisfactory |
| Upper Stokes Dam Burlington County | 11 | — | Significant | Poor |
| Upper Pond Dam Monmouth County | — | — | Significant | Fair |
| Upper Mount Glen Lake Dam Passaic County | 8 | 1927 | High | Poor |
| Upper Mohawk Lake Dam Sussex County | 16 | 1927 | High | Satisfactory |
| Upper Lummis Pond Dam Cumberland County | 8 | — | Low | Not Rated |
| Upper Keswick Dam Ocean County | 12 | 1898 | Significant | Satisfactory |
| Upper Highland Lake Dam Sussex County | 18 | 1940 | High | Fair |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.