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 251–275 of 373
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Gordon Lakes Dam Passaic County | 12 | — | High | Satisfactory |
| Glen Lake Dam Sussex County | 12 | 1922 | High | Satisfactory |
| Glendola Reservoir Dam Monmouth County | 65 | 1961 | High | Satisfactory |
| Furnace Road Dam Passaic County | 20 | 1928 | High | Satisfactory |
| Furnace Brook W.S. #2 Dam Warren County | 55 | 1971 | High | Satisfactory |
| Frenches Pond Dam Sussex County | 13 | 1850 | High | Satisfactory |
| Fox Lake Dam Morris County | 22 | 1926 | High | Satisfactory |
| Fox Hollow Lake Dam Sussex County | 12 | 1925 | Significant | Satisfactory |
| Forest Lake Dam Sussex County | 20 | 1951 | High | Satisfactory |
| Forest Hill Park Dam Passaic County | 22 | — | Significant | Satisfactory |
| Forest Drive Dam Ocean County | 10 | — | Significant | Satisfactory |
| Fayson Lakes (West) Dam Morris County | 15 | 1922 | Significant | Satisfactory |
| Fayson Lakes (South) Dam Morris County | 8 | 1938 | Significant | Satisfactory |
| Fayson Lakes (East) Dam Morris County | 17 | 1926 | Significant | Satisfactory |
| Ellsworth (Detention Pond) Dam Somerset County | 9 | — | Significant | Satisfactory |
| Echo Lake Upper Dam Union County | 17 | 1922 | Significant | Satisfactory |
| Echo Lake Dam Union County | 20 | 1930 | Significant | Satisfactory |
| Echo Lake Dam Monmouth County | 8 | — | High | Satisfactory |
| East Lake Dam Cumberland County | 17 | — | High | Satisfactory |
| East Highland Lake Dam Sussex County | 15 | 1947 | Significant | Satisfactory |
| East Branch Reservoir Dam Somerset County | 33 | 1905 | High | Satisfactory |
| Dundee Passaic County | 16 | 1854 | Low | Satisfactory |
| Doughty Pond Dam Atlantic County | 18 | 1914 | Significant | Satisfactory |
| Don Bosco Dam Sussex County | 25 | 1962 | Low | Satisfactory |
| Donald R. Wheeler (Surprise Lake) Dam Morris County | 22 | 1909 | High | Satisfactory |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.