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 101–125 of 229
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Lake Denmark Morris County | 12 | 1904 | High | Poor |
| Lake Estling Dam Morris County | 19 | 1870 | High | Poor |
| Lake Garrison Dam Gloucester County | 7 | 1924 | Significant | Poor |
| Lake George Dam Atlantic County | 12 | 1959 | Low | Poor |
| Lake Grinnell Dam Sussex County | 12 | 1900 | Significant | Poor |
| Lake Hackney Dam Gloucester County | 11 | — | Significant | Poor |
| Lake Hopatcong Dam Morris County | 17 | 1925 | High | Poor |
| Lake Juliet Dam Morris County | 12 | 1919 | Significant | Poor |
| Lake Kalmia Dam Warren County | 8 | 1936 | Low | Poor |
| Lakeland Dam Camden County | 14 | 1929 | Significant | Poor |
| Lake Lefferts Dam Monmouth County | 16 | 1928 | High | Poor |
| Lake Lenape Dam Atlantic County | 29 | 1879 | High | Poor |
| Lake Lenore Dam Morris County | 12 | — | Low | Poor |
| Lake Oberst Dam Gloucester County | 9 | — | Significant | Poor |
| Lake Panorama Dam Sussex County | 20 | 1957 | Significant | Poor |
| Lake Panorama Dike Sussex County | 15 | 1987 | High | Poor |
| Lake Reality Dam Morris County | 14 | 1940 | Significant | Poor |
| Lake Saginaw Dam Sussex County | 16 | 1925 | Low | Poor |
| Lake Shawnee Dam Morris County | 9 | — | Significant | Poor |
| Lake Sycamore Dam Salem County | 13 | — | Low | Poor |
| Lake Tamarack Dam Bergen County | 11 | — | Low | Poor |
| Lake Valentine Dam Sussex County | 12 | — | Significant | Poor |
| Lake Vreeland Dam Bergen County | 20 | 1917 | High | Poor |
| Lake Wanda Dam Sussex County | 7 | — | Low | Poor |
| Lake Winona Dam Morris County | 15 | 1950 | High | Poor |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.