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 126–150 of 229
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Lake George Dam Atlantic County | 12 | 1959 | Low | Poor |
| Lake Garrison Dam Gloucester County | 7 | 1924 | Significant | Poor |
| Lake Estling Dam Morris County | 19 | 1870 | High | Poor |
| Lake Denmark Morris County | 12 | 1904 | High | Poor |
| Lake Conway Dam Sussex County | 21 | 1958 | High | Poor |
| Lake Arcadia Dam #2 Passaic County | 18 | 1926 | Significant | Poor |
| Lake Arcadia Dam #1 Passaic County | 22 | 1926 | High | Poor |
| Lake Ames Dam Morris County | 9 | 1934 | Significant | Poor |
| Lake Albert Dam Atlantic County | 9 | 1959 | Low | Poor |
| Lake Aeroflex Dam Sussex County | 15 | — | Low | Poor |
| Kirkwood Lake Dam Camden County | 13 | 1931 | Low | Poor |
| Kinnelon (Maple) Dam Morris County | 14 | 1928 | Significant | Poor |
| Killdeer Lake Dam Burlington County | 15 | — | Significant | Poor |
| Kenilworth Blvd. Dam Union County | 2 | — | Significant | Poor |
| Kenilworth #2 (Flamingo Road) Dam Burlington County | 8 | — | Low | Poor |
| Jutland Dam Hunterdon County | 24 | 1930 | Significant | Poor |
| J. Seward Johnson Dam Hunterdon County | 24 | 1967 | Low | Poor |
| Johnson Pond Dam Cape May County | 10 | 1759 | Significant | Poor |
| Jefferson Lake Dam Sussex County | 15 | — | Low | Poor |
| Jaqui Mill Dam Morris County | 27 | 1920 | High | Poor |
| Iona Lake Dam Gloucester County | 11 | — | Significant | Poor |
| Indian Dam Monmouth County | 17 | 1937 | Significant | Poor |
| Imlaystown Lake Dam Monmouth County | 20 | 1925 | Significant | Poor |
| Hurley Pond Dam Monmouth County | 6 | 1915 | Significant | Poor |
| Hopkins Lake Dam Camden County | 25 | — | Significant | Poor |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.