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 426–450 of 830
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Lake Tappan Dam Bergen County | 34 | 1966 | High | Satisfactory |
| Lake Tappan Dike Bergen County | 20 | — | Low | Not Rated |
| Lake Telemark Dam Morris County | 11 | 1924 | Significant | Satisfactory |
| Lake Topanemus Dam Monmouth County | 20 | 1915 | High | Fair |
| Lake Tranquility Dam Sussex County | 14 | 1932 | High | Satisfactory |
| 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 Washington Dam Passaic County | 11 | 1930 | Low | Unsatisfactory |
| Lake Wasigan Dam Warren County | 10 | — | Low | Satisfactory |
| Lake Windsor Dam Sussex County | 32 | 1959 | Low | Satisfactory |
| Lake Winona Dam Morris County | 15 | 1950 | High | Poor |
| Lambertville #2 Dam Hunterdon County | 17 | 1877 | High | Satisfactory |
| Laurel Lake Dam Cumberland County | 19 | 1927 | Low | Poor |
| Laurel Springs Dam Camden County | 30 | — | Low | Satisfactory |
| Layton'S Lake Dam Salem County | 19 | 1972 | Significant | Satisfactory |
| Lebanon Forest #1 Dam Burlington County | 10 | — | Significant | Satisfactory |
| Lebanon Lake Dam Burlington County | 10 | 1956 | Significant | Poor |
| Leddell'S Pond Dam Morris County | 12 | — | Significant | Satisfactory |
| Ledgewood Pond Dam Morris County | 7 | — | Significant | Satisfactory |
| Levine Reservoir Dam Passaic County | 10 | — | Significant | Fair |
| Liberty Lake Dam Warren County | 23 | — | Significant | Poor |
| Lily Lake Dam Atlantic County | 9 | 1910 | Low | Fair |
| Lindy'S Lake Dam Passaic County | 24 | — | High | Satisfactory |
| Lionshead Lake Dam Passaic County | 27 | 1939 | High | Poor |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.