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 301–325 of 373
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Smoyer Park Dam Mercer County | 15 | — | Significant | Satisfactory |
| South Barry Lake Dike Sussex County | 6 | — | Significant | Satisfactory |
| Speedwell Dam Morris County | 14 | 1939 | High | Satisfactory |
| Split Rock Pond Dam Morris County | 39 | 1948 | High | Satisfactory |
| Spruce Lake Dam Gloucester County | 9 | — | Low | Satisfactory |
| Squibb Dam Mercer County | 26 | — | Low | Satisfactory |
| Stabilization/Leveling Pond Dam Monmouth County | 10 | 1975 | Low | Satisfactory |
| Stag Pond Dam Sussex County | 8 | — | Low | Satisfactory |
| Star Lake Upper Dam Passaic County | 11 | 1900 | High | Satisfactory |
| Stony Brook #14 (Honey Lake) Dam Mercer County | 18 | 1964 | High | Satisfactory |
| Stony Brook #2 (Willow Lake) Dam Mercer County | 15 | 1959 | Low | Satisfactory |
| Stony Brook #3 (Rosedale Lake) Dam Mercer County | 28 | — | Low | Satisfactory |
| Stony Brook #4 (Curlis Lake) Dam Mercer County | 24 | 1959 | Low | Satisfactory |
| Summit Lake Dam Sussex County | 5 | — | Significant | Satisfactory |
| Sunrise Lake Dam Morris County | 18 | 1930 | Significant | Satisfactory |
| Sunset Lake Dam Gloucester County | 8 | 1950 | Significant | Satisfactory |
| Sunset Lake Dam Sussex County | 13 | 1925 | Low | Satisfactory |
| Sunset Lake Raceway Dam Cumberland County | 11 | 1949 | Low | Satisfactory |
| Sunshine Lake Dam Camden County | 10 | — | Significant | Satisfactory |
| Surprise Lake Dam Union County | 20 | 1928 | Low | Satisfactory |
| Swannanoa Lake #1 (South) Dam Morris County | 15 | 1914 | High | Satisfactory |
| Swannanoa Lake #2 (North) Dam Morris County | 11 | 1914 | High | Satisfactory |
| Swimming River Reservoir Dam Monmouth County | 45 | 1901 | High | Satisfactory |
| Sylvan Lake Dam Burlington County | 18 | 1941 | High | Satisfactory |
| Tall Pines Farm Dam Sussex County | 23 | 1957 | Significant | Satisfactory |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.