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 276–300 of 373
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Regional Stormwater Detention Basin G Dam Mercer County | 18 | 1989 | Significant | Satisfactory |
| Reservoir Lake Dam Sussex County | 12 | — | High | Satisfactory |
| Rickabear Dam Morris County | 22 | 1954 | Significant | Satisfactory |
| Riverton Country Club Dam Burlington County | 6 | — | Significant | Satisfactory |
| Robert Rooke Dam Sussex County | 23 | 1963 | High | Satisfactory |
| Robinson'S Branch Reservoir Dam Union County | 27 | 1907 | High | Satisfactory |
| Rocco Bunlno Dam Bergen County | 19 | 1956 | Significant | Satisfactory |
| Rockaway Townsquare Mall Dam Morris County | 17 | — | Significant | Satisfactory |
| Rock Lodge Pond Dam Sussex County | 15 | 1907 | Significant | Satisfactory |
| Roosevelt Park Dam Middlesex County | 8 | — | Significant | Satisfactory |
| Saipe Lake Dam Burlington County | 7 | — | Significant | Satisfactory |
| Scotch Road Detention Dam 1.2 Mercer County | 12 | — | Significant | Satisfactory |
| Seeley'S Pond Dam Union County | 20 | 1928 | Significant | Satisfactory |
| Seneca Lake Dam Sussex County | 11 | — | Significant | Satisfactory |
| Shadow Lake Dam Bergen County | 16 | 1928 | Significant | Satisfactory |
| Shay Lake Dam Sussex County | 24 | — | Low | Satisfactory |
| Shepherd Lake Dam Passaic County | 18 | — | Low | Satisfactory |
| Sheppards Mill Pond Dam Cumberland County | 18 | 1885 | Low | Satisfactory |
| Shongum Lake Dam Morris County | 12 | 1923 | High | Satisfactory |
| Silver Lake Dam Middlesex County | 31 | 1923 | Low | Satisfactory |
| Sioux Lake Dam Burlington County | 12 | — | Significant | Satisfactory |
| Skyline Lake #1 (Lower) Dam Passaic County | 16 | 1947 | High | Satisfactory |
| Skyline Lake #2 (Upper) Dam Passaic County | 24 | 1946 | High | Satisfactory |
| Sleepy Valley Dam Sussex County | 13 | 1937 | Significant | Satisfactory |
| Smithville Dam Burlington County | 10 | 1935 | High | Satisfactory |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.