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 226–250 of 332
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| New Jersey No Name # 11 Dam Sussex County | 12 | 1957 | Significant | Poor |
| New Jersey No Name # 131 Dam Salem County | 9 | — | Significant | Poor |
| New Jersey No Name # 32 Dam Hunterdon County | 40 | — | Significant | Satisfactory |
| New Market Pond Dam Middlesex County | 7 | 1830 | Significant | Satisfactory |
| Newton Lake Dam Camden County | 10 | 1929 | Significant | Satisfactory |
| Northridge Pond Dam Somerset County | 13 | — | Significant | Satisfactory |
| Nosenzo Pond Dam Passaic County | 9 | 1927 | Significant | Satisfactory |
| Nummytown Mill Pond Dam Cape May County | 9 | — | Significant | Poor |
| Off'S Pond Dam Atlantic County | 8 | — | Significant | Poor |
| Old Mill Pond Dam Monmouth County | 15 | 1948 | Significant | Satisfactory |
| Old Morris Canal Dam Morris County | 18 | 1932 | Significant | Satisfactory |
| Openaka Lake Dam Morris County | 20 | 1750 | Significant | Poor |
| Osborn Mills Dam Somerset County | 15 | — | Significant | Satisfactory |
| Osborns Mills Dam Monmouth County | 12 | — | Significant | Poor |
| Oswego Dam Burlington County | 13 | 1936 | Significant | Poor |
| Palatine Lake Dam Salem County | 8 | 1940 | Significant | Poor |
| Panther Valley Village # 6 Dam Warren County | 23 | — | Significant | Satisfactory |
| Parvin Lake Dam Salem County | 12 | 1925 | Significant | Poor |
| Paulina Lake Dam Warren County | 13 | 1895 | Significant | Poor |
| Paulinskill Lake Dam Sussex County | 29 | 1927 | Significant | Satisfactory |
| Perrineville Dam Monmouth County | 17 | — | Significant | Poor |
| Pine Lake Park Dam Ocean County | 16 | 1931 | Significant | Satisfactory |
| Plainsboro Pond Dam Middlesex County | 11 | — | Significant | Satisfactory |
| Pleasant Mills Dam Atlantic County | 16 | — | Significant | Poor |
| Powder Mill Pond Dam Somerset County | 9 | — | Significant | Poor |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.