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 373
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Mountain Lake Dam Morris County | 15 | — | High | Satisfactory |
| Mountain Valley Park Dam Morris County | 10 | 1950 | Significant | Satisfactory |
| Mount Hope Lake Dam Morris County | 18 | 1944 | High | Satisfactory |
| Mount Paul Dam Morris County | 26 | 1918 | High | Satisfactory |
| Mt. Kemble Lake Dam Morris County | 36 | 1928 | Significant | Satisfactory |
| Mullica Hill Pond Dam Gloucester County | 19 | 1922 | Significant | Satisfactory |
| Narraticon Lake Dam Gloucester County | 20 | 1934 | Significant | Satisfactory |
| New Jersey No Name # 109 Dam Monmouth County | 8 | 1950 | Low | Satisfactory |
| New Jersey No Name # 113 Dam Ocean County | 10 | 1965 | Significant | Satisfactory |
| New Jersey No Name #31 Dam Hunterdon County | 23 | — | High | Satisfactory |
| New Jersey No Name # 32 Dam Hunterdon County | 40 | — | Significant | Satisfactory |
| New Jersey No Name # 56 Dam Morris County | 7 | 1960 | Low | Satisfactory |
| New Jersey No Name # 84 Dam Burlington County | 15 | — | Low | Satisfactory |
| New Jersey No Name # 8 Dam Burlington County | 8 | — | Low | 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 |
| Old Forge Lake Dam Burlington County | 12 | — | Low | Satisfactory |
| Oldham Pond Dam Passaic County | 18 | 1849 | High | Satisfactory |
| Old Mill Pond Dam Monmouth County | 15 | 1948 | Significant | Satisfactory |
| Old Morris Canal Dam Morris County | 18 | 1932 | Significant | Satisfactory |
| Oliphants Mill Lake Dam Burlington County | 11 | — | Low | Satisfactory |
| Osborn Mills Dam Somerset County | 15 | — | Significant | Satisfactory |
| Overflow Weir Dam Passaic County | 30 | 1928 | High | Satisfactory |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.