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 126–150 of 229
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Laurel Lake Dam Cumberland County | 19 | 1927 | Low | Poor |
| Lebanon Lake Dam Burlington County | 10 | 1956 | Significant | Poor |
| Liberty Lake Dam Warren County | 23 | — | Significant | Poor |
| Lionshead Lake Dam Passaic County | 27 | 1939 | High | Poor |
| Little Gloucester Dam Camden County | 20 | — | Significant | Poor |
| Longwood Lake Dam Morris County | 22 | 1898 | High | Poor |
| Lower Crandon Lake Dam Sussex County | 8 | — | Low | Poor |
| Lower Crest Lake Dam Passaic County | — | — | Significant | Poor |
| Ludlam Pond Dam Cape May County | 7 | — | Significant | Poor |
| Macopin Reservoir Dam Morris County | 34 | 1892 | High | Poor |
| Magnolia Lake Dam Cape May County | 8 | 1684 | Significant | Poor |
| Manahawkin Lake Dam Ocean County | 12 | 1929 | Significant | Poor |
| Manalapan Brook Pond Dam Monmouth County | 14 | 1924 | Significant | Poor |
| Maskells Mill Pond Dam Salem County | 13 | 1955 | Significant | Poor |
| Matawan Lake Dam Monmouth County | 20 | 1923 | High | Poor |
| Mcvicker'S Brook Dam Morris County | 32 | — | Significant | Poor |
| Memorial Park Dam Cumberland County | 8 | — | Significant | Poor |
| Memorial Park Pond Dam Somerset County | 8 | — | High | Poor |
| Mill Dam Burlington County | 15 | 1908 | Low | Poor |
| Mill Pond Dam Middlesex County | 8 | — | Low | Poor |
| Mine Hill Reservoir Dam Morris County | 30 | 1896 | Significant | Poor |
| Mohegan Trail Dam Bergen County | 10 | — | Low | Poor |
| Moose Pac Lake Dam Morris County | 10 | 1918 | Significant | Poor |
| Mountain Creek Lake Dam Sussex County | 12 | 1984 | High | Poor |
| Mt. Hope Pond Dam Morris County | 15 | 1930 | Significant | Poor |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.