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 1–25 of 229
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Algonkin Dam Salem County | 14 | 1924 | Significant | Poor |
| Allamuchy Pond Dam Warren County | 13 | — | Significant | Poor |
| Almonesson Lake Dam Gloucester County | 24 | 1926 | Significant | Poor |
| Ancora Pond Dam Camden County | 8 | — | Significant | Poor |
| Arrowhead Lake Pond Dam Cumberland County | 15 | 1972 | Significant | Poor |
| Assunpink #18 Dam Monmouth County | 38 | — | High | Poor |
| Assunpink #4 Dam Monmouth County | 24 | — | High | Poor |
| Assunpink #8 Dam Mercer County | 20 | — | High | Poor |
| Atsion Lake Dam Burlington County | 19 | 1930 | High | Poor |
| Ballingers Mill Pond Dam Salem County | 18 | 1929 | Significant | Poor |
| Barbour Mill Dam Passaic County | 13 | 1890 | Significant | Poor |
| Batsto Lake Dam Burlington County | 12 | — | Significant | Poor |
| Beaver Dam Cumberland County | 11 | 1927 | Low | Poor |
| Beaver Lake Dam Camden County | 7 | — | Low | Poor |
| Bells Lake Dam Gloucester County | 22 | 1928 | Significant | Poor |
| Bethany Hole Dam Burlington County | 11 | — | Significant | Poor |
| Big Lebanon Lake Dam Gloucester County | 13 | 1941 | Significant | Poor |
| Birchwood Lake Dam Morris County | 20 | — | High | Poor |
| Bottom'S Lake Dam Camden County | 8 | 1938 | Significant | Poor |
| Braddock Lake Dam Atlantic County | 14 | — | Low | Poor |
| Braddocks Mill Dam Burlington County | 16 | 1790 | Significant | Poor |
| Briarwood Lake Dam Burlington County | 12 | — | Significant | Poor |
| Brisbane Lake Dam Monmouth County | 14 | — | Significant | Poor |
| Bubbling Springs Lower Pond Dam Passaic County | 8 | — | Significant | Poor |
| Bucks Mill Dam Monmouth County | 13 | 1950 | Significant | Poor |
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Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.