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 332
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Alcyon Lake Dam Gloucester County | 12 | 1943 | Significant | Satisfactory |
| Algonkin Dam Salem County | 14 | 1924 | Significant | Poor |
| Allamuchy Pond Dam Warren County | 13 | — | Significant | Poor |
| Alloway Lake Dam Salem County | 20 | 1949 | Significant | Satisfactory |
| Almonesson Lake Dam Gloucester County | 24 | 1926 | Significant | Poor |
| Amwell #2 Dam Hunterdon County | 19 | — | Significant | Satisfactory |
| Amwell No. 1 Dam Hunterdon County | 22 | — | Significant | Satisfactory |
| Amwell No. 3 Dam Hunterdon County | 26 | 1970 | Significant | Satisfactory |
| Ancora Pond Dam Camden County | 8 | — | Significant | Poor |
| Apshawa Auxiliary Dam Passaic County | 16 | — | Significant | Satisfactory |
| Apshawa Main Dam Passaic County | 22 | 1912 | Significant | Satisfactory |
| Arrowhead Lake Pond Dam Cumberland County | 15 | 1972 | Significant | Poor |
| Assunpink #19 Dam Monmouth County | 36 | — | Significant | Fair |
| Atco Lake Dam Camden County | 8 | — | Significant | Satisfactory |
| Ballingers Mill Pond Dam Salem County | 18 | 1929 | Significant | Poor |
| Barbour Mill Dam Passaic County | 13 | 1890 | Significant | Poor |
| Barbours Pond Dam Passaic County | 20 | 1888 | Significant | Fair |
| Bargaintown Mill Pond Dam Atlantic County | 10 | 1718 | Significant | Fair |
| Batsto Lake Dam Burlington County | 12 | — | Significant | Poor |
| Bayberry Street Dam Burlington County | — | — | Significant | Satisfactory |
| Bear Brook Dam Essex County | 20 | 1979 | Significant | Satisfactory |
| Bear Pond Dam A Sussex County | 16 | 1905 | Significant | Satisfactory |
| Bear Pond Dam B Sussex County | 10 | 1900 | Significant | Satisfactory |
| Bells Lake Dam Gloucester County | 22 | 1928 | Significant | Poor |
| Bennetts Mills Dam Ocean County | 23 | — | Significant | Satisfactory |
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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.