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 112
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Assunpink #19 Dam Monmouth County | 36 | — | Significant | Fair |
| Bamber Lake Dam Ocean County | 12 | — | Low | Fair |
| Barbours Pond Dam Passaic County | 20 | 1888 | Significant | Fair |
| Bargaintown Mill Pond Dam Atlantic County | 10 | 1718 | Significant | Fair |
| Barnegat Lake Dam Ocean County | 18 | 1937 | High | Fair |
| Barry Lakes #1 Dam Sussex County | 8 | 1955 | Low | Fair |
| Bayway Refinery No. 2 Dam Union County | 12 | — | Low | Fair |
| Big Look Trail Dam Burlington County | 10 | — | Significant | Fair |
| Blair Lake Dam Warren County | 18 | 1903 | High | Fair |
| Brewster Dam Bergen County | 13 | 1949 | Significant | Fair |
| Burnt Mill Pond Dam Cumberland County | 9 | — | Significant | Fair |
| Butterfly Bogs Dam Ocean County | 8 | — | Significant | Fair |
| Canistear Reservoir #1 Dam Sussex County | 70 | 1896 | High | Fair |
| Canistear Reservoir #2 Dam Sussex County | 44 | 1896 | High | Fair |
| Cedar Grove North Res Dam Passaic County | 51 | 1903 | High | Fair |
| Cedar Grove West Res Dam Essex County | 55 | 1903 | High | Fair |
| Cedar Lake Dam Camden County | 13 | 1941 | Significant | Fair |
| Clearwater Detention Dam Union County | 22 | 1994 | High | Fair |
| Cliffwood Lake Dike Sussex County | 20 | — | Low | Fair |
| Clinton Reservoir Dam Passaic County | 56 | 1894 | High | Fair |
| Clove Lake Dam Sussex County | 11 | — | Low | Fair |
| Clove River Dam Sussex County | 28 | 1932 | High | Fair |
| Clyde Potts Reservoir Dam Morris County | 80 | 1932 | High | Fair |
| Colonial Lake Dam Mercer County | 12 | 1925 | Low | Fair |
| Coxhat Pond Dam Salem County | 9 | — | Low | Fair |
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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.