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 601–625 of 830
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Pine Mill Lake Dam Burlington County | 18 | — | Low | Poor |
| Pines Lake Dam Passaic County | 42 | 1927 | High | Satisfactory |
| Plainsboro Pond Dam Middlesex County | 11 | — | Significant | Satisfactory |
| Pleasant Mills Dam Atlantic County | 16 | — | Significant | Poor |
| Pleasant Valley Lake Dam Sussex County | 31 | — | High | Poor |
| Pleasant Valley Lake Dam Morris County | 35 | 1933 | High | Satisfactory |
| Pocahontas Dam Morris County | 11 | 1920 | High | Satisfactory |
| Pohatcong Lake Dam Ocean County | 9 | 1931 | High | Satisfactory |
| Point View Dam Passaic County | 55 | 1964 | High | Satisfactory |
| Pompton Dam Passaic County | 22 | — | Low | Fair |
| Pompton Lakes Dam Passaic County | 30 | 1908 | High | Satisfactory |
| Porches Mill Dam Gloucester County | 20 | 1923 | Low | Unsatisfactory |
| Poricy Dam Monmouth County | 8 | — | Low | Not Rated |
| Post Brook Dam Passaic County | 15 | 1923 | High | Satisfactory |
| Powder Mill Pond Dam Morris County | 35 | — | High | Poor |
| Powder Mill Pond Dam Somerset County | 9 | — | Significant | Poor |
| Preakness Hills C.C. Dam No. 1 Passaic County | 15 | — | High | Satisfactory |
| Princeton Walk Dam Middlesex County | 16 | 1988 | Significant | Satisfactory |
| Prospertown Dam Ocean County | 19 | 1966 | High | Poor |
| Quick Pond Dam Sussex County | 15 | — | Low | Not Rated |
| Quinton Pond Dam Salem County | 9 | — | Significant | Satisfactory |
| Rainbow Dam Ocean County | 13 | 1938 | High | Satisfactory |
| Rainbow Lake Dam Salem County | 20 | 1774 | Significant | Fair |
| Rainbow Lakes Dam Morris County | 11 | — | High | Fair |
| Ramapo Lake Dam Bergen County | 13 | — | High | Poor |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.