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 151–175 of 229
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Hobb Lake Dam Camden County | 12 | 1828 | Significant | Poor |
| High Crest Lake Dam Passaic County | 22 | 1952 | High | Poor |
| Hemlock Lake Dam Sussex County | 20 | 1951 | Significant | Poor |
| Harrisville Dam Burlington County | 13 | 1932 | Significant | Poor |
| Harrisonville Dam Gloucester County | 15 | — | Significant | Poor |
| Hankins Pond Dam Cumberland County | 9 | — | Significant | Poor |
| Hammonton Lake Dam Atlantic County | 13 | 1902 | Significant | Poor |
| Haddon Lake Dam Camden County | 20 | 1917 | Significant | Poor |
| Hackettstown Res. Dam Morris County | 38 | — | High | Poor |
| Greenwood Lake Dam Passaic County | 17 | 1928 | High | Poor |
| Gifford'S Mill Dam Ocean County | — | — | Significant | Poor |
| George Lake Dam Morris County | 30 | 1909 | Significant | Poor |
| Gale Dam Burlington County | 15 | 1970 | Low | Poor |
| Franklinville Lake Dam Gloucester County | 8 | — | Significant | Poor |
| Franklin Lake Dam Monmouth County | 10 | — | Low | Poor |
| Fox Chase Dam Somerset County | 12 | — | Significant | Poor |
| Fountain House Dam Sussex County | 12 | 1956 | Significant | Poor |
| Fawn Lake Dam Sussex County | 22 | 1940 | Significant | Poor |
| Ewans Mill Dam Gloucester County | 15 | — | Significant | Poor |
| Evans Pond Dam Camden County | 7 | 1913 | Significant | Poor |
| Englishtown Lake Dam Monmouth County | 13 | 1959 | Significant | Poor |
| Emma Lake Dam Morris County | 10 | — | Low | Poor |
| Elmer Lake Dam Salem County | 12 | — | Significant | Poor |
| Elkinton Pond Dam Salem County | 20 | 1923 | High | Poor |
| Eden Mill Dam Morris County | 12 | — | Significant | Poor |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.