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 126–150 of 332
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Mary Elmer Lake Dam Cumberland County | 15 | 1924 | Significant | Satisfactory |
| Marlton Lakes Upper Dam Burlington County | 12 | 1940 | Significant | Satisfactory |
| Manor Lake Dam Morris County | 5 | — | Significant | Satisfactory |
| Manalapan Brook Pond Dam Monmouth County | 14 | 1924 | Significant | Poor |
| Manahawkin Lake Dam Ocean County | 12 | 1929 | Significant | Poor |
| Malaga Dam Gloucester County | 22 | — | Significant | Fair |
| Magnolia Lake Dam Cape May County | 8 | 1684 | Significant | Poor |
| Ludlam Pond Dam Cape May County | 7 | — | Significant | Poor |
| Lower Twin Lakes Dam Passaic County | 10 | 1927 | Significant | Satisfactory |
| Lower Mountain Lake Dam Mercer County | 13 | — | Significant | Satisfactory |
| Lower Crest Lake Dam Passaic County | — | — | Significant | Poor |
| Lower Aetna Lake Dam Burlington County | 12 | 1926 | Significant | Satisfactory |
| Little Gloucester Dam Camden County | 20 | — | Significant | Poor |
| Liberty Lake Dam Warren County | 23 | — | Significant | Poor |
| Levine Reservoir Dam Passaic County | 10 | — | Significant | Fair |
| Ledgewood Pond Dam Morris County | 7 | — | Significant | Satisfactory |
| Leddell'S Pond Dam Morris County | 12 | — | Significant | Satisfactory |
| Lebanon Lake Dam Burlington County | 10 | 1956 | Significant | Poor |
| Lebanon Forest #1 Dam Burlington County | 10 | — | Significant | Satisfactory |
| Layton'S Lake Dam Salem County | 19 | 1972 | Significant | Satisfactory |
| Lake Valentine Dam Sussex County | 12 | — | Significant | Poor |
| Lake Telemark Dam Morris County | 11 | 1924 | Significant | Satisfactory |
| Lake Stockwell Dam Burlington County | 12 | 1926 | Significant | Satisfactory |
| Lake Stockholm Dam Sussex County | 16 | 1920 | Significant | Satisfactory |
| Lake Shenandoah Dam Ocean County | 17 | 1934 | Significant | Fair |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.