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 373
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Morris County Ymca Dam Morris County | 18 | 1928 | Significant | Satisfactory |
| Monksville Dam Passaic County | 150 | 1986 | High | Satisfactory |
| Mishe - Mokwa Dam Burlington County | 16 | — | High | Satisfactory |
| Mirror Lake Dam Burlington County | 18 | 1880 | High | Satisfactory |
| Milton Lake Dam Union County | 10 | 1937 | Significant | Satisfactory |
| Millhurst Lake Dam Monmouth County | 23 | 1915 | High | Satisfactory |
| Midvale Dam Passaic County | 61 | 1928 | High | Satisfactory |
| Merrill Creek Res. Se Dike Warren County | 39 | — | High | Satisfactory |
| Merrill Creek Northwest Dike 2 Warren County | 20 | — | High | Satisfactory |
| Merrill Creek Northwest Dike 1 Warren County | 20 | — | High | Satisfactory |
| Merrill Creek Main Dam Warren County | 280 | 1988 | High | Satisfactory |
| Mcafee Glenwood Road Dam No. 2 Sussex County | 15 | 2000 | Significant | Satisfactory |
| Mcafee Glenwood Road Dam No. 1 Sussex County | 8 | 2000 | Significant | Satisfactory |
| 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 |
| Manasquan Reservoir Dam Monmouth County | 53 | 1990 | High | Satisfactory |
| Manalapan Lake Dam Middlesex County | 15 | — | High | Satisfactory |
| Lower Twin Lakes Dam Passaic County | 10 | 1927 | Significant | Satisfactory |
| Lower Mountain Lake Dam Mercer County | 13 | — | Significant | Satisfactory |
| Lower Aetna Lake Dam Burlington County | 12 | 1926 | Significant | Satisfactory |
| Lookover Lake Dam Passaic County | 12 | — | High | Satisfactory |
| Locust Lake Dam Warren County | 21 | — | High | Satisfactory |
| Lindy'S Lake Dam Passaic County | 24 | — | High | Satisfactory |
| Ledgewood Pond Dam Morris County | 7 | — | Significant | Satisfactory |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.