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 476–500 of 830
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Mashipacong Pond Dam Sussex County | 12 | — | Low | Not Rated |
| Maskells Mill Pond Dam Salem County | 13 | 1955 | Significant | Poor |
| Matawan Lake Dam Monmouth County | 20 | 1923 | High | Poor |
| Matrix Detention Basin Mercer County | 8 | — | Low | Not Rated |
| Mcafee Glenwood Road Dam No. 1 Sussex County | 8 | 2000 | Significant | Satisfactory |
| Mcafee Glenwood Road Dam No. 2 Sussex County | 15 | 2000 | Significant | Satisfactory |
| Mcmillan Reservoir Dam Bergen County | 21 | — | Low | Fair |
| Mcvicker'S Brook Dam Morris County | 32 | — | Significant | Poor |
| Meisle (Nummy) Lake Dam Cape May County | 7 | — | Low | Not Rated |
| Memorial Park Dam Cumberland County | 8 | — | Significant | Poor |
| Memorial Park Pond Dam Somerset County | 8 | — | High | Poor |
| Merrill Creek Main Dam Warren County | 280 | 1988 | High | Satisfactory |
| Merrill Creek Northwest Dike 1 Warren County | 20 | — | High | Satisfactory |
| Merrill Creek Northwest Dike 2 Warren County | 20 | — | High | Satisfactory |
| Merrill Creek Res. Se Dike Warren County | 39 | — | High | Satisfactory |
| Mickels Mill Dam Salem County | 10 | 1928 | Low | Not Rated |
| Midvale Dam Passaic County | 61 | 1928 | High | Satisfactory |
| Mill Dam Burlington County | 15 | 1908 | Low | Poor |
| Millhurst Lake Dam Monmouth County | 23 | 1915 | High | Satisfactory |
| Mill Pond Dam Bergen County | 21 | 1908 | High | Fair |
| Mill Pond Dam Middlesex County | 8 | — | Low | Poor |
| Milton Lake Dam Union County | 10 | 1937 | Significant | Satisfactory |
| Mine Hill Reservoir Dam Morris County | 30 | 1896 | Significant | Poor |
| Mirror Lake Dam Burlington County | 18 | 1880 | High | Satisfactory |
| Mishe - Mokwa Dam Burlington County | 16 | — | High | Satisfactory |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.