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 232
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Lake Topanemus Dam Monmouth County | 20 | 1915 | High | Fair |
| Lake Tappan Dam Bergen County | 34 | 1966 | High | Satisfactory |
| Lake Tamarack Dam Sussex County | 10 | 1940 | High | Satisfactory |
| Lake Solitude Dam Hunterdon County | 42 | — | High | Satisfactory |
| Lake Rutherford Dam Sussex County | 12 | — | High | Satisfactory |
| Lake Parsippany West Dike #1 Morris County | 8 | 1933 | High | Satisfactory |
| Lake Parsippany East Dike No. 2 Morris County | 5 | 1933 | High | Satisfactory |
| Lake Parsippany Dam Morris County | 13 | 1933 | High | Satisfactory |
| Lake Panorama Dike Sussex County | 15 | 1987 | High | Poor |
| Lake Musconetcong Dam Morris County | 14 | 1933 | High | Satisfactory |
| Lake Mohawk Dam Sussex County | 20 | 1927 | High | Satisfactory |
| Lake Louise Dam Monmouth County | 14 | — | High | Satisfactory |
| Lake Lenape Dam Sussex County | 27 | 1931 | High | Satisfactory |
| Lake Lenape Dam Atlantic County | 29 | 1879 | High | Poor |
| Lake Lefferts Dam Monmouth County | 16 | 1928 | High | Poor |
| Lake Hopatcong Dam Morris County | 17 | 1925 | High | Poor |
| Lake Gilman Dam Gloucester County | 14 | 1928 | High | Satisfactory |
| Lake Gerard Dike C Sussex County | 12 | — | High | Satisfactory |
| Lake Gerard Dike B Sussex County | 15 | — | High | Satisfactory |
| Lake Gerard Dam A Sussex County | 16 | 1930 | High | Satisfactory |
| Lake Gerard Dam Sussex County | 10 | 1930 | High | Satisfactory |
| Lake Estling Dam Morris County | 19 | 1870 | High | Poor |
| Lake Denmark Morris County | 12 | 1904 | High | Poor |
| Lake Conway Dam Sussex County | 21 | 1958 | High | Poor |
| Lake Carasaljo Dam Ocean County | 16 | 1870 | High | Fair |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.