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 1–25 of 266
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Yards Creek Auxiliary Reservoir Dam Warren County | 22 | 1965 | Low | Satisfactory |
| Wrights Dam Ocean County | 12 | — | Low | Not Rated |
| Wreck Pond Dam Monmouth County | 20 | — | Low | Not Rated |
| Woodmere Dam Salem County | 13 | 1900 | Low | Not Rated |
| Willow Pond Dam Burlington County | 8 | 1968 | Low | Not Available |
| Williams Dam Hunterdon County | 22 | — | Low | Not Rated |
| Wildwood Lake Dam Sussex County | 7 | — | Low | Not Rated |
| Wildwood Dike Morris County | 8 | — | Low | Satisfactory |
| Wildlife Drive Dike Atlantic County | 12 | 1959 | Low | Poor |
| Wildcat Ridge Wma Dam Morris County | 10 | — | Low | Not Rated |
| Wickapecko Dam Monmouth County | 13 | 1915 | Low | Not Rated |
| Whites Pond Dam Bergen County | 11 | 1938 | Low | Fair |
| Wetland Area I-2 Dam Monmouth County | 9 | 1990 | Low | Satisfactory |
| Wells Mill Reservoir Dam Ocean County | 9 | — | Low | Satisfactory |
| Weavers Pond Dam Passaic County | 8 | — | Low | Not Rated |
| Warrington Mill Dam Gloucester County | 20 | — | Low | Unsatisfactory |
| Wallkill Lake Dam Sussex County | 15 | 1930 | Low | Fair |
| Village Dock Lake Dam Gloucester County | 7 | — | Low | Poor |
| Veteran Memorial Lake Dam Salem County | 14 | 1922 | Low | Satisfactory |
| Ursino Dam Union County | 13 | 1927 | Low | Not Rated |
| Upper Waterloo Lake Dam Sussex County | 9 | — | Low | Poor |
| Upper Twin Lakes Dam Passaic County | 7 | — | Low | Poor |
| Upper Lummis Pond Dam Cumberland County | 8 | — | Low | Not Rated |
| Turn Mill Pond Dam Ocean County | 13 | — | Low | Fair |
| Tomahawk Lake Dam Sussex County | 14 | — | Low | Not Rated |
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Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.