New York Dams
1,871 dams tracked by the National Inventory of Dams
Total Dams
1,871
High Hazard
419
22.4%
Poor / Unsatisfactory
289
Average Age
89 yrs
Hazard Classification
High419 (22.4%)
Significant544 (29.1%)
Low901 (48.2%)
Condition Assessment
Satisfactory348 (18.6%)
Fair98 (5.2%)
Poor / Unsatisfactory289 (15.4%)
Not Rated1,136 (60.7%)
Federal
26
State
281
Local
506
Private
785
Tallest Dams
- Mount Morris Dam249 ft
- Ashokan Dam213 ft
- Downsville Dam204 ft
- Merriman Dam195 ft
- Neversink Reservoir Dam190 ft
High Hazard Dams
- Mount Morris DamHigh
- Ashokan DamHigh
- Downsville DamHigh
- Merriman DamHigh
- Neversink Reservoir DamHigh
Poor Condition Dams
- Inghams DamPoor
- Toronto Unsatisfactory
- Mill Brook Site 2 DamPoor
- Sidney Reservoir #5 DamPoor
- 60 Foot DamPoor
All Dams in New York
Showing 1651–1675 of 1,871
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Thomas L Ryan Dam Chenango County | 7 | 1956 | Low | Not Rated |
| Thompson Island Dam Saratoga County | 15 | 1910 | Low | Not Rated |
| Thorne Dam Dutchess County | 38 | 1905 | High | Fair |
| Thunder View Farms Dam Sullivan County | 19 | 1992 | Low | Not Rated |
| Tillson Lake Dam Ulster County | 39 | 1930 | High | Poor |
| Timber Estates Dam Sullivan County | 12 | — | Low | Not Rated |
| Titicus Dam Westchester County | 109 | 1895 | High | Satisfactory |
| Tivoli Lake Dam Albany County | 9 | 1851 | Low | Not Rated |
| Tivoli Lake Dam Rockland County | 29 | 1908 | High | Poor |
| Tivoli Lake Spillway Rockland County | 5 | 1908 | Significant | Not Rated |
| Toasperns Pond Dam Sullivan County | 27 | 1940 | High | Fair |
| Tobin Northrup Marsh Dam Steuben County | 10 | 1956 | Low | Not Rated |
| Tomahawk Lake Dam Orange County | 25 | 1929 | High | Satisfactory |
| Tomhannock Reservoir Dam Rensselaer County | 68 | 1905 | High | Satisfactory |
| Tomkins Cove Dam Rockland County | 8 | 1915 | Significant | Poor |
| Tomsey Pond Dam Tioga County | 18 | 1955 | Low | Not Rated |
| Toronto Sullivan County | 103 | 1926 | High | Unsatisfactory |
| Toronto Lake Dam Sullivan County | 15 | — | Low | Not Rated |
| Torpy Pond Dam Madison County | 12 | 1963 | Low | Not Rated |
| Town of Mt. Pleasant Water District #1 Dam Westchester County | 35 | 1915 | Significant | Not Rated |
| Town of Mt. Pleasant Water District #2 Dam Westchester County | 10 | 1915 | Significant | Not Rated |
| Town of Mt. Pleasant Water District #3 Dam Westchester County | 7 | 1915 | Significant | Not Rated |
| Tranquility Camp Dam Greene County | 13 | 1977 | Low | Not Rated |
| Treadwell Mills Clinton County | 24 | 1938 | Significant | Satisfactory |
| Treasure Lake Dam Sullivan County | 7 | 1911 | Significant | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.