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 351–375 of 544
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Heuvelton St. Lawrence County | 35 | 1923 | Significant | Satisfactory |
| Herr Pond Dam Allegany County | 29 | 1956 | Significant | Not Rated |
| Henrich Pond Dam Rockland County | 10 | 1960 | Significant | Poor |
| Hemlock Lake Dam Sullivan County | 27 | 1890 | Significant | Not Rated |
| Hastings Power Dam Rensselaer County | 22 | 1920 | Significant | Poor |
| Harvey Pond Dam Tioga County | 22 | 2002 | Significant | Poor |
| Hartwick Reservoir Dam Otsego County | 23 | 1924 | Significant | Poor |
| Harrower Lower Dam Montgomery County | 8 | 1898 | Significant | Not Rated |
| Harrison Dam Orange County | 15 | — | Significant | Not Rated |
| Harold Toppel Dam Columbia County | 17 | 1973 | Significant | Poor |
| Harmony Lake Dam Dutchess County | 16 | 1931 | Significant | Not Rated |
| Hannibal Dam Oswego County | 10 | 1907 | Significant | Fair |
| Halls Waste Weir Dam Niagara County | 17 | 1918 | Significant | Not Rated |
| Halfway Brook Reservoir Dam Warren County | 28 | 1936 | Significant | Not Rated |
| Halcottsville Dam Delaware County | 7 | 1909 | Significant | Poor |
| Hailsboro Mill #3 Dam St. Lawrence County | 16 | 1910 | Significant | Not Rated |
| Hailesboro Mill #6 Dam St. Lawrence County | 14 | — | Significant | Not Rated |
| Hailesboro #4 Plant Dam St. Lawrence County | 12 | 1912 | Significant | Not Rated |
| Guymard Lake Dam Orange County | 35 | 1858 | Significant | Poor |
| Grossingers Lake Dam Sullivan County | 15 | 1950 | Significant | Not Rated |
| Groos Pond Dam Sullivan County | 10 | 1940 | Significant | Poor |
| Green Mountain Lake Dam Dutchess County | 17 | — | Significant | Not Rated |
| Greenburg Dam Dutchess County | 16 | 1965 | Significant | Poor |
| Granby Oswego County | 15 | 1926 | Significant | Satisfactory |
| Graffenburg Reservoir Dam Herkimer County | 55 | 1854 | Significant | Poor |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.