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 276–300 of 544
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Loch Lyall Dam Putnam County | 11 | 1950 | Significant | Poor |
| Lock 4 - Stillwater Rensselaer County | 5 | 1955 | Significant | Satisfactory |
| Lock C-11 Dam Washington County | 15 | 1910 | Significant | Satisfactory |
| Lock C-12 Washington County | 21 | 1911 | Significant | Satisfactory |
| Lock E-16 Dam At Rocky Rift Herkimer County | 6 | 1926 | Significant | Not Rated |
| Lock E-17 Dam At Little Falls Herkimer County | 60 | 1982 | Significant | Not Rated |
| Lock E-18 Dam Herkimer Herkimer County | 6 | 1915 | Significant | Not Rated |
| Long Pond Dam Westchester County | 40 | 1936 | Significant | Poor |
| Lotus Lake Dam Suffolk County | 6 | 1980 | Significant | Poor |
| Lounsbury Pond Dam Westchester County | 15 | 1919 | Significant | Not Rated |
| Lower Ausable Lake Dam Essex County | 10 | 1912 | Significant | Satisfactory |
| Lower Chia Lin Dam Dutchess County | 18 | 1950 | Significant | Fair |
| Lower Cornelius S Smith Dam Delaware County | 15 | 1959 | Significant | Poor |
| Lower Earlville Reservoir Dam Madison County | 25 | — | Significant | Not Rated |
| Lower Greenwich Dam Washington County | 7 | 1925 | Significant | Not Rated |
| Lower Reservoir Dam Otsego County | 20 | — | Significant | Fair |
| Lower Reservoir Dam Madison County | 31 | 1882 | Significant | Poor |
| Lucian Hill Dam Livingston County | 16 | 1967 | Significant | Not Rated |
| Lyon Lodge Dam Ulster County | 12 | 1925 | Significant | Poor |
| Macghee Dam Dutchess County | 10 | 1953 | Significant | Poor |
| Maiden Lane Detention Pond Dam Monroe County | 13 | 1983 | Significant | Not Rated |
| Makely Pond Dam Schoharie County | 12 | — | Significant | Not Rated |
| Mallory Dam Oswego County | 6 | 1909 | Significant | Not Rated |
| Marlborough Water District Dam & Dike Ulster County | 23 | 1964 | Significant | Not Rated |
| Martin Lake Dam (Left) Orange County | 12 | 1929 | Significant | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.