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 1076–1100 of 1,871
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Madison Reforestation #13 Pond Dam #1 Madison County | 15 | 1960 | Low | Not Rated |
| Mahstedt Reservoir Dam Westchester County | 15 | 1885 | Low | Not Rated |
| Maiden Lane Detention Pond Dam Monroe County | 13 | 1983 | Significant | Not Rated |
| Main Mill Dam Clinton County | 25 | 1881 | High | Poor |
| Makely Pond Dam Schoharie County | 12 | — | Significant | Not Rated |
| Mallard Lake Dam Westchester County | 11 | 1939 | Low | Not Rated |
| Mallory Dam Oswego County | 6 | 1909 | Significant | Not Rated |
| Mallory Pond Dam Sullivan County | 7 | 1950 | Low | Not Rated |
| Mamaroneck Reservoir Dam Westchester County | 19 | 1928 | High | Poor |
| Mance Pond Dam Delaware County | 12 | 1991 | Low | Not Rated |
| Maple Lake Dam Herkimer County | 12 | 1905 | Low | Not Rated |
| Marcell Roth Lake Dam Putnam County | 12 | 1955 | High | Satisfactory |
| Marcy Reservoir #11 Dam Oneida County | 44 | 1915 | High | Not Rated |
| Marcy Reservoir Dam Oneida County | 32 | 1919 | Low | Not Rated |
| Mariaville Lake Dam Schenectady County | 16 | 1925 | High | Not Rated |
| Marion Teachout Wildlife Marsh Dam Cayuga County | 9 | 1958 | Low | Not Rated |
| Marlborough Water District Dam & Dike Ulster County | 23 | 1964 | Significant | Not Rated |
| Marsh Creek Dam Steuben County | 10 | 1951 | Low | Not Rated |
| Marsh Pond Dam Madison County | 10 | — | Low | Not Rated |
| Martin Dunham Reservoir Dam Rensselaer County | 59 | 1913 | High | Poor |
| Martin Lake Dam (Left) Orange County | 12 | 1929 | Significant | Not Rated |
| Martin Lake Dam (Right) Orange County | 12 | 1929 | Significant | Not Rated |
| Martlings Pond Dam Richmond County | 25 | — | Significant | Fair |
| Mason Farm Pond Dam Columbia County | 15 | 1965 | Significant | Poor |
| Masonville Dam Delaware County | 30 | — | Low | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.