Massachusetts Dams
1,291 dams tracked by the National Inventory of Dams
Total Dams
1,291
High Hazard
319
24.7%
Poor / Unsatisfactory
336
Average Age
112 yrs
Hazard Classification
High319 (24.7%)
Significant616 (47.7%)
Low356 (27.6%)
Condition Assessment
Satisfactory441 (34.2%)
Fair464 (35.9%)
Poor / Unsatisfactory336 (26.0%)
Not Rated50 (3.9%)
Federal
15
State
211
Local
585
Private
451
Tallest Dams
- Cobble Mountain Reservoir Dam245 ft
- Quabbin Winsor Dam170 ft
- Littleville Dam164 ft
- Bear Swamp - North Dike 155 ft
- Knightville Dam150 ft
High Hazard Dams
Poor Condition Dams
All Dams in Massachusetts
Showing 476–500 of 1,291
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Number One Pond Dam Worcester County | 11 | — | Significant | Poor |
| Noyes Pond Dam Worcester County | 16 | 1920 | Significant | Satisfactory |
| Notown Reservoir Dike Worcester County | 25 | 1876 | High | Fair |
| Notown Reservoir Dam Worcester County | 26 | 1876 | High | Fair |
| Notch Reservoir Dam Berkshire County | 64 | 1897 | High | Poor |
| Norumbega Reservoir East Dike Middlesex County | 34 | 1940 | High | Satisfactory |
| Norumbega Reservoir Dike No. 4 Middlesex County | 34 | 1940 | High | Satisfactory |
| Norumbega Reservoir Dike No. 3 Middlesex County | 34 | 1940 | Significant | Satisfactory |
| Norumbega Reservoir Dike No. 2 Middlesex County | 34 | 1940 | Significant | Satisfactory |
| Norumbega Reservoir Dam No. 1 Middlesex County | 42 | 1940 | High | Fair |
| Norton Reservoir Dam Bristol County | 17 | — | High | Satisfactory |
| North Watuppa Pond Dam Bristol County | 11 | 1963 | High | Fair |
| North Village Pond Worcester County | 13 | 1914 | Low | Satisfactory |
| North Silver Lake Dam Berkshire County | 76 | — | High | Fair |
| North Reservoir Dam Middlesex County | 25 | 1874 | High | Poor |
| North Harwich Reservoir Dam Barnstable County | 8 | 1880 | Low | Fair |
| Northfield Mt. - Upper Reservoir Intake Franklin County | 20 | 1973 | High | Satisfactory |
| Northborough Reservoir Dam Worcester County | 15 | — | Significant | Poor |
| Norcross Pond No. 3 Dam Hampden County | 16 | — | Low | Poor |
| Norcross Pond No. 2 Dam Hampden County | 19 | — | Low | Poor |
| Noquochoke Lake Dam Bristol County | 14 | 1854 | High | Fair |
| Noanet Pond Dam Norfolk County | 18 | 1963 | Significant | Satisfactory |
| Niskayuna Pond Dam Berkshire County | 25 | — | Low | Fair |
| Nichols Road Dam Norfolk County | 10 | — | Significant | Satisfactory |
| Newton Reservoir Dam Worcester County | 30 | 1903 | Low | Fair |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.