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 226–250 of 616
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Old Water Supply Dam Middlesex County | 13 | 1900 | Significant | Satisfactory |
| Old Pond Dam Bristol County | 9 | 1751 | Significant | Poor |
| Old Oaken Bucket Pond Dam Plymouth County | 6 | 1640 | Significant | Satisfactory |
| Old Mill Pond Dam Worcester County | 15 | 1800 | Significant | Satisfactory |
| Old Mill Pond Dam Worcester County | 13 | — | Significant | Poor |
| Old Mill Pond Dam Dukes County | 5 | — | Significant | Satisfactory |
| Old Mill Pond Dam Worcester County | 18 | — | Significant | Poor |
| Old Grist Mill Pond Dam Worcester County | 19 | 1953 | Significant | Fair |
| Old Duck Pond Dam Worcester County | 12 | — | Significant | Poor |
| O'Brien Pond Dam Hampshire County | 13 | — | Significant | Poor |
| Oakman Pond Dam Plymouth County | 13 | — | Significant | Satisfactory |
| Nye Pond Dam Barnstable County | 11 | 1669 | Significant | Poor |
| Number One Pond Dam Worcester County | 11 | — | Significant | Poor |
| Noyes Pond Dam Worcester County | 16 | 1920 | Significant | Satisfactory |
| Norumbega Reservoir Dike No. 3 Middlesex County | 34 | 1940 | Significant | Satisfactory |
| Norumbega Reservoir Dike No. 2 Middlesex County | 34 | 1940 | Significant | Satisfactory |
| Northborough Reservoir Dam Worcester County | 15 | — | Significant | Poor |
| Noanet Pond Dam Norfolk County | 18 | 1963 | Significant | Satisfactory |
| Nichols Road Dam Norfolk County | 10 | — | Significant | Satisfactory |
| Newton Pond Dam Worcester County | 12 | 1949 | Significant | Satisfactory |
| Newton Lower Falls Dam Middlesex County | 12 | — | Significant | Poor |
| New Pond Dam Bristol County | 16 | 1810 | Significant | Fair |
| New Pond Dam Worcester County | 18 | — | Significant | Fair |
| New Charles River Dam Suffolk County | 36 | 1978 | Significant | Satisfactory |
| New Bedford Reservoir Dam Bristol County | 10 | 1867 | Significant | Fair |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.