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 876–900 of 1,291
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Pine Island Lake Dam Hampshire County | 25 | 1920 | High | Satisfactory |
| Pine Island Lake Dike Hampshire County | 15 | 1920 | Significant | Fair |
| Pine Tree Brook Pl-566 Flood Control Dam Norfolk County | 21 | 1955 | Significant | Satisfactory |
| Plantain Pond Dam Berkshire County | 15 | 1947 | Significant | Fair |
| Pleasant Falls Mill Pond Dam Worcester County | 19 | 1895 | Significant | Satisfactory |
| Plimpton Pond Dam Norfolk County | 19 | 1925 | Low | Poor |
| Plow Shop Pond Dam Middlesex County | 7 | 1856 | Low | Poor |
| Plunkett Reservoir Dam Berkshire County | 25 | 1875 | High | Fair |
| Pond 1 Dam Worcester County | 12 | 1974 | Significant | Fair |
| Pond 3 Dam Worcester County | 7 | — | Significant | Fair |
| Pond At West Road Dam Middlesex County | 20 | — | Low | Unsatisfactory |
| Pondville Pond Dam Worcester County | 15 | 1875 | Significant | Fair |
| Ponkapoag Pond Dam Norfolk County | 7 | 1930 | Significant | Fair |
| Pontoosuc Lake Dam Berkshire County | 20 | 1866 | High | Satisfactory |
| Porter Lake Dam Hampden County | 24 | 1919 | Significant | Poor |
| Powder Mill Worcester County | 10 | 1908 | Low | Satisfactory |
| Powdermill Brook Pl-566 Flood Control Dam Hampden County | 48 | 1962 | High | Fair |
| Pratts Pond Dam Worcester County | 12 | — | High | Fair |
| Pratt'S Pond Dam Worcester County | 11 | — | Significant | Fair |
| Prindle Lake Dam Worcester County | 11 | 1952 | Significant | Satisfactory |
| Prospect Hill Reservoir Dam Bristol County | 54 | 1956 | Significant | Satisfactory |
| Prospect Lake Dam Berkshire County | 6 | — | Significant | Poor |
| Provin Mountain Reservoir Dam Hampden County | 30 | 1910 | High | Satisfactory |
| Pud'S Pond Dam Norfolk County | 12 | 1800 | Low | Poor |
| Pulpit Rock Pond Dam and Auxiliary Spillway Hampden County | 20 | — | Significant | Fair |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.