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 451–475 of 1,291
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Hammond Pond Dam Hampshire County | 17 | — | Significant | Fair |
| Harding Pond Dam Plymouth County | 9 | — | Significant | Poor |
| Hardwick Pond Dam Hampshire County | 8 | — | Significant | Poor |
| Harlow Brook No. 2 Dam Plymouth County | 12 | 1953 | Low | Not Rated |
| Harnett Pond Dam Berkshire County | 14 | 1909 | Low | Fair |
| Harris Pond Dam Hampden County | 10 | — | Significant | Fair |
| Hartley Saw Mill Pond Dam Plymouth County | 10 | — | Low | Fair |
| Harvard Pond Dam Worcester County | 8 | — | Significant | Fair |
| Harwich Lower Reservoir Dam Plymouth County | 11 | 1900 | Low | Not Rated |
| Haskell Pond Dam Essex County | 43 | 1903 | High | Poor |
| Haskins Pond Dam Franklin County | 15 | 1820 | Significant | Poor |
| Hatchet Pond Dam Worcester County | 12 | — | Significant | Satisfactory |
| Hathaway Pond Dam Plymouth County | 9 | 1900 | Low | Unsatisfactory |
| Hawes Pond Dam Bristol County | 10 | — | Significant | Fair |
| Hawkes Pond Outlet Dam Essex County | 26 | 1895 | High | Fair |
| Hawley Reservoir Dam Hampshire County | 17 | 1890 | Significant | Fair |
| Hayden Pond Dam Plymouth County | 12 | 1900 | Low | Poor |
| Hayden Pond Dam Berkshire County | 13 | 1886 | Significant | Fair |
| Hayes Pond Dam Berkshire County | 11 | 1840 | Low | Fair |
| Hayes Pond Dam Worcester County | 12 | — | Significant | Poor |
| Haynes Reservoir Dam Worcester County | 15 | — | Significant | Fair |
| Heald Pond Dam Middlesex County | 8 | 1900 | Low | Poor |
| Hebronville Pond Dam Bristol County | 14 | 1875 | High | Satisfactory |
| Hemlock Gorge Spillway Dike Middlesex County | 15 | — | Significant | Satisfactory |
| Hewitt Pond Dam Bristol County | 7 | — | Low | Poor |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.