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 401–425 of 616
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Hill Reservoir Dam Hampshire County | 41 | 1934 | Significant | Fair |
| Highland Commons Pond B Dam & Dike Worcester County | 50 | 2010 | Significant | Satisfactory |
| High Hill Reservoir Dam Bristol County | 25 | 1898 | Significant | Satisfactory |
| Heywood Reservoir Dam Worcester County | 28 | 1926 | Significant | Poor |
| Hemlock Gorge Spillway Dike Middlesex County | 15 | — | Significant | Satisfactory |
| Haynes Reservoir Dam Worcester County | 15 | — | Significant | Fair |
| Hayes Pond Dam Worcester County | 12 | — | Significant | Poor |
| Hayden Pond Dam Berkshire County | 13 | 1886 | Significant | Fair |
| Hawley Reservoir Dam Hampshire County | 17 | 1890 | Significant | Fair |
| Hawes Pond Dam Bristol County | 10 | — | Significant | Fair |
| Hatchet Pond Dam Worcester County | 12 | — | Significant | Satisfactory |
| Haskins Pond Dam Franklin County | 15 | 1820 | Significant | Poor |
| Harvard Pond Dam Worcester County | 8 | — | Significant | Fair |
| Harris Pond Dam Hampden County | 10 | — | Significant | Fair |
| Hardwick Pond Dam Hampshire County | 8 | — | Significant | Poor |
| Harding Pond Dam Plymouth County | 9 | — | Significant | Poor |
| Hammond Pond Dam Hampshire County | 17 | — | Significant | Fair |
| Hammershop Pond Dam Norfolk County | 13 | — | Significant | Satisfactory |
| Hallockville Pond Dam Franklin County | 15 | — | Significant | Fair |
| Hackett'S Pond Dam Plymouth County | 12 | — | Significant | Satisfactory |
| Griswold Pond Dam Essex County | 12 | 1918 | Significant | Fair |
| Griswold Lower Pond Dam Essex County | 12 | 1983 | Significant | Fair |
| Greylock Greenhouse Dam Berkshire County | 7 | — | Significant | Fair |
| Greenwood Pond Dam Worcester County | 8 | — | Significant | Satisfactory |
| Greenwater Pond Dam Berkshire County | 18 | 1944 | Significant | Fair |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.