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 326–350 of 616
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Lower Mill Pond Dam Hampshire County | 24 | — | Significant | Fair |
| Lower Meadow Pond Dam Worcester County | 16 | — | Significant | Fair |
| Lower Gore Pond Dam Worcester County | 20 | — | Significant | Poor |
| Lower Chandler Pond Dam Plymouth County | 10 | — | Significant | Satisfactory |
| Lower Bemis Pond Dam Hampden County | 33 | 1862 | Significant | Poor |
| Louisa Lake Dam Worcester County | 13 | 1900 | Significant | Satisfactory |
| Lost Wilderness Lake Southern Dam Hampden County | 23 | 1975 | Significant | Satisfactory |
| Lost Wilderness Lake Northern Dam Hampden County | 23 | 1976 | Significant | Satisfactory |
| Long Pond Dam Bristol County | 14 | — | Significant | Fair |
| Long Pond Dam Hampden County | 8 | 1893 | Significant | Satisfactory |
| Long Pond Dam Berkshire County | 16 | — | Significant | Satisfactory |
| Longmeadow Country Club Dam Hampden County | 18 | 1890 | Significant | Poor |
| Locust Pond Dam Middlesex County | 14 | 1949 | Significant | Satisfactory |
| Little Robin Hood Lake Dam Berkshire County | 17 | 1960 | Significant | Satisfactory |
| Little River Dam Essex County | 12 | — | Significant | Fair |
| Little Nugget Lake Dam Worcester County | 11 | — | Significant | Satisfactory |
| Lily Pond Outlet Dam Essex County | 9 | — | Significant | Fair |
| Liberty Street Dam Plymouth County | 11 | 1695 | Significant | Fair |
| Lexington Reservoir Dam Middlesex County | 10 | — | Significant | Satisfactory |
| Lensdale Pond Dam Worcester County | 21 | — | Significant | Fair |
| Leesville Pond Dam Worcester County | 15 | 1830 | Significant | Fair |
| Lee Pond Dam Worcester County | 26 | 1880 | Significant | Fair |
| Larner Pond Dam Worcester County | 20 | 1830 | Significant | Fair |
| Langwater Pond Dam Bristol County | 11 | — | Significant | Fair |
| Lancaster Mill Pond Dam Worcester County | 26 | — | Significant | Fair |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.