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 626–650 of 1,291
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Mahoney Pond Dam Worcester County | 9 | 1964 | Significant | Fair |
| Mahar Regional School Dam Franklin County | 10 | 1956 | Significant | Satisfactory |
| Magoun Pond Dam Plymouth County | 16 | 1991 | Significant | Satisfactory |
| Lynn Waterways Dam Essex County | 8 | 1915 | Low | Fair |
| Lynn Reservoir Dam Essex County | 10 | 1872 | Significant | Satisfactory |
| Lynde Brook Reservoir Dike Worcester County | 17 | 1876 | High | Fair |
| Lynde Brook Reservoir Dam Worcester County | 61 | 1876 | High | Satisfactory |
| Luther Reservoir Dam Bristol County | 16 | — | Low | Satisfactory |
| Lunden Dam Hampden County | 10 | 1958 | Significant | Fair |
| Lumbert Pond Dam Barnstable County | 11 | — | Significant | Poor |
| Ludlow Reservoir Dam Hampden County | 19 | 1877 | High | Satisfactory |
| Lowes Pond Dam Worcester County | 15 | — | Significant | Unsatisfactory |
| Lower Van Horn Reservoir Dam Hampden County | 52 | 1848 | High | Satisfactory |
| Lower Stoneville Pond Dam Worcester County | 15 | 1904 | High | Fair |
| Lower Spectacle Pond Dam Berkshire County | 11 | — | Low | Poor |
| Lower Sibley Pond Dam Worcester County | 14 | — | Significant | Poor |
| Lower Shawme Lake Dam Barnstable County | 10 | 1654 | Significant | Satisfactory |
| Lower Sandra Pond Dam Worcester County | 10 | 1991 | Significant | Fair |
| Lower Root Reservoir Dam Berkshire County | 34 | — | High | Satisfactory |
| Lower Porter Pond Dam Plymouth County | 9 | 1940 | Significant | Fair |
| Lower Naukeag Lake Dam Worcester County | 14 | 1900 | High | Fair |
| Lower Mill Pond Dam Hampshire County | 24 | — | Significant | Fair |
| Lower Mill Pond Dam Barnstable County | 7 | 1920 | Low | Satisfactory |
| Lower Millpond Dam Essex County | 11 | — | Low | Unsatisfactory |
| Lower Merino Pond Dam Worcester County | 24 | 1850 | High | Fair |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.