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 76–100 of 356
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Spot Pond Dike No. 4 Middlesex County | 10 | 1880 | Low | Satisfactory |
| South Meadow Pond Dam Plymouth County | 11 | 1900 | Low | Not Rated |
| Snow Pond Dam Worcester County | 10 | — | Low | Fair |
| Smith Pond Dam Worcester County | 8 | 1928 | Low | Unsatisfactory |
| Smalley Bog Reservoir Dam Plymouth County | 7 | — | Low | Not Rated |
| Sluice Pond Dam Essex County | 12 | 1900 | Low | Poor |
| Silver Lake Dam Plymouth County | 8 | 1908 | Low | Fair |
| Silk Mill Dam Middlesex County | 20 | 1912 | Low | Fair |
| Shovel Shop Pond Dam Bristol County | 9 | 1813 | Low | Fair |
| Sharkey Pond Dam Berkshire County | 25 | — | Low | Poor |
| Scout Pond Dam Hampshire County | 15 | 1937 | Low | Satisfactory |
| Sand Pond Dam Barnstable County | 8 | — | Low | Not Rated |
| Salem Pond Dam Essex County | 12 | 1930 | Low | Fair |
| Saint Yues Bog Dam Plymouth County | 8 | 1941 | Low | Not Rated |
| Russell Mill Pond Plymouth County | 25 | 1898 | Low | Satisfactory |
| Russell Hampden County | 30 | 1905 | Low | Satisfactory |
| Rudd Pond Dam and Dike Berkshire County | 12 | 1920 | Low | Satisfactory |
| Route One Pond West Dam Norfolk County | 11 | — | Low | Unsatisfactory |
| Round Pond Dam Berkshire County | 19 | 1963 | Low | Satisfactory |
| Rocky Pond Road Dam Worcester County | 7 | 1950 | Low | Poor |
| Rocky Hill Pond Dam Hampshire County | 26 | 1924 | Low | Poor |
| Riverdale Mills Worcester County | 10 | 1957 | Low | Satisfactory |
| Richards Reservoir Upper Dam Franklin County | 9 | — | Low | Fair |
| Riceville Pond Dam Worcester County | 13 | 1950 | Low | Fair |
| Reservoir No. 6 Dam Worcester County | 16 | 1905 | Low | Fair |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.