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 476–500 of 1,291
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Heywood Reservoir Dam Worcester County | 28 | 1926 | Significant | Poor |
| Hickory Hills Lake Dam Worcester County | 18 | — | High | Satisfactory |
| High Hill Reservoir Dam Bristol County | 25 | 1898 | Significant | Satisfactory |
| Highland Commons Pond B Dam & Dike Worcester County | 50 | 2010 | Significant | Satisfactory |
| Highland Lake Dam Norfolk County | 20 | 1830 | Low | Poor |
| Higley Brook Dam Berkshire County | 12 | 1971 | Low | Satisfactory |
| Hill Reservoir Dam Hampshire County | 41 | 1934 | Significant | Fair |
| Hillside Beach Dam Hampshire County | 21 | — | High | Fair |
| Hobart Pond Dam Plymouth County | 10 | 1693 | Low | Poor |
| Hobbs Pond Dam Middlesex County | 9 | 1900 | Low | Satisfactory |
| Hobbys Pond Dam Worcester County | 7 | — | Significant | Poor |
| Hodges Village Dam Worcester County | 54 | 1959 | High | Not Available |
| Holbrook Mill Pond Dam Worcester County | 16 | — | Significant | Poor |
| Holden Reservoir Dam No. 1 Worcester County | 47 | 1883 | High | Fair |
| Holden Reservoir Dam No. 2 Worcester County | 57 | 1900 | High | Satisfactory |
| Hollingsworth & Vose Company Dam Middlesex County | 17 | 1900 | Low | Fair |
| Hollingsworth & Vose Dam Norfolk County | 12 | — | Significant | Fair |
| Holmes Street Dam Plymouth County | 12 | 1900 | Low | Fair |
| Holyoke - Overflow No. 1 Hampden County | 30 | 1850 | High | Satisfactory |
| Hop Brook Dam Worcester County | 23 | 1962 | High | Satisfactory |
| Hopedale Pond Dam Worcester County | 19 | — | Significant | Fair |
| Hopkinton Reservoir Dam Middlesex County | 58 | 1891 | High | Satisfactory |
| Hopkinton State Park Swimming Pool Dam Middlesex County | 16 | 1967 | High | Satisfactory |
| Hoppin Hill Reservoir Dam Bristol County | 27 | 1910 | High | Satisfactory |
| Horn Pond Dam Middlesex County | 15 | 1989 | Significant | Fair |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.