Map of All 586 Maine Dams
Maine has 586 dams in the National Inventory of Dams — and 78 are classified as high hazard (13% of the state’s total), meaning failure would likely cause loss of life. 19 Maine dams are both high-hazard and in poor or unsatisfactory condition.
Use the interactive Maine dams map below to explore every dam in the state, color-coded by hazard level. Click any dam for its condition assessment, last inspection date, and Emergency Action Plan status. Or view the full US Dams interactive map to compare Maine to every other state.
Hazard
Condition
Purpose
Maine Dams by the Numbers
- 586 total dams in Maine
- 78 high hazard — failure would likely cause loss of life
- 78 significant hazard
- 429 low hazard
- 81 in poor or unsatisfactory condition (66 poor, 15 unsatisfactory)
- 19 Maine dams are both high-hazard AND in poor/unsatisfactory condition
Data source: US Army Corps of Engineers, National Inventory of Dams (NID).
The Tallest Dams in Maine
The tallest dam in Maine is Indian Pond at 175 feet, completed in 1955. The 10 tallest Maine dams from the National Inventory of Dams:
| Dam | Height | Year | Primary Purpose | Condition | County |
|---|---|---|---|---|---|
| Indian Pond | 175 ft | 1955 | Hydroelectric | Satisfactory | Somerset |
| Wyman | 155 ft | 1930 | Hydroelectric | Satisfactory | Somerset |
| Gulf Island | 99 ft | 1926 | Hydroelectric | Satisfactory | Androscoggin |
| Ripogenus | 83 ft | 1916 | Hydroelectric | Satisfactory | Piscataquis |
| Skelton | 75 ft | 1948 | Hydroelectric | Satisfactory | York |
| Violette Brook | 75 ft | 1975 | Flood Risk Reduction | Fair | Aroostook |
| Aziscohos | 74 ft | 1911 | Hydroelectric | Satisfactory | Oxford |
| Mount Zircon | 70 ft | 1914 | Water Supply | Fair | Oxford |
| Bonny Eagle | 67 ft | 1911 | Hydroelectric | Satisfactory | York |
| Dolby | 66 ft | 1906 | Hydroelectric | Satisfactory | Penobscot |
High-Hazard Maine Dams in Poor Condition
The most concerning dams are those classified as high-hazard that also carry a Poor or Unsatisfactory condition rating — 19 dams in Maine. Notable examples:
- Libby Brook (53 ft, Aroostook County) — Flood Risk Reduction, Unsatisfactory condition
- Grand Falls (50 ft) — Hydroelectric, Unsatisfactory condition
- Woodland (46 ft, Washington County) — Hydroelectric, Poor condition
- Bryant Pond (45 ft, Aroostook County) — Flood Risk Reduction, Unsatisfactory condition
- Josephine (31 ft, Aroostook County) — Hydroelectric, Unsatisfactory condition
Filter the interactive US Dams map by hazard and condition to see all of them on one view.
Dam Safety in Maine
Dam safety in Maine is overseen by the state dam safety program, in coordination with federal regulators: the US Army Corps of Engineers, the Bureau of Reclamation (for federal water projects), the Tennessee Valley Authority where applicable, and the Federal Energy Regulatory Commission (FERC) for licensed hydropower dams. Emergency Action Plans are typically required for high-hazard dams under state regulations.
Frequently Asked Questions
How many dams are in Maine?
Maine has 586 dams in the National Inventory of Dams tracked by the US Army Corps of Engineers: 78 high hazard, 78 significant hazard, and 429 low hazard.
What is the tallest dam in Maine?
The tallest dam in Maine is Indian Pond at 175 feet, completed in 1955. It is primarily a hydroelectric structure.
How many Maine dams are in poor condition?
81 Maine dams are currently rated as being in Poor or Unsatisfactory condition. Of those, 19 are also classified as high-hazard — meaning failure would likely cause loss of life.
