Upper Dam, located in Errol, Maine, along the Rapid River, is a hydroelectric dam completed in 1883.
Wind
Humidity
With a height of 25 feet and a length of 1500 feet, the dam has a storage capacity of 192,039 acre-feet and serves as a controlled spillway with a width of 200 feet. The dam is primarily regulated by the Federal Energy Regulatory Commission and has a high hazard potential due to its age and condition.
This historic dam, constructed with buttress, earth, and rockfill materials, plays a crucial role in providing hydroelectric power to the region. The dam's controlled spillway and outlet gates, including slide and tainter gates, help manage the flow of water and ensure the safety of the surrounding areas. Despite its age, the dam has a very high risk assessment rating, indicating the need for continued monitoring and maintenance to prevent potential hazards.
As a key infrastructure for water resource and climate enthusiasts, Upper Dam serves as a reminder of the importance of sustainable energy solutions and the need to balance environmental impact with energy production. With its rich history and significant storage and discharge capabilities, the dam represents a vital piece of Maine's hydroelectric infrastructure and underscores the ongoing challenges of managing aging dams in a changing climate.
Year Completed |
1883 |
Dam Length |
1500 |
Dam Height |
25 |
River Or Stream |
Rapid River |
Surface Area |
15741 |
Drainage Area |
382 |
Nid Storage |
192039 |
Outlet Gates |
Slide (sluice gate) - 2, Tainter (radial) - 1 |
Hazard Potential |
High |
Foundations |
Soil |
Nid Height |
25 |
| Location | Reservations | Toilets |
|---|---|---|
Rangeley Lake Campground
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Rangeley Lake State Park
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R26
|
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R21
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