Stone Dam - Dike 4, located in Millinocket, Maine, on the West Branch Penobscot River, is a historic structure with a primary purpose of hydroelectric power generation.
Wind
Humidity
Built in 1900, this earth dam stands at a height of 9 feet and spans a length of 1240 feet, providing storage of up to 8100 acre-feet of water. With a surface area of 1344 acres and a drainage area of 1890 acres, Stone Dam - Dike 4 plays a crucial role in flood risk reduction, water supply, recreation, and fish and wildlife habitat maintenance.
Despite its age, Stone Dam - Dike 4 has a low hazard potential, according to the Federal Energy Regulatory Commission. While the condition assessment is not currently available, the dam undergoes inspections every three years, with the last one conducted in August 2019. Although there are no outlet gates or spillway, the structure has a spillway width of 0 and a maximum discharge of 0. With its risk assessment rated as high (2), Stone Dam - Dike 4 is closely monitored and managed to ensure its safety and functionality for the surrounding community and environment.
In conclusion, Stone Dam - Dike 4 stands as a testament to early engineering ingenuity, serving as a vital component in water resource management and climate resilience efforts in the Penobscot County area. As a key player in the region's hydroelectric infrastructure, this historic dam continues to play a significant role in balancing multiple purposes, from flood control to recreation, highlighting the importance of sustainable water resource development in the face of changing climate conditions.
Year Completed |
1900 |
Dam Length |
1240 |
Dam Height |
9 |
River Or Stream |
West Branch Penobscot River |
Surface Area |
1344 |
Drainage Area |
1890 |
Nid Storage |
8100 |
Hazard Potential |
Low |
Nid Height |
9 |
East Branch Penobscot River At Grindstone
|
943cfs |
Mattawamkeag River Near Mattawamkeag
|
1130cfs |
Piscataquis River At Medford
|
880cfs |
Penobscot River At West Enfield
|
16000cfs |
Seboeis River Near Shin Pond
|
156cfs |
Piscataquis River Near Dover-Foxcroft
|
2180cfs |
| Location | Reservations | Toilets |
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Remote Site 5K
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Remote Site 5J
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Remote Site 4I
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Remote Sit 3G
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Remote Site 3H
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Remote Site 2F
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