The primary purpose of this hydroelectric reservoir is evident in its design, with a dam height of 14 feet and a length of 565 feet, providing a storage capacity of 8081 acre-feet. The lake covers a surface area of 1075 acres and has a drainage area of 16 square miles, making it a significant contributor to the local ecosystem and water supply.
Managed by the Federal Energy Regulatory Commission, Penobscot Lake plays a crucial role in supporting fish and wildlife habitats, in addition to its hydroelectric functions. Despite its low hazard potential, the lake is subject to regular inspections and a risk assessment rating of 2, indicating a moderate level of risk. Emergency action plans are in place, with contact information updated periodically to ensure the safety and security of the surrounding communities in the event of any unforeseen incidents.
With its concrete, earth, and gravity dam types, Penobscot Lake stands as a prime example of sustainable water resource management in Maine. Its strategic location and operational efficiency make it a valuable asset for both environmental conservation and renewable energy production, serving as a beacon for water resource and climate enthusiasts alike.
Year Completed |
1916 |
Dam Length |
565 |
Dam Height |
14 |
River Or Stream |
Penobscot Brook |
Surface Area |
1075 |
Drainage Area |
16 |
Nid Storage |
8081 |
Outlet Gates |
Slide (sluice gate) - 2 |
Hazard Potential |
Low |
Foundations |
Rock |
Nid Height |
14 |
North Branch Penobscot River Nr Pittston Farm
|
199cfs |
Kennebec River At The Forks
|
865cfs |
Spencer Stream At Mouth
|
104cfs |
Dead River Near Dead River
|
791cfs |
Piscataquis River At Blanchard
|
67cfs |
St. John River At Ninemile Bridge
|
843cfs |