Lock
Key Takeaway
Lock is classified as low hazard in Maine. It was completed in 1875 and is 151 years old. Its primary use is hydroelectric.
Physical Details
| Dam Height | 15 ft (taller than 51.7% in ME) |
| Dam Length | 280 ft |
| Dam Type | Timber Crib |
| Max Storage | 105.2K acre-ft |
| Normal Storage | 101.0K acre-ft |
| Surface Area | 11,200 acres |
| Drainage Area | 204 sq mi |
| Year Completed | 1875 (151 years old) |
| NID ID | ME00198 |
Safety Information
No probable loss of human life and low economic/environmental losses expected.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
BPL, DOC/State of Maine (Allagash Wilderness Waterway)
State Government
Nearby Dams
Frequently Asked Questions
What is the hazard classification of Lock?
Lock is classified as Low Hazard. No probable loss of human life and low economic/environmental losses expected. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates Lock?
Lock is owned by BPL, DOC/State of Maine (Allagash Wilderness Waterway) (State Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Lock built?
Lock was completed in 1875, making it 151 years old. Many U.S. dams were built between the 1930s and 1970s during a period of major infrastructure investment.
What is the primary purpose of Lock?
Lock serves the following purposes: Hydroelectric, Flood Risk Reduction. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Lock?
Lock has a dam height of 15 ft. Dam height is measured from the natural streambed at the downstream toe to the top of the dam, and may differ from the visible height.
When was Lock last inspected?
Lock was last inspected on November 7, 2007. Inspection dates indicate when a formal review occurred, not the results of that inspection.