Twin Lake-Lower
Key Takeaway
Twin Lake-Lower is classified as low hazard in Oregon. It was completed in 1908 and is 118 years old. Its primary use is irrigation.
Physical Details
| Dam Height | 22 ft (taller than 36.2% in OR) |
| Dam Length | 150 ft |
| Dam Type | Concrete |
| Max Storage | 75 acre-ft |
| Normal Storage | 75 acre-ft |
| Surface Area | 4 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 115 cfs |
| Year Completed | 1908 (118 years old) |
| NID ID | OR00610 |
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
PINE LAKES DITCH & RES. COMPANY
Private
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Low Hazard 27 ftFrequently Asked Questions
What is the hazard classification of Twin Lake-Lower?
Twin Lake-Lower 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 Twin Lake-Lower?
Twin Lake-Lower is owned by PINE LAKES DITCH & RES. COMPANY (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Twin Lake-Lower built?
Twin Lake-Lower was completed in 1908, making it 118 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 Twin Lake-Lower?
Twin Lake-Lower serves the following purposes: Irrigation. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Twin Lake-Lower?
Twin Lake-Lower has a dam height of 22 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 Twin Lake-Lower last inspected?
Twin Lake-Lower was last inspected on August 13, 2019. Inspection dates indicate when a formal review occurred, not the results of that inspection.