Twin Branch
Key Takeaway
Twin Branch is classified as high hazard in Indiana. It was completed in 1903 and is 123 years old. Its primary use is hydroelectric. High hazard means loss of life is likely if the dam fails — it does not indicate the dam's current condition. Learn more.
Physical Details
| Dam Height | 41 ft (taller than 87.2% in IN) |
| Dam Length | 946 ft |
| Dam Type | Gravity |
| Max Storage | 10.0K acre-ft |
| Normal Storage | 9.7K acre-ft |
| Surface Area | 1,065 acres |
| Drainage Area | 3,530 sq mi |
| Max Discharge | 37,600 cfs |
| Year Completed | 1903 (123 years old) |
| NID ID | IN03011 |
Safety Information
Loss of human life is likely if the dam fails.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
Indiana & Michigan Power Company
Public Utility
Nearby Dams
Frequently Asked Questions
What is the hazard classification of Twin Branch?
Twin Branch is classified as High Hazard. Loss of human life is likely if the dam fails. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates Twin Branch?
Twin Branch is owned by Indiana & Michigan Power Company (Public Utility). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Twin Branch built?
Twin Branch was completed in 1903, making it 123 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 Branch?
Twin Branch serves the following purposes: Hydroelectric. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Twin Branch?
Twin Branch has a dam height of 41 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 Branch last inspected?
Twin Branch was last inspected on September 8, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.