T. Mahaffey
Key Takeaway
T. Mahaffey is classified as low hazard in South Dakota. It was completed in 1948 and is 78 years old. Its primary use is irrigation.
Physical Details
| Dam Height | 26 ft (taller than 65.2% in SD) |
| Dam Length | 550 ft |
| Dam Type | Earth |
| Max Storage | 126 acre-ft |
| Normal Storage | 93 acre-ft |
| Surface Area | 14 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 657 cfs |
| Year Completed | 1948 (78 years old) |
| NID ID | SD00395 |
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
THEODORE MAHAFFEY
Private
Nearby Dams
Frequently Asked Questions
What is the hazard classification of T. Mahaffey?
T. Mahaffey 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 T. Mahaffey?
T. Mahaffey is owned by THEODORE MAHAFFEY (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was T. Mahaffey built?
T. Mahaffey was completed in 1948, making it 78 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 T. Mahaffey?
T. Mahaffey serves the following purposes: Irrigation, Fire Protection, Stock, Or Small Fish Pond. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is T. Mahaffey?
T. Mahaffey has a dam height of 26 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 T. Mahaffey last inspected?
T. Mahaffey was last inspected on November 8, 1985. Inspection dates indicate when a formal review occurred, not the results of that inspection.