Twelve Mile Creek Watershed Site 58
Key Takeaway
Twelve Mile Creek Watershed Site 58 is classified as low hazard in Iowa. It was completed in 1985 and is 41 years old. Its primary use is fire protection.
Physical Details
| Dam Height | 28 ft (taller than 36.9% in IA) |
| Dam Length | 650 ft |
| Dam Type | Earth |
| Max Storage | 128 acre-ft |
| Normal Storage | 41 acre-ft |
| Surface Area | 8 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 0 cfs |
| Year Completed | 1985 (41 years old) |
| NID ID | IA02307 |
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
Union County SWCD
Local Government
Nearby Dams
Twelvemile Watershed Site D-60
Union, IA
Low Hazard 35 ftAfton Reservoir Dam
Union, IA
Significant Hazard 51 ftThree Mile Reservoir Dam
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Significant Hazard 63 ftTwelve Mile Creek Watershed Site M-1
Union, IA
High Hazard 66 ftBeattie Dam
Union, IA
Low Hazard 43 ftBeattle Dam
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Low Hazard 32 ftThree Mile Creek Watershed Site 29
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Low Hazard 33 ftUnion County Roadgrade Dam 29-73-29
Union, IA
Low Hazard 39 ftFrequently Asked Questions
What is the hazard classification of Twelve Mile Creek Watershed Site 58?
Twelve Mile Creek Watershed Site 58 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 Twelve Mile Creek Watershed Site 58?
Twelve Mile Creek Watershed Site 58 is owned by Union County SWCD (Local Government). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Twelve Mile Creek Watershed Site 58 built?
Twelve Mile Creek Watershed Site 58 was completed in 1985, making it 41 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 Twelve Mile Creek Watershed Site 58?
Twelve Mile Creek Watershed Site 58 serves the following purposes: Fire Protection, Stock, Or Small Fish Pond, Flood Risk Reduction. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Twelve Mile Creek Watershed Site 58?
Twelve Mile Creek Watershed Site 58 has a dam height of 28 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.