Twelve Mile Creek Watershed Site 58 is an earth dam located in Union County, Iowa, built in 1985. It carries a Low hazard potential classification.
Dam profile
NID height · 28 ft28 ft tall and 650 ft long, taller than 62% of U.S. dams with a recorded height. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic embankment section and the water level is illustrative.
About Twelve Mile Creek Watershed Site 58
The primary purpose of Twelve Mile Creek Watershed Site 58 is fire protection, stock, or small fish pond. The dam maintains a small impoundment used for fire suppression, livestock watering, or as a fish pond. The dam is owned by Union County Swcd (local government). It impounds the Tr- Twelve Mile Cr. near Afton.
The dam stands 28 feet tall and stretches 650 feet across, creates a reservoir covering 8 acres, has a maximum storage capacity of 128 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1985, the structure is 41 years old.
This dam has a low hazard potential classification, meaning that failure would cause minimal damage, limited primarily to the dam owner's property, with no expected loss of life.
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Location
| State | Iowa |
| County | Union |
| Nearest City | Afton |
| River/Stream | Tr- Twelve Mile Cr. |
| Coordinates | 41.05170, -94.22710 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 28 ft |
| Dam Height | 28 ft |
| Dam Length | 650 ft |
| Year Completed | 1985 (41 years old) |
Storage & Hydraulics
| NID Storage | 128 acre-ft |
| Max Storage | 128 acre-ft |
| Normal Storage | 41 acre-ft |
| Surface Area | 8 acres |
| Drainage Area | 0 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Fire Protection, Stock, Or Small Fish Pond |
| Owner | Union County Swcd |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | IA02307 |
| Federal ID | IA02307 |
| More Info | State Dam Safety Program |