Twelve Mile Creek Watershed Site 18 is an earth dam located in Union County, Iowa, built in 1986. It carries a Low hazard potential classification.
Dam profile
NID height · 36 ft36 ft tall and 510 ft long, taller than 82% 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 18
The primary purpose of Twelve Mile Creek Watershed Site 18 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 Creek near Westerville.
The dam stands 36 feet tall and stretches 510 feet across, creates a reservoir covering 8 acres, has a maximum storage capacity of 190 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1986, the structure is 40 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.
At 36 feet, this dam is taller than 82% of dams nationwide.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Iowa |
| County | Union |
| Nearest City | Westerville |
| River/Stream | Tr-twelve Mile Creek |
| Coordinates | 40.93460, -94.10040 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 36 ft |
| Dam Height | 36 ft |
| Dam Length | 510 ft |
| Year Completed | 1986 (40 years old) |
Storage & Hydraulics
| NID Storage | 190 acre-ft |
| Max Storage | 190 acre-ft |
| Normal Storage | 63 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 | IA02341 |
| Federal ID | IA02341 |
| More Info | State Dam Safety Program |