Twelve Mile Creek Watershed Site D-35 is an earth dam located in Union County, Iowa, built in 1988. It carries a Low hazard potential classification.
Dam profile
NID height · 38 ft38 ft tall and 825 ft long, taller than 84% 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 D-35
The primary purpose of Twelve Mile Creek Watershed Site D-35 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 38 feet tall and stretches 825 feet across, creates a reservoir covering 20 acres, has a maximum storage capacity of 530 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 1988, the structure is 38 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 38 feet, this dam is taller than 84% of dams nationwide.
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Location
| State | Iowa |
| County | Union |
| Nearest City | Westerville |
| River/Stream | Tr- Twelve Mile Creek |
| Coordinates | 40.97790, -94.13590 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 38 ft |
| Dam Height | 38 ft |
| Dam Length | 825 ft |
| Year Completed | 1988 (38 years old) |
Storage & Hydraulics
| NID Storage | 530 acre-ft |
| Max Storage | 530 acre-ft |
| Normal Storage | 140 acre-ft |
| Surface Area | 20 acres |
| Drainage Area | 1 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 | IA02490 |
| Federal ID | IA02490 |
| More Info | State Dam Safety Program |