Soap Creek Watershed Site 90-79b is an earth dam located in Wapello County, Iowa, built in 2007. It carries a Low hazard potential classification.
Dam profile
NID height · 38 ft38 ft tall and 535 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 Soap Creek Watershed Site 90-79b
The primary purpose of Soap Creek Watershed Site 90-79b is flood risk reduction. The dam is designed to control downstream flooding by temporarily storing excess water during storms and releasing it at a controlled rate. The dam is owned by Soap Creek Watershed Board (local government). It impounds the Tr-brush Creek near Selma.
The dam stands 38 feet tall and stretches 535 feet across, creates a reservoir covering 18 acres, has a maximum storage capacity of 484 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 2007, the structure is relatively new.
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 | Wapello |
| Nearest City | Selma |
| River/Stream | Tr-brush Creek |
| Coordinates | 40.91610, -92.56220 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 38 ft |
| Dam Height | 38 ft |
| Dam Length | 535 ft |
| Year Completed | 2007 (19 years old) |
Storage & Hydraulics
| NID Storage | 484 acre-ft |
| Max Storage | 484 acre-ft |
| Normal Storage | 95 acre-ft |
| Surface Area | 18 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 446 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Soap Creek Watershed Board |
| Owner Type | Local Government |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | IA04021 |
| Federal ID | IA04021 |
| More Info | State Dam Safety Program |