Se Des Moines Stormwater Det. Dam #4 is an earth dam located in Polk County, Iowa, built in 1999. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
Dam profile
NID height · 26 ft26 ft tall and 502 ft long, taller than 55% 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 Se Des Moines Stormwater Det. Dam #4
The primary purpose of Se Des Moines Stormwater Det. Dam #4 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 City of Des Moines (local government). It impounds the Tr- Yeader Creek near Des Moines.
The dam stands 26 feet tall and stretches 502 feet across, creates a reservoir covering 3 acres, has a maximum storage capacity of 95 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1999, the structure is 27 years old.
This dam has a significant hazard potential classification, meaning that a failure could cause significant economic damage — flooding roads, bridges, or property downstream — but is not expected to result in loss of life. Its condition is rated satisfactory, indicating no existing or potential dam safety deficiencies are recognized. The most recent inspection on record was 04/15/2024.
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Location
| State | Iowa |
| County | Polk |
| Nearest City | Des Moines |
| River/Stream | Tr- Yeader Creek |
| Coordinates | 41.52330, -93.56400 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 26 ft |
| Dam Height | 26 ft |
| Dam Length | 502 ft |
| Year Completed | 1999 (27 years old) |
Storage & Hydraulics
| NID Storage | 95 acre-ft |
| Max Storage | 95 acre-ft |
| Normal Storage | 20 acre-ft |
| Surface Area | 3 acres |
| Drainage Area | 0 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | City of Des Moines |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 04/15/2024 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | IA03229 |
| Federal ID | IA03229 |
| More Info | State Dam Safety Program |