Prairie Trail Development - South Dam is an earth dam located in Polk County, Iowa, built in 2008. It carries a Significant hazard potential classification.
Dam profile
NID height · 31 ft31 ft tall and 610 ft long, taller than 72% 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 Prairie Trail Development - South Dam
The primary purpose of Prairie Trail Development - South Dam 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 Ankeny & Dra Properties (local government). It impounds the Tr- Saylor Creek near Ankeny.
The dam stands 31 feet tall and stretches 610 feet across, creates a reservoir covering 5 acres, has a maximum storage capacity of 114 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 2008, the structure is relatively new.
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.
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Location
| State | Iowa |
| County | Polk |
| Nearest City | Ankeny |
| River/Stream | Tr- Saylor Creek |
| Coordinates | 41.71010, -93.61920 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 31 ft |
| Dam Height | 31 ft |
| Dam Length | 610 ft |
| Year Completed | 2008 (18 years old) |
Storage & Hydraulics
| NID Storage | 114 acre-ft |
| Max Storage | 114 acre-ft |
| Normal Storage | 46 acre-ft |
| Surface Area | 5 acres |
| Drainage Area | 1 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | City of Ankeny & Dra Properties |
| Owner Type | Local Government |
| Hazard Classification | Significant |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | IA03904 |
| Federal ID | IA03904 |
| More Info | State Dam Safety Program |