Pony Creek Watershed Site 21, located in Mills County, Iowa, is a local government-owned earth dam constructed in 1971 by the USDA NRCS for flood risk reduction along Pony Creek.
Wind
Humidity
The dam stands at a height of 75 feet and has a storage capacity of 3,660 acre-feet, serving a drainage area of 13.84 square miles. With a surface area of 83.2 acres, the dam plays a crucial role in mitigating flood risks in the region.
Managed by the Iowa DNR, Pony Creek Watershed Site 21 is classified as a high hazard potential dam with a satisfactory condition assessment as of August 2019. Despite its moderate risk assessment rating, the dam has not undergone any modifications in recent years and is inspected biennially to ensure its structural integrity and functionality. The dam's spillway, with a width of 4 feet, is uncontrolled, posing potential risks during high discharge events.
For water resource and climate enthusiasts, Pony Creek Watershed Site 21 serves as a vital infrastructure for flood risk reduction and water management in the region. As part of the larger Pony Creek watershed, this dam contributes to the overall resilience of the area against flooding events and provides essential protection to downstream communities. Its role in safeguarding the local ecosystem and infrastructure underscores the importance of continued monitoring and maintenance to ensure its effectiveness in the face of changing climate patterns.
Year Completed |
1971 |
Dam Length |
968 |
Dam Height |
75 |
River Or Stream |
PONY CREEK |
Primary Dam Type |
Earth |
Surface Area |
83.2 |
Drainage Area |
13.84 |
Nid Storage |
3660 |
Hazard Potential |
High |
Foundations |
Soil |
Nid Height |
75 |
Missouri River At Omaha
|
17500cfs |
West Nishnabotna River At Randolph
|
508cfs |
Platte R At Louisville Ne
|
4750cfs |
Weeping Water Creek At Union
|
20cfs |
Big Papillion Cr
|
38cfs |
Missouri River At Nebraska City
|
23700cfs |
| Location | Reservations | Toilets |
|---|---|---|
Pony Creek Co Park
|
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Glenwood Lake Park
|
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FAMCamp
|
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Offutt AFB Military
|
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Haworth City Park - Bellevue
|
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Camp Wakonda
|