Located in Union County, Iowa, the Three Mile Creek Watershed Site U-7 is a crucial water resource managed by the local government for fire protection, stock, and small fish pond purposes.
Wind
Humidity
Built in 1980 by the USDA NRCS, this earth dam stands at a height of 27 feet and spans 450 feet in length, with a storage capacity of 137 acre-feet. Despite its low hazard potential and moderate risk assessment, the dam has not been rated for its condition and lacks an emergency action plan.
The dam's primary purpose of flood risk reduction underscores its importance in mitigating potential water-related disasters in the region. Managed by the Iowa DNR, the dam is subject to state regulation, permitting, inspection, and enforcement to ensure its structural integrity and safety. With a drainage area of 0.4 square miles and a surface area of 3.5 acres, the dam plays a vital role in managing water flow and protecting the surrounding environment and communities from flooding events.
As part of the Rock Island District, the Three Mile Creek Watershed Site U-7 serves as a key water management infrastructure in the area, contributing to the overall resilience of the watershed and ecosystem. Despite its age, the dam continues to provide essential water resource services while highlighting the importance of ongoing monitoring, maintenance, and emergency preparedness to safeguard against potential risks and ensure sustainable water management practices in the region.
Year Completed |
1980 |
Dam Length |
450 |
Dam Height |
27 |
River Or Stream |
TR-THREE MILE CREEK |
Primary Dam Type |
Earth |
Surface Area |
3.5 |
Drainage Area |
0.4 |
Nid Storage |
137 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
27 |
Raccoon River At Van Meter
|
1640cfs |
South Raccoon River At Redfield
|
268cfs |
Raccoon River Near West Des Moines
|
1300cfs |
North River Near Norwalk
|
48cfs |
Middle Raccoon River At Panora
|
92cfs |
East Fork 102 River At Bedford
|
1cfs |