Union County Roadgrade Dam 29-73-29, located in Afton, Iowa, is a local government-owned structure designed by the Soil Conservation Service (SCS) and completed in 1993.
Wind
Humidity
This earth dam stands at a height of 39 feet and spans 435 feet, with a storage capacity of 59 acre-feet and a drainage area of 0.12 square miles. Situated on TR- Three Mile Creek, the dam serves a primary purpose of "Other" and is state-regulated by the Iowa Department of Natural Resources.
With a low hazard potential and a moderate risk assessment rating of 3, Union County Roadgrade Dam 29-73-29 is currently in "Not Rated" condition. While it lacks a formal Emergency Action Plan (EAP) and updated inspection dates, the dam meets state permitting and inspection requirements. The dam's spillway type is classified as "Uncontrolled," with no outlet gates or locks present. Despite its operational status, the dam's risk management measures and inundation maps have yet to be fully developed.
For water resource and climate enthusiasts, Union County Roadgrade Dam 29-73-29 presents an intriguing case study in dam infrastructure and regulation. With its unique design features and location in Union County, Iowa, this earth dam provides valuable insights into the management and assessment of water resources in the region. As efforts continue to enhance the dam's safety and emergency preparedness measures, stakeholders can track its progress towards achieving a higher condition rating and reducing potential risks associated with its operation.
Year Completed |
1993 |
Dam Length |
435 |
Dam Height |
39 |
River Or Stream |
TR- THREE MILE CREEK |
Primary Dam Type |
Earth |
Surface Area |
2 |
Drainage Area |
0.12 |
Nid Storage |
59 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
39 |
Raccoon River At Van Meter
|
1640cfs |
South Raccoon River At Redfield
|
268cfs |
Thompson River At Davis City
|
22cfs |
Raccoon River Near West Des Moines
|
1300cfs |
North River Near Norwalk
|
48cfs |
East Fork 102 River At Bedford
|
1cfs |