Wayne County Roadgrade Dam 26-70-22 Reservoir Report
Last Updated: December 7, 2025
Wayne County Roadgrade Dam 26-70-22, located in Rathbun Reservoir, Iowa, is a local government-owned structure with a primary purpose of providing water resource management.
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Summary
Built in 2001 by the Wayne County Engineer, this earth dam stands at a height of 28 feet and spans 450 feet in length, with a storage capacity of 70 acre-feet. Situated on the TR- South Fork Chariton River, the dam is regulated by the Iowa Department of Natural Resources and undergoes regular inspections to ensure its structural integrity.
Despite being classified as having a low hazard potential, Wayne County Roadgrade Dam 26-70-22 is considered to have a moderate risk level due to various factors such as its condition assessment being not rated. The dam's emergency action plan status and risk management measures are currently unknown, highlighting the importance of further assessment and potential updates to ensure the safety and effectiveness of this critical infrastructure. With a surface area of 3.7 acres and a drainage area of 0.38 square miles, the dam plays a crucial role in managing water flow and mitigating flood risks in the region.
As an essential component of the water resource management system in Wayne County, Iowa, Wayne County Roadgrade Dam 26-70-22 serves as a key structure for regulating water levels and protecting the surrounding area from potential flooding. With its location in the Rock Island District and under the jurisdiction of the Iowa DNR, this dam represents a vital piece of infrastructure that requires ongoing monitoring and maintenance to ensure its continued functionality and safety for the local community and environment.
Year Completed |
2001 |
Dam Length |
450 |
Dam Height |
28 |
River Or Stream |
TR- SOUTH FORK CHARITON RIVER |
Primary Dam Type |
Earth |
Surface Area |
3.7 |
Drainage Area |
0.38 |
Nid Storage |
70 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
28 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Dam Data Reference
Condition Assessment
SatisfactoryNo existing or potential dam safety deficiencies are recognized. Acceptable performance is expected under all loading conditions (static, hydrologic, seismic) in accordance with the minimum applicable state or federal regulatory criteria or tolerable risk guidelines.
Fair
No existing dam safety deficiencies are recognized for normal operating conditions. Rare or extreme hydrologic and/or seismic events may result in a dam safety deficiency. Risk may be in the range to take further action. Note: Rare or extreme event is defined by the regulatory agency based on their minimum
Poor A dam safety deficiency is recognized for normal operating conditions which may realistically occur. Remedial action is necessary. POOR may also be used when uncertainties exist as to critical analysis parameters which identify a potential dam safety deficiency. Investigations and studies are necessary.
Unsatisfactory
A dam safety deficiency is recognized that requires immediate or emergency remedial action for problem resolution.
Not Rated
The dam has not been inspected, is not under state or federal jurisdiction, or has been inspected but, for whatever reason, has not been rated.
Not Available
Dams for which the condition assessment is restricted to approved government users.
Hazard Potential Classification
HighDams assigned the high hazard potential classification are those where failure or mis-operation will probably cause loss of human life.
Significant
Dams assigned the significant hazard potential classification are those dams where failure or mis-operation results in no probable loss of human life but can cause economic loss, environment damage, disruption of lifeline facilities, or impact other concerns. Significant hazard potential classification dams are often located in predominantly rural or agricultural areas but could be in areas with population and significant infrastructure.
Low
Dams assigned the low hazard potential classification are those where failure or mis-operation results in no probable loss of human life and low economic and/or environmental losses. Losses are principally limited to the owner's property.
Undetermined
Dams for which a downstream hazard potential has not been designated or is not provided.
Not Available
Dams for which the downstream hazard potential is restricted to approved government users.
Wayne County Roadgrade Dam 26-70-22
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