Moulton Watershed Site B-9 Reservoir Report
Last Updated: December 7, 2025
Moulton Watershed Site B-9, located in Sedan, Iowa, is a key flood risk reduction structure managed by the local government and regulated by the Iowa Department of Natural Resources.
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Summary
Designed by USDA NRCS, USDA SCS & CO Engineer, this earth dam stands at a height of 22 feet and was completed in 1963 to protect the surrounding area from potential flooding along the TR-Chariton River. With a storage capacity of 61 acre-feet and a drainage area of 0.22 square miles, this structure plays a vital role in managing water resources in the region.
Despite being classified as having a low hazard potential and a moderate risk assessment, Moulton Watershed Site B-9 has not been rated for its current condition. The dam's spillway type is uncontrolled, and it has not been modified in recent years. Located in Appanoose County, this structure covers a surface area of 3 acres and serves as a critical component of the local water management system. With its primary purpose being flood risk reduction, this dam plays a crucial role in safeguarding the community against potential water-related disasters.
While Moulton Watershed Site B-9 has not been inspected or assessed for its emergency action plan readiness, it remains a key infrastructure for water resource management in the region. With its historical significance dating back to the 1960s, this earth dam continues to provide essential flood protection for the residents of Sedan, Iowa, and underscores the importance of proactive water resource planning and management in the face of changing climate patterns.
Year Completed |
1963 |
Dam Length |
437 |
Dam Height |
22 |
River Or Stream |
TR-CHARITON RIVER |
Primary Dam Type |
Earth |
Surface Area |
3 |
Drainage Area |
0.22 |
Nid Storage |
61 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
22 |
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.
Moulton Watershed Site B-9