Hiatt Dam Reservoir Report
Last Updated: December 11, 2025
Hiatt Dam, located in Macon, Missouri, along the TR-East Fork Little Chariton River, is a privately owned earth dam designed by the USDA NRCS for the primary purpose of grade stabilization.
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Summary
Completed in 2003, this dam stands at 31 feet tall with a hydraulic height of 24 feet and a length of 450 feet. With a maximum storage capacity of 47 acre-feet and a normal storage of 37 acre-feet, the dam serves to control the flow of water in the area while also providing some flood protection.
The dam features an uncontrolled spillway with a width of 10 feet and has a low hazard potential. Despite not being rated for its condition assessment, the risk assessment for Hiatt Dam is moderate. The dam has not been inspected since September 2003, but it is noted that there are no outlet gates associated with the structure. While the dam does not fall under state jurisdiction for regulation, inspection, or enforcement, it plays a crucial role in managing water resources in the region and contributes to the overall climate resilience of the area.
Overall, Hiatt Dam is a vital infrastructure for water resource management in Macon, Missouri, serving the community by providing grade stabilization and moderate flood protection along the TR-East Fork Little Chariton River. With a focus on maintaining its structural integrity and monitoring its risk assessment, the dam continues to play a significant role in the local water management system. As water resource and climate enthusiasts, understanding the details of this earth dam's design, purpose, and capacity can deepen appreciation for the essential role it plays in the region's hydrological landscape.
Year Completed |
2003 |
Dam Length |
450 |
Dam Height |
26 |
River Or Stream |
TR-EAST FORK LITTLE CHARITON |
Primary Dam Type |
Earth |
Surface Area |
2 |
Hydraulic Height |
24 |
Drainage Area |
64 |
Nid Storage |
47 |
Structural Height |
31 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
31 |
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.
Hiatt Dam