South Fork Blackwater River Dam E-26 Reservoir Report
Last Updated: December 6, 2025
South Fork Blackwater River Dam E-26, located in Warrensburg, Missouri, was completed in 1965 by the USDA NRCS and serves as a Grade Stabilization structure along the TR-W.BR.S.FK.BLACKWATER waterway.
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Summary
This earth dam stands at a height of 22 feet with a structural height of 24 feet, spanning a length of 870 feet. With a storage capacity of 98 acre-feet and a drainage area of 761.6 square miles, the dam plays a crucial role in managing water flow and preventing erosion in the area.
Despite being classified as low hazard potential, the dam's risk assessment is rated as moderate (3), highlighting the importance of regular inspections and maintenance. Currently, the condition of the dam is not rated, and an Emergency Action Plan (EAP) has not been prepared. With a spillway width of 30 feet and a maximum discharge capacity of 200 cubic feet per second, the dam is equipped to handle excess water flow during heavy rainfall events. Although there are no associated locks or outlet gates, the dam serves as a key infrastructure for managing water resources in the region.
South Fork Blackwater River Dam E-26 is a vital structure for grade stabilization along the Blackwater River tributary. Owned by the local government and designed by USDA NRCS, the dam plays a crucial role in managing water flow and preventing erosion in the Johnson County area. With its moderate risk assessment and low hazard potential, regular inspections and maintenance are essential to ensure the continued effectiveness and safety of this important water resource infrastructure.
Year Completed |
1965 |
Dam Length |
870 |
Dam Height |
22 |
River Or Stream |
TR-W.BR.S.FK.BLACKWATER |
Primary Dam Type |
Earth |
Surface Area |
1 |
Hydraulic Height |
22 |
Drainage Area |
761.6 |
Nid Storage |
98 |
Structural Height |
24 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
24 |
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.
South Fork Blackwater River Dam E-26