South Fork Blackwater River Dam Lt-67 Reservoir Report
Last Updated: December 6, 2025
The South Fork Blackwater River Dam Lt-67 is a privately owned earth dam located in Warrensbury, Missouri.
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Summary
Built in 1984 by the USDA NRCS, this dam serves the primary purpose of grade stabilization along the TR-S.FK. Blackwater River. Standing at a height of 36 feet and a length of 350 feet, it has a storage capacity of 74 acre-feet and covers a surface area of 26 acres.
Despite its low hazard potential, the dam is considered to have a moderate risk level and has not been rated for its condition assessment. It features an uncontrolled spillway with a width of 25 feet and has no outlet gates. The dam's risk management measures and emergency action plan are currently not specified, indicating a need for further assessment and preparedness. With a drainage area of 170 square miles, the South Fork Blackwater River Dam Lt-67 plays a critical role in managing water resources in the region.
Although not regulated or inspected by the state, the South Fork Blackwater River Dam Lt-67 remains an important structure for grade stabilization and water management in Johnson County, Missouri. Its presence highlights the importance of maintaining and monitoring dams to ensure their safety and efficacy in mitigating risks associated with potential flooding events and other water resource challenges.
Year Completed |
1984 |
Dam Length |
350 |
Dam Height |
34 |
River Or Stream |
TR-S.FK. BLACKWATER |
Primary Dam Type |
Earth |
Surface Area |
26 |
Hydraulic Height |
34 |
Drainage Area |
170 |
Nid Storage |
74 |
Structural Height |
36 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
36 |
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 Lt-67