Mississippi Lime South 40 Dam Reservoir Report
Last Updated: January 11, 2026
The Mississippi Lime South 40 Dam, located in Valle Spring, Missouri, is a privately-owned structure regulated by the state's Dam and Reservoir Safety Program.
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Summary
Built by designer Jeff Schauer, this earth and stone dam stands at a height of 50 feet and stretches 2900 feet in length. It serves as a crucial barrier on an unknown tributary, with a storage capacity of 670 acre-feet and a maximum discharge of 485 cubic feet per second.
Despite its satisfactory condition assessment, the dam poses a high hazard potential due to its uncontrolled spillway and outlet gates. Regular inspections are conducted, with the last one taking place in December 2017. The risk assessment deems it as moderate (3), prompting the need for ongoing risk management measures. With its essential role in water resource management, the Mississippi Lime South 40 Dam stands as a testament to the importance of infrastructure in safeguarding against climate-related challenges.
Dam Length |
2900 |
Dam Height |
50 |
River Or Stream |
UNKNOWN TRIBUTARY |
Surface Area |
33 |
Hydraulic Height |
50 |
Drainage Area |
50 |
Nid Storage |
670 |
Structural Height |
50 |
Outlet Gates |
Uncontrolled |
Hazard Potential |
High |
Foundations |
Unlisted/Unknown |
Nid Height |
50 |
Seasonal Comparison
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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.
Mississippi Lime South 40 Dam