Upper Locust Creek L- 85 Reservoir Report

Last Updated: December 11, 2025

Upper Locust Creek L- 85, also known as Site L-85, is a flood risk reduction structure located in Reger, Missouri, within Putnam County.


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Summary

Built in 1991 by the USDA NRCS, this earth dam stands at a height of 30 feet and spans 440 feet in length. It serves the primary purpose of flood risk reduction along the TR-Locust Creek, with a storage capacity of 101 acre-feet and a drainage area of 55 square miles.

Despite being classified as a low hazard potential structure, Upper Locust Creek L- 85 plays a crucial role in mitigating flood risks in the area. With a maximum discharge capacity of 244 cubic feet per second and an uncontrolled spillway width of 42 feet, this dam helps to protect the surrounding community from potential flood events. The structure has not undergone a recent condition assessment, but its risk assessment remains at a moderate level, signifying the need for ongoing monitoring and maintenance to ensure its effectiveness in flood management.

Owned and operated by the local government, Upper Locust Creek L- 85 is a significant feature in the water resource management of Putnam County. With its stone core and soil foundation, this dam represents a vital investment in flood control infrastructure for the region. As water resource and climate enthusiasts, it is essential to recognize the importance of structures like Upper Locust Creek L- 85 in safeguarding communities and ecosystems against the impacts of extreme weather events.

Year Completed

1991

Dam Length

440

Dam Height

29

River Or Stream

TR-LOCUST CREEK

Primary Dam Type

Earth

Surface Area

3

Hydraulic Height

29

Drainage Area

55

Nid Storage

101

Structural Height

30

Outlet Gates

None

Hazard Potential

Low

Foundations

Soil

Nid Height

30
       
Seasonal Comparison

Weather Forecast

Dam Data Reference

Condition Assessment

Satisfactory
No 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

High
Dams 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.