Upper Locust Creek L-140 Reservoir Report
Last Updated: December 12, 2025
Upper Locust Creek L-140 is a significant earth dam located in Putnam, Missouri, serving the primary purpose of flood risk reduction along the TR-East Fork Locust Creek.
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Summary
Built in 1994 by the USDA NRCS, this dam stands at a height of 24.9 feet and has a hydraulic height of 24 feet, with a maximum storage capacity of 61 acre-feet. With a low hazard potential and a moderate risk assessment rating, this structure plays a crucial role in protecting the surrounding area from potential flooding events.
Managed by the local government, Upper Locust Creek L-140 is designed to handle a maximum discharge of 109 cubic feet per second, with a spillway type of uncontrolled and a spillway width of 20 feet. The dam covers a surface area of 6 acres and drains a watershed area of 160 acres. Despite not being state regulated, inspected, or enforced, this dam remains a key component in the community's flood risk management strategy, providing essential protection against potential inundation.
With a stone core and soil foundation, Upper Locust Creek L-140 has not been rated for its condition assessment and does not have an Emergency Action Plan in place. However, it meets the guidelines for risk assessment and management, ensuring that the structure is effectively maintained and monitored for any potential issues that may arise. For water resource and climate enthusiasts, this dam serves as a valuable asset in safeguarding the local area from the impacts of flooding, showcasing the importance of resilient infrastructure in the face of changing environmental conditions.
Year Completed |
1994 |
Dam Length |
440 |
Dam Height |
24.9 |
River Or Stream |
TR-EAST FORK LOCUST CREEK |
Primary Dam Type |
Earth |
Surface Area |
6 |
Hydraulic Height |
24 |
Drainage Area |
160 |
Nid Storage |
61 |
Structural Height |
26 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
26 |
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.
Upper Locust Creek L-140