Upper Locust Creek L-146a Reservoir Report
Last Updated: December 12, 2025
Upper Locust Creek L-146a is a flood risk reduction dam located in Putnam, Missouri, near the city of REGER.
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Summary
Constructed in 2008 by the USDA NRCS, this earth dam stands at a height of 24 feet and has a hydraulic height of 23 feet. With a capacity of 92.8 acre-feet and a normal storage level of 27 feet, the dam serves multiple purposes including fire protection, stock or small fish pond, fish and wildlife pond, and flood risk reduction.
The dam, built primarily for flood risk reduction, spans 455 feet in length and covers a surface area of 6 acres. It is equipped with an uncontrolled spillway that is 20 feet wide, allowing for a maximum discharge of 175.4 cubic feet per second. The hazard potential of the dam is rated as low, and its condition assessment remains unrated. While it does not currently have an Emergency Action Plan in place, the risk assessment for Upper Locust Creek L-146a is deemed moderate.
Overall, Upper Locust Creek L-146a serves as a vital infrastructure for the local community, providing protection against potential flooding events and serving various other purposes such as wildlife conservation and fire protection. Its strategic location in the Rock Island District of Missouri makes it an essential component of water resource management in the region, highlighting the importance of sustainable infrastructure development in combating climate challenges.
Year Completed |
2008 |
Dam Length |
455 |
Dam Height |
24 |
River Or Stream |
TR-LOCUST CREEK |
Primary Dam Type |
Earth |
Surface Area |
6 |
Hydraulic Height |
23 |
Drainage Area |
223 |
Nid Storage |
92.8 |
Structural Height |
29 |
Outlet Gates |
Uncontrolled |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
29 |
Seasonal Comparison
Weather Forecast
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-146a