West Fork Big Creek Dam P- 46 Reservoir Report
Last Updated: December 18, 2025
West Fork Big Creek Dam P-46, located in the city of Pattonsburg, Missouri, is a local government-owned structure designed by the USDA NRCS and completed in 1999.
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Summary
The dam, primarily built for flood risk reduction on the TR-Polecat Creek, stands at a height of 29 feet and has a structural height of 34 feet. With a storage capacity of 141 acre-feet, the dam covers a surface area of 12 acres and serves a drainage area of 230 square miles.
This earth-type dam, with a stone core and soil foundation, features an uncontrolled spillway with a width of 20 feet. Despite being classified as having a low hazard potential and a moderate risk assessment, the condition of West Fork Big Creek Dam P-46 is currently not rated. The dam does not have any associated locks or outlet gates, and its emergency action plan status is unknown. Although it is not regulated or inspected by the state, the dam plays a crucial role in mitigating flood risks in the area and highlights the importance of sustainable water resource management in safeguarding communities from natural disasters.
Year Completed |
1999 |
Dam Length |
515 |
Dam Height |
29 |
River Or Stream |
TR-POLECAT CREEK |
Primary Dam Type |
Earth |
Surface Area |
12 |
Hydraulic Height |
29 |
Drainage Area |
230 |
Nid Storage |
141 |
Structural Height |
34 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
34 |
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.
West Fork Big Creek Dam P- 46