West Fork Big Creek Dam B-166 Reservoir Report
Last Updated: December 19, 2025
West Fork Big Creek Dam B-166, located in Pattonsburg, Missouri, is a flood risk reduction structure constructed in 1999 by the USDA NRCS.
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Summary
This Earth dam, with a height of 26 feet and a length of 730 feet, serves to protect the surrounding area from potential flooding events. The dam has a normal storage capacity of 26 acre-feet and a maximum storage of 109 acre-feet, with a drainage area of 90 square miles.
The dam is designed with a stone core and soil foundation, and features an uncontrolled spillway with a width of 30 feet. Despite being classified with a low hazard potential, the dam's risk assessment is moderate (3). While the dam itself is not regulated by the state of Missouri, it is owned and operated by the local government in Harrison County. With its strategic location along the TR-NOBEL BRANCH river, West Fork Big Creek Dam B-166 plays a crucial role in managing water resources and mitigating flood risks in the region.
Enthusiasts of water resource management and climate resilience will appreciate the importance of West Fork Big Creek Dam B-166 in safeguarding the community from potential flooding events. As a key infrastructure project in flood risk reduction, the dam stands as a testament to the collaborative efforts of the USDA NRCS and local government in protecting the area. With its capacity to store and manage water flow, this Earth dam serves as a vital component in the region's overall water resource infrastructure, contributing to the resilience of the surrounding ecosystem and community.
Year Completed |
1999 |
Dam Length |
730 |
Dam Height |
26 |
River Or Stream |
TR-NOBEL BRANCH |
Primary Dam Type |
Earth |
Surface Area |
4 |
Hydraulic Height |
25 |
Drainage Area |
90 |
Nid Storage |
109 |
Structural Height |
30 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
30 |
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 B-166