West Fork Big Creek Dam B-113a Reservoir Report
Last Updated: December 17, 2025
West Fork Big Creek Dam B-113a, located in Harrison County, Missouri, is a key structure designed by the USDA NRCS for flood risk reduction along the West Fork Big Creek.
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Summary
Completed in 1994, this earthen dam stands at a height of 30.1 feet and has a structural height of 32 feet. With a storage capacity of 130 acre-feet and a maximum discharge of 366 cubic feet per second, the dam serves to protect the surrounding area from potential flooding events.
Although the dam is classified as having a low hazard potential and is currently in "Not Rated" condition, it plays a crucial role in managing water resources in the region. The dam's primary purpose is flood risk reduction, and it serves as a vital infrastructure safeguarding against potential disasters. With a moderate risk assessment score of 3, ongoing risk management measures are essential to ensure the dam's continued effectiveness in protecting the community.
Despite not being regulated by the state, West Fork Big Creek Dam B-113a remains a significant asset in the area's water resource management efforts. As part of the Rock Island District, the dam's uncontrolled spillway and lack of outlet gates highlight the importance of regular inspections and maintenance to uphold its functionality. With its strategic location and role in flood risk reduction, this dam underscores the critical intersection of water resources and climate resilience in the region.
Year Completed |
1994 |
Dam Length |
450 |
Dam Height |
30.1 |
River Or Stream |
TR-WEST FORK BIG CREEK |
Primary Dam Type |
Earth |
Surface Area |
8 |
Hydraulic Height |
30 |
Drainage Area |
850 |
Nid Storage |
130 |
Structural Height |
32 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
32 |
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-113a