West Fork Big Creek Dam B-58 Reservoir Report
Last Updated: December 12, 2025
West Fork Big Creek Dam B-58, located in Harrison, Missouri, was completed in 2010 by the USDA NRCS and serves as a critical flood risk reduction structure along the West Fork Big Creek.
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Summary
This earth dam stands at a height of 25 feet and has a structural height of 31 feet, with a total length of 550 feet. With a storage capacity of 155.8 acre-feet, the dam helps to protect the surrounding area from potential flooding events, making it an essential asset for water resource management in the region.
Despite being privately owned, the dam has been designated as having a low hazard potential and a moderate risk assessment rating. The spillway type is uncontrolled with a width of 40 feet, allowing for excess water to safely flow out of the reservoir during periods of heavy rainfall. The dam's primary purpose is flood risk reduction, and it plays a crucial role in safeguarding the local community from the impacts of extreme weather events. With a drainage area of 1051 square miles, the dam helps to regulate water flow and mitigate the risk of downstream flooding.
Overall, West Fork Big Creek Dam B-58 is an important infrastructure project that contributes to the resilience of the region's water resources and climate adaptation efforts. As a key component of the flood risk reduction system, the dam showcases the collaboration between private ownership and government agencies in addressing water management challenges. With a focus on safety and risk management, this dam plays a vital role in protecting the community and enhancing the overall water resource infrastructure in Harrison, Missouri.
Year Completed |
2010 |
Dam Length |
550 |
Dam Height |
25 |
River Or Stream |
WEST FORK BIG CREEK |
Primary Dam Type |
Earth |
Surface Area |
16 |
Hydraulic Height |
25 |
Drainage Area |
1051 |
Nid Storage |
155.8 |
Structural Height |
31 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
31 |
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.
West Fork Big Creek Dam B-58