West Fork Big Creek Dam B-105 Reservoir Report
Last Updated: December 16, 2025
West Fork Big Creek Dam B-105, located in Harrison, Missouri, was completed in 1992 with a primary purpose of flood risk reduction.
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Summary
This earth dam stands at a height of 35 feet and has a length of 430 feet, with a storage capacity of 54 acre-feet. The dam is owned by the local government and designed by the USDA NRCS, with no state regulation or permitting required.
The dam's low hazard potential and moderate risk assessment make it a crucial structure in managing water resources in the area. With a drainage area of 135 square miles and a maximum discharge of 213 cubic feet per second, the dam plays a vital role in protecting the surrounding community from potential flood events. Despite its condition being not rated and lacking an emergency action plan, the West Fork Big Creek Dam B-105 stands as a testament to effective flood risk reduction efforts in the region.
As water resource and climate enthusiasts, the West Fork Big Creek Dam B-105 offers a fascinating case study in dam infrastructure and flood management. With its uncontrolled spillway, earth dam construction, and stone core design, this structure showcases the importance of proactive measures in mitigating flood risks. Its location in the Rock Island District and close proximity to the West Fork Big Creek highlights the interconnectedness of water resources and the environment. Overall, the West Fork Big Creek Dam B-105 serves as a critical asset in safeguarding the community against potential flood events and underscores the importance of sustainable water resource management practices.
Year Completed |
1992 |
Dam Length |
430 |
Dam Height |
35 |
River Or Stream |
TR-WEST FORK BIG CREEK |
Primary Dam Type |
Earth |
Surface Area |
5 |
Hydraulic Height |
35 |
Drainage Area |
135 |
Nid Storage |
54 |
Structural Height |
35 |
Outlet Gates |
None |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
35 |
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-105