West Fork Big Creek Dam B-128 Reservoir Report

Last Updated: April 27, 2026

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West Fork Big Creek Dam B-128 is a key structure located in Harrison, Missouri, designed by the USDA NRCS to serve as a flood risk reduction measure along the West Fork Big Creek.


Summary

Completed in 2002, this earth dam stands at a height of 29 feet and a length of 490 feet, with a maximum storage capacity of 72 acre-feet. Despite its relatively low hazard potential and moderate risk assessment, the dam has not been rated for its condition assessment.

Owned by the local government, this dam plays a crucial role in protecting the surrounding area from potential flooding events. With a primary purpose of flood risk reduction, it stands as a testament to the collaborative efforts between federal agencies like the Natural Resources Conservation Service and state regulators to safeguard communities and land from water-related disasters. The dam's uncontrolled spillway and low-risk status highlight its importance in managing water resources and mitigating climate-related risks in the region.

The West Fork Big Creek Dam B-128 serves as a vital infrastructure component in the Rock Island District, providing essential flood protection for the residents of Bridgeport and the wider area. With a strategic location and a solid design by the USDA NRCS, this dam stands as a symbol of proactive water resource management and climate resilience efforts in Missouri. Its completion in 2002 marked a significant milestone in enhancing the region's capacity to handle potential flood events, showcasing the importance of sustainable infrastructure development in the face of changing environmental conditions.

15-Day Long Term Forecast


Year Completed

2002

Dam Length

490

Dam Height

29

River Or Stream

WEST FORK BIG CREEK

Primary Dam Type

Earth

Surface Area

7

Hydraulic Height

29

Drainage Area

109

Nid Storage

72

Structural Height

27

Outlet Gates

None

Hazard Potential

Low

Foundations

Rock, Soil

Nid Height

29
       
Seasonal Comparison

5-Day Hourly Forecast Detail

Dam Data Reference

Condition Assessment

Satisfactory
No 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

High
Dams 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.
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