West Fork Big Creek Dam W-42 Reservoir Report

Last Updated: April 26, 2026

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West Fork Big Creek Dam W-42, located in Harrison, Missouri, was completed in 2009 by the USDA NRCS with the primary purpose of flood risk reduction along Wolf Creek.


Summary

This private earth dam stands at a height of 30.6 feet and has a storage capacity of 128.3 acre-feet, with a normal storage level of 35.5 acre-feet. The dam spans 500 feet in length and covers a surface area of 7 acres, serving a drainage area of 170 square miles.

Despite its low hazard potential and moderate risk assessment, West Fork Big Creek Dam W-42 has not been rated for its condition assessment. The dam features an uncontrolled spillway with a width of 40 feet and no outlet gates. While it is not regulated by the state or inspected regularly, the dam serves as a crucial infrastructure for managing flood risks in the region. With its stone core and soil foundation, this dam showcases the importance of private entities taking proactive measures to safeguard against potential water resource and climate-related challenges.

15-Day Long Term Forecast


Year Completed

2009

Dam Length

500

Dam Height

30.6

River Or Stream

WOLF CREEK

Primary Dam Type

Earth

Surface Area

7

Hydraulic Height

30.6

Drainage Area

170

Nid Storage

128.3

Structural Height

34

Outlet Gates

None

Hazard Potential

Low

Foundations

Soil

Nid Height

34
       
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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