Selway Dam Reservoir Report

Last Updated: December 11, 2025

Selway Dam, located in Clark County, Missouri, is a privately owned earth dam designed by the USDA NRCS and completed in 2006 for grade stabilization along the TR-Foree Branch river.


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Summary

The dam stands at a height of 26 feet with a hydraulic height of 24 feet and a structural height of 29 feet, encompassing a length of 250 feet. It has a capacity for 20.5 acre-feet of storage, with a normal storage of 12.6 acre-feet and a surface area of 7 acres, serving a drainage area of 110 square miles.

Despite being categorized as having a low hazard potential, Selway Dam poses a moderate risk, as indicated by its risk assessment score of 3. The dam features an uncontrolled spillway type and outlet gates, with a maximum discharge capacity of 71.4 cubic feet per second. While the dam's condition assessment is currently not rated, it has not undergone any inspections since its completion in 2006. With its functional purpose of grade stabilization and its significant role in managing water resources in the region, Selway Dam remains a notable structure for water resource and climate enthusiasts to explore and study in the context of sustainable infrastructure development and risk management.

Year Completed

2006

Dam Length

250

Dam Height

26

River Or Stream

TR-FOREE BRANCH

Primary Dam Type

Earth

Surface Area

7

Hydraulic Height

24

Drainage Area

110

Nid Storage

20.5

Structural Height

29

Outlet Gates

Uncontrolled

Hazard Potential

Low

Foundations

Soil

Nid Height

29
       
Seasonal Comparison

Weather Forecast

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.