Stout Reservoir Dam Reservoir Report

Last Updated: March 3, 2026

Stout Reservoir Dam, located in Okanogan, Washington, serves multiple purposes including fire protection, stock maintenance, and recreational activities.


Summary

The dam, completed in 1958, is primarily made of earth and stone, with a structural height of 29 feet and a storage capacity of 86 acre-feet. It is regulated by the Washington Dept of Ecology and undergoes regular inspections to ensure its satisfactory condition and high hazard potential.

The reservoir, situated on Tr-Chiliwist Creek, covers a surface area of 4.6 acres and has a drainage area of 2.54 square miles. With a maximum discharge capacity of 400 cubic feet per second, the dam plays a crucial role in managing water resources and protecting the surrounding area from potential hazards. Despite the dam's high hazard potential, its condition assessment remains satisfactory, reflecting the efforts put into its maintenance and risk management.

As a key infrastructure in the region, Stout Reservoir Dam not only contributes to water resource management but also provides opportunities for recreation and stock maintenance. Its strategic location and design make it a vital asset for the community, highlighting the importance of sustainable dam operation and maintenance in the face of changing climate conditions.



°F

°F

mph

Wind

%

Humidity


15-Day Weather Outlook


Year Completed

1958

River Or Stream

Tr-Chiliwist Creek

Primary Dam Type

Earth

Surface Area

4.6

Hydraulic Height

29

Drainage Area

2.54

Nid Storage

86

Structural Height

29

Hazard Potential

High

Foundations

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.