Campbell Lake Dam Reservoir Report

Last Updated: December 13, 2025

Campbell Lake Dam, located in Okanogan, Washington, was completed in 1948 with a primary purpose of recreation.


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Summary

This earth dam, with stone core and soil foundation, stands at a hydraulic height of 10 feet and a structural height of 8 feet, providing a storage capacity of 85 acre-feet. The dam controls the flow of Tr-Beaver Creek and covers a surface area of 11.2 acres, with a drainage area of 3.2 square miles.

Managed by the Washington Department of Ecology, Campbell Lake Dam is regulated, permitted, inspected, and enforced by the state. Despite its low hazard potential and current "Not Rated" condition assessment, the dam has not undergone recent inspections or maintenance assessments. While an emergency action plan (EAP) and inundation maps are not yet prepared, the dam's risk management measures and guidelines compliance remain unspecified. With its scenic location and recreational opportunities, water resource and climate enthusiasts can appreciate the significance of Campbell Lake Dam in Okanogan, Washington.

Year Completed

1948

Dam Length

75

River Or Stream

Tr-Beaver Creek

Primary Dam Type

Earth

Surface Area

11.2

Hydraulic Height

10

Drainage Area

3.2

Nid Storage

85

Structural Height

8

Hazard Potential

Low

Foundations

Soil

Nid Height

10
       
Seasonal Comparison

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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.