Conger Lake Dam Reservoir Report

Last Updated: December 5, 2025

Conger Lake Dam is a privately owned structure located in Pend Oreille, Washington, specifically in the city of Jared.


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Summary

The dam, completed in 1926, serves primarily for recreational purposes and is situated on Trimble Creek. With a hydraulic height of 22 feet and a structural height of 20 feet, the dam boasts a storage capacity of 150 acre-feet, providing a surface area of 5.3 acres for water enthusiasts to enjoy.

Despite its age, Conger Lake Dam has a low hazard potential and has not been rated for its condition. Although the last inspection was conducted in May 1994, the dam is maintained by the Washington Department of Ecology, ensuring that it meets state regulatory standards for safety and operation. As a private structure, it falls under state jurisdiction and is subject to permitting, inspection, and enforcement by relevant state agencies.

Located in Congressional District 05, Washington, Conger Lake Dam is a historical landmark that offers both recreational opportunities and a glimpse into early 20th-century engineering practices. As climate change continues to impact water resources, dams like Conger Lake play a crucial role in managing water flow and providing a source of leisure for local communities. With its stone core and earth foundation, this dam represents a blend of traditional construction methods and modern regulatory oversight, making it a significant piece of Washington's water infrastructure.

Year Completed

1926

Dam Length

75

River Or Stream

Trimble Creek

Primary Dam Type

Earth

Surface Area

5.3

Hydraulic Height

22

Drainage Area

14.8

Nid Storage

150

Structural Height

20

Hazard Potential

Low

Foundations

Soil

Nid Height

22
       
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.