Lincoln Rock S.P. Evaporative Lagoons Reservoir Report

Last Updated: December 15, 2025

Lincoln Rock State Park's Evaporative Lagoons in East Wenatchee, Washington, is a significant water resource infrastructure owned by the public utility.


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Summary

This Earth-type dam, completed in 1981, serves a unique purpose with a storage capacity of 15 acre-feet. The lagoons cover an area of 2.82 acres and are regulated by the Washington Department of Ecology, ensuring proper inspection and enforcement measures are in place.

The dam's hydraulic height of 14.5 feet and structural height of 6.5 feet contribute to its fair condition assessment as of February 2016. With a hazard potential deemed significant, the lagoons are subject to regular inspections every 5 years to ensure their safety and functionality. Located in Douglas County, Washington, this water infrastructure plays a crucial role in managing water resources in the region, with a normal storage capacity of 13 acre-feet.

Enthusiasts of water resources and climate will appreciate the unique design and purpose of Lincoln Rock State Park's Evaporative Lagoons. With a focus on water management and conservation, this public utility-owned structure showcases the importance of sustainable infrastructure for maintaining water resources in the state of Washington. The lagoons' significant hazard potential highlights the need for ongoing monitoring and risk management measures to ensure their continued operation and safety for the surrounding community.

Year Completed

1981

Primary Dam Type

Earth

Surface Area

2.82

Hydraulic Height

14.5

Drainage Area

3

Nid Storage

15

Structural Height

6.5

Hazard Potential

Significant

Foundations

Soil

Nid Height

15
       
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.