Limerick Lake Dam Reservoir Report

Last Updated: December 13, 2025

Limerick Lake Dam, located in Mason County, Washington, stands as a pivotal structure regulating the flow of Cranberry Creek.


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Summary

Built in 1966, this private-owned Earth dam serves primarily for recreational purposes, offering a storage capacity of 1600 acre-feet. With a hydraulic height of 34 feet and a structural height of 28 feet, the dam boasts a significant impact on the local watershed, covering a surface area of 130 acres and draining an 11.3 square mile watershed.

Maintained and regulated by the Washington Dept of Ecology, Limerick Lake Dam has undergone regular inspections, with its last assessment conducted in August 2020, deeming its condition satisfactory. Classified as having a high hazard potential, the dam is equipped with emergency action plans to ensure the safety of surrounding communities in case of a breach. Despite its age, the dam's design and construction have stood the test of time, meeting regulatory standards and providing a reliable source of recreation for residents and visitors alike.

As part of Congressional District 06, Washington, Limerick Lake Dam plays a crucial role in managing water resources and mitigating flood risks in the region. With its strategic location and operational efficiency, the dam continues to serve as a vital infrastructure for water management, highlighting the importance of sustainable practices in safeguarding our natural environment amidst changing climate conditions.

Year Completed

1966

Dam Length

400

River Or Stream

Cranberry Creek

Primary Dam Type

Earth

Surface Area

130

Hydraulic Height

34

Drainage Area

11.3

Nid Storage

1600

Structural Height

28

Hazard Potential

High

Foundations

Soil

Nid Height

34
       
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.