Solmar Lake Dam Reservoir Report

Last Updated: December 14, 2025

Solmar Lake Dam, located in Clallam, Washington, is a privately owned structure regulated by the Washington Dept of Ecology for its recreational purposes.


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Summary

Completed in 1968, this earth dam stands at a hydraulic height of 16 feet and stretches 400 feet in length, holding a storage capacity of 38 acre-feet for the Tr-McDonald Creek. Its high hazard potential is mitigated by a satisfactory condition assessment as of September 2015, with inspections conducted every five years.

The dam's design, with a stone core and soil foundation, provides a structural height of 16 feet to maintain normal storage levels of 34 acre-feet over a 7-acre surface area. While no spillway information is available, the dam's maximum discharge capacity is recorded at 6 cubic feet per second. Despite its potential risks, Solmar Lake Dam has yet to undergo modifications since its completion, reflecting a stable operational history that aligns with its primary purpose of recreation for the local community and visitors.

In the congressional district represented by Derek Kilmer, Solmar Lake Dam remains a key feature for water resource and climate enthusiasts, serving as both a recreational hub and a regulated infrastructure for environmental stewardship. With continued state inspection and enforcement, this dam stands as a testament to responsible ownership and management in ensuring the safety and sustainability of water resources in the region.

Year Completed

1968

Dam Length

400

River Or Stream

Tr-McDonald Creek

Primary Dam Type

Earth

Surface Area

7

Hydraulic Height

16

Drainage Area

0.37

Nid Storage

38

Structural Height

16

Hazard Potential

High

Foundations

Soil

Nid Height

16
       
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.