Sundstrom Dam No 2 Reservoir Report

Last Updated: December 14, 2025

Sundstrom Dam No 2, located in San Juan, Washington, stands as a vital structure for water resource management in the region.


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Summary

Built in 1984 for irrigation purposes, the dam serves multiple functions including recreation and water supply. With a hydraulic height of 28 feet and a storage capacity of 125 acre-feet, the dam plays a crucial role in regulating the flow of water from the Unnamed Creek-Beaverton Valley.

Managed by a private entity, Sundstrom Dam No 2 is under the regulatory oversight of the Washington Department of Ecology. Despite its low hazard potential, the dam's condition assessment remains unrated, highlighting the need for regular inspections and maintenance. The dam's location within Congressional District 02, Washington, underscores its significance in the local water infrastructure and the importance of ensuring its safety and efficiency for the surrounding community.

With a surface area of 8.6 acres and a drainage area of 0.19 square miles, Sundstrom Dam No 2 demonstrates the intersection of human engineering and environmental stewardship. As climate change impacts water resources, structures like this dam become increasingly crucial for sustainable water management. As water enthusiasts and climate advocates, understanding and supporting the maintenance and operation of Sundstrom Dam No 2 can contribute to the resilience and adaptability of the region's water infrastructure in the face of a changing climate.

Year Completed

1984

Dam Length

715

River Or Stream

Unnamed Creek-Beaverton Valley

Primary Dam Type

Earth

Surface Area

8.6

Hydraulic Height

28

Drainage Area

0.19

Nid Storage

125

Structural Height

28

Hazard Potential

Low

Foundations

Soil

Nid Height

28
       
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.