Soda Lake Dike Reservoir Report

Last Updated: December 14, 2025

Soda Lake Dike in Grant, Washington, is a federal-owned earth dam built in 1952 by the Bureau of Reclamation for irrigation purposes.


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Summary

Standing at a height of 59 feet and stretching 680 feet in length, this dam has a maximum storage capacity of 10,150 acre-feet, serving as a vital water resource for the surrounding area. With a low hazard potential and a high risk assessment score of 2, the dam is regularly inspected by the Bureau of Reclamation to ensure its structural integrity and safety.

Located in the Seattle District with oversight by the Bureau of Reclamation, Soda Lake Dike plays a crucial role in water management for the region, with a surface area of 184 acres and a normal storage capacity of 10,150 acre-feet. Despite its age, the dam's condition assessment is listed as "Not Available," highlighting the need for ongoing monitoring and maintenance to mitigate any potential risks associated with its operation. With no spillway and a low hazard potential, the dam provides a reliable source of irrigation water while also posing a manageable level of risk to nearby communities.

In the event of an emergency, the dam's emergency action plan status is listed as "Not Available," underscoring the importance of developing comprehensive risk management measures and ensuring that the dam meets safety guidelines. As a key infrastructure for water resource management in Washington, Soda Lake Dike serves as a critical piece of the region's agricultural and environmental landscape, requiring ongoing attention and oversight to safeguard its longevity and functionality for future generations of water resource and climate enthusiasts.

Year Completed

1952

Dam Length

680

Dam Height

59

Primary Dam Type

Earth

Surface Area

184

Hydraulic Height

48

Nid Storage

10150

Structural Height

59

Hazard Potential

Low

Foundations

Rock

Nid Height

59
       
Seasonal Comparison

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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.