Swofford Pond Reservoir Report

Last Updated: December 12, 2025

Swofford Pond, located in Lewis County, Washington, is a vital resource for fish and wildlife conservation.


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Summary

The pond, with a storage capacity of 1740 acre-feet and a surface area of 209 acres, serves as a habitat for various species in the region. It is primarily managed by the Federal Energy Regulatory Commission for its fish and wildlife management purposes.

This Earth-type dam, with a height of 20 feet and a length of 650 feet, regulates the flow of Sulfer Creek, a tributary of the Cowlitz River. Despite its low hazard potential, the pond is subject to regular inspections by the Federal Energy Regulatory Commission to ensure its structural integrity and safety. The risk assessment for Swofford Pond indicates a very high risk level, emphasizing the importance of ongoing monitoring and management measures.

Although the exact year of completion is unknown, the pond continues to play a crucial role in the conservation efforts of the region. With controlled spillways and a controlled water release system, Swofford Pond demonstrates a commitment to both environmental stewardship and public safety. As a haven for wildlife and a key component of the local ecosystem, this site is a significant asset for water resource and climate enthusiasts alike.

Dam Length

650

Dam Height

20

River Or Stream

Sulfer Creek ( Cowlitz River)

Primary Dam Type

Earth

Surface Area

209

Nid Storage

1740

Structural Height

26

Hazard Potential

Low

Foundations

Unlisted/Unknown

Nid Height

26
       
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.