Kristofferson Lake Dam Reservoir Report

Last Updated: December 15, 2025

Kristofferson Lake Dam in Washington state was completed in 1961 and serves primarily for recreation, with secondary purposes including irrigation.


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Summary

The dam is privately owned and regulated by the Washington Dept of Ecology, with state jurisdiction and permitting in place. Situated on Tr-Triangle Cove, the dam is an earth type structure with a hydraulic height of 7 feet and a length of 150 feet.

With a storage capacity of 125 acre-feet, Kristofferson Lake Dam covers a surface area of 53 acres and has a drainage area of 1.12 square miles. The dam's hazard potential is rated as low, and its condition assessment is currently not rated. Although there is no recent inspection data available, the dam is regularly inspected by the state as part of its enforcement and regulatory measures. Despite its low hazard potential, the dam's emergency action plan status and risk management measures are not currently documented.

Located in Island County, Washington, Kristofferson Lake Dam provides a valuable recreational resource for the community while also supporting irrigation needs in the area. Water resource and climate enthusiasts interested in the dam's historical significance, design characteristics, and current regulatory status will find this structure to be an intriguing case study in private dam ownership and state oversight.

Year Completed

1961

Dam Length

150

River Or Stream

Tr-Triangle Cove

Primary Dam Type

Earth

Surface Area

53

Hydraulic Height

7

Drainage Area

1.12

Nid Storage

125

Structural Height

7

Hazard Potential

Low

Foundations

Unlisted/Unknown

Nid Height

7
       
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.