Fairview Lake Reservoir Report

Last Updated: December 13, 2025

Fairview Lake, located in Multnomah County, Oregon, is a private water resource regulated by the Oregon Water Resources Department.


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Summary

This 1919-built dam serves multiple purposes, including flood risk reduction and recreation, making it a vital component of the surrounding ecosystem. With a dam height of 18 feet and a storage capacity of 411 acre-feet, Fairview Lake covers a surface area of 129 acres and has a drainage area of 7.2 square miles.

Despite its low hazard potential, Fairview Lake plays a crucial role in water management in the area, with a normal storage capacity of 235 acre-feet. The dam has a structural height of 18 feet and a hydraulic height of 4 feet, ensuring its stability and effectiveness in flood risk reduction. The dam's location on the Columbia Slough, with no downstream settlement, further emphasizes its importance in maintaining water quality and flow in the region.

Fairview Lake offers not only recreational opportunities but also serves as a key infrastructure for water resource management in the region. With state regulation and inspection ensuring its safety and efficiency, this earth dam continues to play a vital role in balancing water needs for both human use and ecological sustainability in the area.

Year Completed

1919

Dam Length

975

Dam Height

18

River Or Stream

COLUMBIA SLOUGH

Primary Dam Type

Earth

Surface Area

129

Hydraulic Height

4

Drainage Area

7.2

Nid Storage

411

Structural Height

18

Hazard Potential

Low

Nid Height

18
       
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.
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Area Campgrounds