Fitzgerald Reservoir Reservoir Report

Last Updated: December 12, 2025

Located in Plush, Oregon, Fitzgerald Reservoir is a privately owned earth dam structure primarily used for irrigation purposes.


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Summary

Completed in 1941, this reservoir has a capacity of 140 acre-feet and a surface area of 37.1 acres. The dam stands at a height of 25 feet, with a structural height of 28 feet and a hydraulic height of 23 feet, serving as a vital water resource for the surrounding area.

Situated on Colvin Creek and North Fork, Fitzgerald Reservoir has a low hazard potential and is currently not rated for its condition assessment. While the dam has not been inspected or assessed recently, it remains under state jurisdiction and is regulated by the Oregon Water Resources Department. With a normal storage capacity of 104 acre-feet, the reservoir plays a crucial role in supporting irrigation activities in the region.

Despite its age, Fitzgerald Reservoir continues to be a key component in the water management system of Lake County, Oregon. With its strategic location and essential purpose, this reservoir serves as a valuable resource for sustaining agricultural activities and ensuring water security in the area. As water resource and climate enthusiasts, the significance of Fitzgerald Reservoir lies in its contribution to the local ecosystem and economy, highlighting the importance of responsible water management practices in the region.

Year Completed

1941

Dam Length

550

Dam Height

25

River Or Stream

COLVIN CREEK, NORTH FORK

Primary Dam Type

Earth

Surface Area

37.1

Hydraulic Height

23

Drainage Area

4.39

Nid Storage

140

Structural Height

28

Hazard Potential

Low

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.