Zielinski Farm Reservoir Reservoir Report

Last Updated: December 13, 2025

Zielinski Farm Reservoir, located in Canby, Oregon, is a privately-owned earth dam built in 1974 primarily for irrigation purposes.


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Summary

The reservoir has a storage capacity of 41 acre-feet and covers a surface area of 4.58 acres, serving as a vital water resource for agricultural activities in the region. With a significant hazard potential and a hydraulic height of 22 feet, the dam plays a crucial role in managing water flow in the tributary to Cedar Creek.

Managed by the Oregon Water Resources Department, Zielinski Farm Reservoir undergoes regular state inspections, enforcement, and permitting to ensure its safety and compliance with regulations. The reservoir features a needle outlet gate and has a design height of 26 feet, with a dam length of 300 feet. Although the condition assessment is currently not rated, the reservoir's last inspection was conducted in September 2020, with a scheduled inspection frequency of every 3 years to monitor its structural integrity and operational efficiency.

For water resource and climate enthusiasts, Zielinski Farm Reservoir presents an intriguing example of human intervention in managing water resources for agricultural needs. The reservoir's location in Clackamas County, Oregon, highlights the importance of sustainable water management practices in ensuring a reliable water supply for irrigation purposes. As a significant component of the local water infrastructure, the reservoir showcases the intersection of technology, environmental stewardship, and regulatory oversight in safeguarding water resources for future generations.

Year Completed

1974

Dam Length

300

Dam Height

26

River Or Stream

TRIB TO CEDAR CREEK

Primary Dam Type

Earth

Surface Area

4.58

Hydraulic Height

22

Drainage Area

0.31

Nid Storage

41

Structural Height

26

Outlet Gates

Needle

Hazard Potential

Significant

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.
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