Barnes Bros. Reservoir Reservoir Report

Last Updated: December 13, 2025

Barnes Bros.


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Summary

Reservoir, located in Marion County, Oregon, is a private water storage facility primarily used for irrigation purposes. Completed in 1963, this earth dam stands at a height of 32 feet and has a storage capacity of 100 acre-feet. With a surface area of 6.4 acres and a drainage area of 1.59 square miles, the reservoir plays a crucial role in managing water resources in the region.

Managed by the Natural Resources Conservation Service, Barnes Bros. Reservoir is subject to state regulations and inspections to ensure its safety and functionality. The dam's spillway type, hazard potential, and condition assessment all contribute to its risk management measures. With a significant hazard potential, emergency action plans are likely in place to address any potential risks and protect surrounding areas in the event of a dam failure.

The reservoir's strategic location on Beaver Creek, a tributary to the Willamette River, underscores its importance in the local water system. As climate change continues to impact water resources, reservoirs like Barnes Bros. play a critical role in ensuring a reliable water supply for irrigation and other needs in the region.

Year Completed

1963

Dam Length

527

Dam Height

32

River Or Stream

BEAVER CREEK, TRIB TO

Primary Dam Type

Earth

Surface Area

6.4

Hydraulic Height

30

Drainage Area

1.59

Nid Storage

100

Structural Height

34

Outlet Gates

Slide (sluice gate)

Hazard Potential

Significant

Nid Height

34
       
Seasonal Comparison

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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.