Peyralans Reservoir Reservoir Report

Last Updated: December 13, 2025

Peyralans Reservoir, located in Multnomah County, Oregon, is a significant water resource managed by the local government.


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Summary

This reservoir is regulated by the Oregon Water Resources Department, ensuring its safe operation and maintenance. With a height of 23 feet and a storage capacity of 12 acre-feet, Peyralans Reservoir plays a crucial role in managing water supply and flood control in the area.

Sitting on Butler Creek and under the jurisdiction of the Portland District, Peyralans Reservoir is a key infrastructure that contributes to the overall water management system in the region. Despite its modest size, this reservoir has a significant hazard potential, making regular inspections and maintenance crucial to ensure its integrity and safety. With its location in a populated area, emergency preparedness and risk management measures are essential components in maintaining the reservoir's functionality and protecting surrounding communities.

Water resource and climate enthusiasts will find Peyralans Reservoir to be an intriguing case study in local water management practices. With its state-regulated status and critical role in water supply and flood control, this reservoir serves as a valuable asset in the region's infrastructure. Monitoring its condition, hazard potential, and emergency preparedness efforts are essential for ensuring the continued safety and effectiveness of Peyralans Reservoir in the face of changing environmental conditions and potential risks.

Dam Height

23

River Or Stream

BUTLER CREEK

Nid Storage

12

Hazard Potential

Significant

Nid Height

23
       
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.