Munn Reservoir Reservoir Report

Last Updated: December 13, 2025

Munn Reservoir, located in Baker, Oregon, along the Middle Fork Burnt River, is a privately owned water resource primarily used for irrigation purposes.


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Summary

The earth dam, completed in 1947, stands at a height of 23 feet and has a storage capacity of 205 acre-feet, with a normal storage level of 120 acre-feet. The reservoir covers an area of 18.25 acres and serves as a vital water source for the surrounding agricultural lands.

Maintained and regulated by the Oregon Water Resources Department, Munn Reservoir has a low hazard potential and has not been assessed for its condition. The dam's last inspection was conducted in October 2020, with a scheduled frequency of every six years. Despite its relatively small size, the reservoir plays a crucial role in supporting the local farming community by providing a reliable water supply for crop irrigation.

With its picturesque location and essential function in sustaining agricultural activities, Munn Reservoir serves as a valuable asset in water resource management in the region. As climate change continues to impact water availability and quality, reservoirs like Munn play a vital role in ensuring a stable water supply for both agricultural and ecological needs in the area.

Year Completed

1947

Dam Length

572

Dam Height

23

River Or Stream

MIDDLE FORK BURNT RIVER

Primary Dam Type

Earth

Surface Area

18.25

Hydraulic Height

18

Drainage Area

0.54

Nid Storage

205

Structural Height

23

Hazard Potential

Low

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.