Dallas Lake Reservoir Reservoir Report

Last Updated: December 5, 2025

Dallas Lake Reservoir, located in Lake County, Oregon, is a private water resource managed by the D-38 agency.


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Summary

This reservoir primarily serves the purpose of irrigation, with a storage capacity of 920 acre-feet and a maximum storage of 1100 acre-feet. Built in 1959, the earth dam stands at 30 feet in height and spans 790 feet in length, impounding water from Butcher Creek.

The reservoir covers a surface area of 94 acres and has a drainage area of 2.25 square miles. Despite its low hazard potential, the dam has not been rated for its condition, and the last inspection took place in October 2015. The Sacramento District oversees the reservoir, and it is equipped with outlet gates for water release. With a maximum discharge capacity of 100 cubic feet per second, Dallas Lake Reservoir plays a crucial role in sustaining agricultural activities in the region.

For water resource and climate enthusiasts, Dallas Lake Reservoir presents an intriguing case study of a privately owned irrigation facility in Oregon. With its modest storage capacity and essential role in local agriculture, this reservoir serves as a vital water source for the surrounding area. As discussions around water management and conservation continue to gain prominence, understanding the operations and infrastructure of dams like Dallas Lake Reservoir is crucial for ensuring sustainable water resource practices in the face of climate change.

Year Completed

1959

Dam Length

790

Dam Height

28

River Or Stream

BUTCHER CREEK

Primary Dam Type

Earth

Surface Area

94

Hydraulic Height

24

Drainage Area

2.25

Nid Storage

1100

Structural Height

30

Hazard Potential

Low

Nid Height

30
       
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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Area Campgrounds