White Rock Reservoir Reservoir Report

Last Updated: December 13, 2025

White Rock Reservoir, located in Lakeview, Oregon, is a privately owned irrigation reservoir designed by the Natural Resources Conservation Service.


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Summary

Completed in 1974, this earth dam structure stands at 31 feet tall and stretches 2550 feet in length, with a storage capacity of 940 acre-feet. The reservoir covers a surface area of 79.4 acres and serves the primary purpose of irrigation for the surrounding area.

Managed by the Oregon Water Resources Department, White Rock Reservoir holds a low hazard potential with a condition assessment of "Not Rated." While the dam has not been modified in recent years, regular inspections are conducted every six years to ensure its safety and functionality. The reservoir draws water from Cox Creek and has a maximum discharge rate of 164 cubic feet per second, contributing to the overall water resource management in the region.

With its strategic location, purposeful design, and vital role in irrigation, White Rock Reservoir stands as a significant water resource infrastructure in Oregon. Enthusiasts of water resources and climate management will find this reservoir a fascinating example of sustainable water utilization and regulation in the state, showcasing the collaboration between private ownership, state agencies, and conservation efforts for the benefit of local communities and ecosystems.

Year Completed

1974

Dam Length

2550

Dam Height

31

River Or Stream

COX CREEK

Primary Dam Type

Earth

Surface Area

79.4

Hydraulic Height

22

Drainage Area

3.61

Nid Storage

940

Structural Height

31

Hazard Potential

Low

Nid Height

31
       
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.