Mccormick Reservoir Reservoir Report

Last Updated: December 13, 2025

Mccormick Reservoir, located in Jackson, Oregon, serves as a vital water resource for irrigation purposes in the region.


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Summary

Constructed in 1954, this earth dam stands at a height of 24 feet and has a storage capacity of 38 acre-feet. With a surface area of 4.6 acres and a drainage area of 0.7 square miles, the reservoir plays a crucial role in managing water flow from the Rogue River tributary.

Owned privately, Mccormick Reservoir is regulated by the Oregon Water Resources Department and undergoes regular inspections to ensure its structural integrity and functionality. The reservoir's hazard potential is deemed significant, highlighting the importance of proper risk management measures and emergency preparedness. Despite not being rated for its condition, the reservoir continues to support the irrigation needs of the surrounding agricultural community.

Located in the Portland District, Mccormick Reservoir offers a glimpse into the intricate system of water management and infrastructure that sustains the region's agricultural activities. As climate change poses challenges to water resources, reservoirs like Mccormick play a crucial role in ensuring water availability for irrigation and other essential purposes in the face of evolving environmental conditions.

Year Completed

1954

Dam Length

726

Dam Height

24

River Or Stream

ROGUE RIVER, TRIB TO

Primary Dam Type

Earth

Surface Area

4.6

Hydraulic Height

20

Drainage Area

0.7

Nid Storage

38

Structural Height

24

Hazard Potential

Significant

Nid Height

24
       
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.