Blevin Dam Reservoir Report

Last Updated: December 13, 2025

Blevin Dam, located in Nyssa, Oregon, is a privately owned structure with a primary purpose of irrigation.


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Summary

Built in 1954, this earth dam stands at a height of 23 feet and stretches 858 feet in length, containing a storage capacity of 550 acre-feet. Situated on Dry Creek, the dam serves to regulate water flow for agricultural use in the region, with a normal storage capacity of 457 acre-feet and a maximum discharge rate of 770 cubic feet per second.

Managed by the Oregon Water Resources Department, Blevin Dam is subject to state regulations, inspections, and enforcement measures to ensure its safe operation. Despite its low hazard potential, the dam's condition assessment is currently listed as "Not Rated," indicating a need for further evaluation. With a history of regular inspections and a designated emergency action plan frequency of 6 years, the dam plays a crucial role in water resource management in Malheur County, Oregon.

As a key component of the local irrigation infrastructure, Blevin Dam serves as a vital resource for the surrounding agricultural community. With its strategic location on Dry Creek and efficient water storage capacity, the dam continues to play a significant role in supporting sustainable water use and climate resilience efforts in the region.

Year Completed

1954

Dam Length

858

Dam Height

23

River Or Stream

DRY CREEK

Primary Dam Type

Earth

Surface Area

61.02

Hydraulic Height

22

Drainage Area

173

Nid Storage

550

Structural Height

26

Hazard Potential

Low

Nid Height

26
       
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.