Long Creek Reservoir Reservoir Report

Last Updated: December 13, 2025

Long Creek Reservoir, located in Baker, Oregon, is a state-owned water resource managed by the Oregon Water Resources Department.


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Summary

Built in 1918, this Earth-type dam serves primarily for irrigation purposes along the Long Creek river. With a height of 20 feet and a storage capacity of 91 acre-feet, the reservoir covers a surface area of 7 acres and has a normal storage level of 70 acre-feet.

The dam has a low hazard potential and has not been rated for its condition assessment. However, it undergoes inspections every 6 years, with the last one conducted in June 2015. Long Creek Reservoir also boasts a maximum discharge rate of 144 cubic feet per second, ensuring efficient water management for the surrounding area. With its picturesque location and vital role in irrigation, this reservoir is a key asset in sustaining water resources in the region.

Enthusiasts of water resources and climate will find Long Creek Reservoir to be a fascinating example of early 20th-century water infrastructure in Oregon. Its historical significance, coupled with its practical irrigation function, makes it a valuable resource for the local community. The reservoir's location near Hereford and its role in managing water flow along the Long Creek river contribute to its importance in sustaining agricultural activities in the area.

Year Completed

1918

Dam Length

264

Dam Height

20

River Or Stream

LONG CREEK

Primary Dam Type

Earth

Surface Area

7

Hydraulic Height

18

Drainage Area

2.91

Nid Storage

91

Structural Height

28

Hazard Potential

Low

Nid Height

28
       
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