Jimmy Creek Reservoir Reservoir Report
Last Updated: December 13, 2025
Jimmy Creek Reservoir, located in Union, Oregon, is a private irrigation reservoir completed in 1981 with a storage capacity of 675 acre-feet.
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Summary
The dam, primarily used for irrigation purposes, stands at a height of 42 feet and spans 265 feet in length, creating a surface area of 52.5 acres. The reservoir is situated on Jimmy Creek and is regulated by the Oregon Water Resources Department, with state permitting, inspection, and enforcement in place to ensure its safety and compliance.
With a significant hazard potential, Jimmy Creek Reservoir has a designated outlet gate system and a maximum discharge capacity of 1,858 cubic feet per second. The dam's emergency action plan status and condition assessment remain unreported, indicating a need for further evaluation and risk management measures. Despite its operational history and structural specifications, the reservoir's risk assessment and emergency preparedness aspects require attention to ensure the safety and security of the surrounding community and water resources in the event of a potential hazard or natural disaster.
Year Completed |
1981 |
Dam Length |
265 |
Dam Height |
42 |
River Or Stream |
JIMMY CREEK |
Primary Dam Type |
Earth |
Surface Area |
52.5 |
Hydraulic Height |
35 |
Drainage Area |
40.2 |
Nid Storage |
675 |
Structural Height |
42 |
Outlet Gates |
Needle |
Hazard Potential |
Significant |
Nid Height |
42 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Dam Data Reference
Condition Assessment
SatisfactoryNo 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
HighDams 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.
Jimmy Creek Reservoir