Little Willow Creek Reservoir Reservoir Report
Last Updated: December 6, 2025
Little Willow Creek Reservoir is a privately owned reservoir located in Maupin, Oregon, along the Little Willow Creek.
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Summary
Built in 1954, this earth dam stands at a height of 43 feet and has a storage capacity of 1140 acre-feet, primarily used for irrigation purposes. With a normal storage capacity of 96 acre-feet and a surface area of 57.8 acres, the reservoir serves as a vital water resource for the surrounding area.
Managed by the Oregon Water Resources Department, the reservoir has a low hazard potential and has not been rated in terms of its condition assessment. Despite being privately owned, the state agency regulates its operations and conducts inspections, ensuring its safety and compliance with state jurisdiction. The reservoir's maximum discharge capacity is 425 cfs, providing water security for the community and agricultural activities in the region.
Surrounded by the beautiful landscape of Jefferson County, Oregon, Little Willow Creek Reservoir offers a peaceful retreat and a glimpse into the intricate relationship between water resources and climate in the region. As climate enthusiasts observe the reservoir's role in irrigation and water management, they can appreciate the careful planning and maintenance that goes into sustaining this essential water source for the local community.
Year Completed |
1954 |
Dam Length |
1000 |
Dam Height |
43 |
River Or Stream |
LITTLE WILLOW CREEK |
Primary Dam Type |
Earth |
Surface Area |
57.8 |
Hydraulic Height |
41 |
Drainage Area |
12.4 |
Nid Storage |
1140 |
Structural Height |
43 |
Hazard Potential |
Low |
Nid Height |
43 |
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.
Little Willow Creek Reservoir