Avalon Fruit Dam 4 Reservoir Report
Nearby: Avalon Fruit Dam 3 Avalon Fruit Dam 2
Last Updated: December 15, 2025
Avalon Fruit Dam 4, located in Sunnyside, Washington, along Washout Creek, was completed in 1985 primarily for irrigation purposes.
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Summary
Owned privately, this earth dam stands at a hydraulic height of 12 feet and a length of 290 feet, providing a storage capacity of 21 acre-feet. With a surface area of 2.25 acres, this dam is regulated by the Washington Department of Ecology, ensuring it meets state inspection and enforcement requirements.
Despite its fair condition assessment in 2015, Avalon Fruit Dam 4 has a high hazard potential, emphasizing the need for regular inspections and maintenance to mitigate risks. The dam, constructed with a rockfill core on a soil foundation, serves as a vital water resource for agricultural activities in the Yakima County area. With Dan Newhouse (R) representing the Congressional District 04, efforts are in place to ensure the safety and functionality of this essential infrastructure for water management and climate resilience in the region.
Year Completed |
1985 |
Dam Length |
290 |
River Or Stream |
Washout Creek |
Primary Dam Type |
Earth |
Surface Area |
2.25 |
Hydraulic Height |
12 |
Nid Storage |
21 |
Structural Height |
12 |
Hazard Potential |
High |
Foundations |
Soil |
Nid Height |
12 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Granger Drain At Granger
|
13cfs |
Yakima River At Mabton
|
19900cfs |
Columbia River Below Priest Rapids Dam
|
115000cfs |
Yakima River Above Ahtanum Creek At Union Gap
|
11300cfs |
Ahtanum Creek At Union Gap
|
164cfs |
Yakima River At Kiona
|
16300cfs |
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.
Avalon Fruit Dam 4