Evans Flavorland Reservoir No 2 Reservoir Report
Last Updated: December 15, 2025
Evans Flavorland Reservoir No 2, located in Sunnyside, Washington, is a privately-owned irrigation reservoir designed by PLSA Engineers and regulated by the Washington Department of Ecology.
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Summary
Completed in 1998, this earth dam structure has a hydraulic height of 50 feet and a storage capacity of 140 acre-feet, primarily serving the purpose of irrigation for the surrounding agricultural area. With a normal storage capacity of 115 acre-feet and a surface area of 4.2 acres, this reservoir plays a crucial role in water resource management in the Yakima region.
Despite its satisfactory condition assessment, Evans Flavorland Reservoir No 2 has a high hazard potential, requiring regular inspections every five years to ensure its structural integrity and safety. The reservoir's maximum discharge capacity is 530 cubic feet per second, with no spillway type specified in the data. Congressional District 04, represented by Dan Newhouse, oversees this water resource along with the Seattle District of the US Army Corps of Engineers, although the reservoir itself is not owned or funded by any federal agencies. Water and climate enthusiasts interested in the management and regulation of water resources in the Yakima area will find Evans Flavorland Reservoir No 2 to be a fascinating case study in private ownership and state jurisdiction.
Year Completed |
1998 |
Dam Length |
400 |
River Or Stream |
Unnamed Trib Yakima R. |
Primary Dam Type |
Earth |
Surface Area |
4.2 |
Hydraulic Height |
50 |
Drainage Area |
0.59 |
Nid Storage |
140 |
Structural Height |
50 |
Hazard Potential |
High |
Foundations |
Rock, Soil |
Nid Height |
50 |
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.
Evans Flavorland Reservoir No 2