Sunheaven Farms Reservoir Reservoir Report
Last Updated: December 14, 2025
Sunheaven Farms Reservoir, located in Benton, Washington, is a privately owned irrigation reservoir that draws water from the Columbia River-Offstream.
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Summary
Built in 1986, this Earth-type dam has a hydraulic height of 13 feet and a structural height of 8 feet, with a storage capacity of 100 acre-feet. The reservoir covers a surface area of 9.1 acres and serves the primary purpose of irrigation for agricultural activities in the area.
Managed by the Washington Department of Ecology, Sunheaven Farms Reservoir is regulated and inspected by the state to ensure compliance with safety standards. With a low hazard potential, the reservoir has not been rated for its condition assessment, but it meets the necessary guidelines for emergency action planning. Although the risk assessment and management measures are not specified, the reservoir plays a crucial role in providing water resources for agricultural needs in the region.
Situated in Congressional District 04, Washington, Sunheaven Farms Reservoir stands as a vital infrastructure for water resource management in the area. With its modest size and capacity, the reservoir contributes to sustaining irrigation practices and supporting the agricultural community, highlighting the intersection of water resource management and climate resilience efforts in the region.
Year Completed |
1986 |
Dam Length |
2470 |
River Or Stream |
Columbia River-Offstream |
Primary Dam Type |
Earth |
Surface Area |
9.1 |
Hydraulic Height |
13 |
Drainage Area |
0.12 |
Nid Storage |
100 |
Structural Height |
8 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
13 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Yakima River At Kiona
|
23800cfs |
Umatilla River Near Umatilla
|
516cfs |
Yakima River At Mabton
|
28900cfs |
Granger Drain At Granger
|
13cfs |
Walla Walla River Near Touchet
|
1040cfs |
Columbia River Below Priest Rapids Dam
|
124000cfs |
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.
Sunheaven Farms Reservoir