Finley Ranch Reservoir Reservoir Report
Nearby: Mcnary Lock And Dam - Kennewick Levees 15c, 15d, 15e Mcnary Lock And Dam - Kennewick Levee 7
Last Updated: December 14, 2025
Finley Ranch Reservoir, located in Finley, Washington, is a private water supply reservoir designed by Gary Weatherly and completed in 2013.
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Summary
With a primary purpose of providing irrigation and water supply, this earth dam structure stands at a hydraulic height of 23 feet, offering a storage capacity of 43 acre-feet. The reservoir covers a surface area of 3 acres and is regulated by the Washington Department of Ecology, with state permitting, inspection, and enforcement in place to ensure its safety and compliance.
Despite its compact size, Finley Ranch Reservoir plays a crucial role in water resource management in Benton County, Washington. The dam has a satisfactory condition assessment, with a high hazard potential, necessitating regular inspections every five years. Situated in Congressional District 04, Washington, under the stewardship of private owners, this reservoir serves as a valuable asset for the local community and agriculture sector. With its strategic location and purpose, Finley Ranch Reservoir contributes to the sustainability and resilience of the region's water supply in the face of changing climate patterns.
As an essential component of the water infrastructure in the area, Finley Ranch Reservoir ensures reliable water access for irrigation and agricultural activities. With a focus on water supply, this earth dam structure embodies the intersection of human ingenuity and environmental stewardship. Its proximity to the Walla Walla District and efficient operation under the supervision of the Washington Department of Ecology underscores the importance of responsible water management in mitigating the impacts of climate change. Finley Ranch Reservoir stands as a testament to the vital role of private initiatives in safeguarding water resources for current and future generations.
Year Completed |
2013 |
Primary Dam Type |
Earth |
Surface Area |
3 |
Hydraulic Height |
23 |
Nid Storage |
43 |
Structural Height |
23 |
Hazard Potential |
High |
Foundations |
Soil |
Nid Height |
23 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Walla Walla River Near Touchet
|
1330cfs |
Umatilla River Near Umatilla
|
713cfs |
Yakima River At Kiona
|
27000cfs |
Umatilla R At W Reservation Bndy Nr Pendleton
|
573cfs |
Mill Creek At Walla Walla
|
304cfs |
Mill Creek At Five Mile Rd Br Nr Walla Walla
|
634cfs |
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.
Area Campgrounds
| Location | Reservations | Toilets |
|---|---|---|
Hood Park
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Madame Dorion Park
|
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Columbia Park
|
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Ice Harbor Ramp - Lake Sacajawea
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Finley Ranch Reservoir
East Donelson Road 222798-224804, Kennewick