Partridge Ranch Dam Reservoir Report
Nearby: Lenice Dam Merry Dam
Last Updated: December 15, 2025
Partridge Ranch Dam, located in Grant County, Washington, is a privately owned earth dam constructed in 2010 by JUB Engineers for the primary purpose of irrigation.
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Summary
With a hydraulic height of 12 feet and a storage capacity of 24 acre-feet, the dam plays a crucial role in water resource management in the region. However, despite its importance, the dam is classified as having a high hazard potential and poor condition, highlighting the need for regular inspections and potential maintenance.
The Washington Department of Ecology regulates Partridge Ranch Dam, ensuring compliance with state permitting, inspection, and enforcement requirements. The dam is situated offstream, serving as a key component of the local irrigation infrastructure. In the event of an emergency, the dam's Emergency Action Plan (EAP) is crucial for ensuring public safety and mitigating risks associated with potential dam failures. As climate change continues to impact water resources and infrastructure resilience, the maintenance and management of dams like Partridge Ranch Dam become increasingly vital for sustainable water management practices in the region.
Despite its critical role in irrigation and water storage, Partridge Ranch Dam faces challenges related to its hazard potential and condition assessment. With a history of poor maintenance and a high hazard classification, ongoing risk assessment and management measures are essential to ensure the safety and functionality of the dam. As water resource and climate enthusiasts, it is imperative to advocate for sustainable dam management practices and investment in infrastructure resilience to address the growing threats posed by climate change and ensure the long-term viability of water resources in the region.
Year Completed |
2010 |
River Or Stream |
Offstream |
Primary Dam Type |
Earth |
Surface Area |
2 |
Hydraulic Height |
12 |
Nid Storage |
24 |
Structural Height |
12 |
Hazard Potential |
High |
Foundations |
Soil |
Nid Height |
12 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Crab Creek Near Beverly
|
160cfs |
Columbia River Below Priest Rapids Dam
|
115000cfs |
Crab Creek Near Moses Lake
|
26cfs |
Yakima River At Kiona
|
16300cfs |
Granger Drain At Granger
|
13cfs |
Yakima River At Umtanum
|
4720cfs |
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.
Partridge Ranch Dam