Othello Primary Treatment Pond 1b Reservoir Report
Last Updated: December 13, 2025
Othello Primary Treatment Pond 1b, located in Corfu, Washington, is a key water resource managed by the local government.
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Summary
This primary treatment pond plays a vital role in the state's water management system, as it is regulated, permitted, inspected, and enforced by the Washington Department of Ecology. Completed in 1982, the pond has a hydraulic height of 16 feet and a structural height of 13 feet, with a storage capacity of 200 acre-feet and a surface area of 115 acres.
With a low hazard potential and a condition assessment of "Not Rated," Othello Primary Treatment Pond 1b serves as an essential component in maintaining water quality and managing water resources in Adams County, Washington. While it does not have a spillway type or outlet gates, the pond's design as an earth dam with a rockfill core on a soil foundation ensures its stability and effectiveness in storing and treating water. Furthermore, its location near Crab Creek and offstream positioning enhances its impact on water quality in the region.
Managed by the local government and with a focus on purposes beyond flood control or irrigation, Othello Primary Treatment Pond 1b stands as a testament to the importance of water treatment and resource management in the face of climate change and increasing water demands. As climate enthusiasts and water resource stakeholders continue to monitor and assess water infrastructure like this pond, its role in preserving water quality and sustainability in the region remains crucial for future generations.
Year Completed |
1982 |
Dam Length |
2150 |
River Or Stream |
Tr-Crab Creek-Offstream |
Primary Dam Type |
Earth |
Surface Area |
115 |
Hydraulic Height |
16 |
Drainage Area |
0.06 |
Nid Storage |
200 |
Structural Height |
13 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
16 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Crab Creek Near Moses Lake
|
34cfs |
Crab Creek Near Beverly
|
165cfs |
Columbia River Below Priest Rapids Dam
|
103000cfs |
Crab Creek At Irby
|
2cfs |
Yakima River At Kiona
|
20700cfs |
Palouse River At Hooper
|
391cfs |
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
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|---|---|---|
Lyle Lake - WDFW
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Long Lake (Warden) - WDFW
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Northend Canal Lake North WDFW
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Heart Lake - WDFW
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Corral Lake - WDFW
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Glen Williams - WDFW
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Othello Primary Treatment Pond 1b
Grant County