Othello Primary Treatment Pond 1a Reservoir Report
Last Updated: December 13, 2025
Othello Primary Treatment Pond 1a is a vital water resource structure located in Adams County, Washington, specifically in the city of Corfu.
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Summary
Managed by the local government, this earth dam was completed in 1982 and serves as a key component in the treatment and management of water in the region. With a maximum storage capacity of 200 acre-feet and a normal storage capacity of 115 acre-feet, this pond plays a crucial role in controlling water flow, especially in the Tr-Crab Creek-Offstream area.
The dam boasts a hydraulic height of 27 feet and a structural height of 24 feet, with a length of 2250 feet. Despite its low hazard potential, Othello Primary Treatment Pond 1a is subject to state regulation and inspection by the Washington Department of Ecology. Its purpose, classified as 'Other,' underscores its significance in the overall water management system of the region. Moreover, its condition assessment is currently marked as 'Not Rated,' indicating the need for further evaluation and monitoring to ensure its continued functionality and safety.
With its strategic location and critical role in water treatment and control, Othello Primary Treatment Pond 1a is a key asset in the water infrastructure of Adams County. As part of the state-regulated system, this earth dam provides essential services in managing water resources and maintaining water quality in the area. Its low hazard potential, along with state oversight and inspection, highlights the commitment to ensuring the safety and effectiveness of this important water resource structure for the community and the environment.
Year Completed |
1982 |
Dam Length |
2250 |
River Or Stream |
Tr-Crab Creek-Offstream |
Primary Dam Type |
Earth |
Surface Area |
115 |
Hydraulic Height |
27 |
Drainage Area |
0.03 |
Nid Storage |
200 |
Structural Height |
24 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
27 |
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.
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Othello Primary Treatment Pond 1a
Grant County