Summary
Built in 1986, this Earth dam structure stands at a height of 18.5 feet and has a storage capacity of 123 acre-feet. The lagoon serves the purpose of treating industrial waste, with a low hazard potential and a needle outlet gate system.
Despite not being rated for condition assessment, Weston Eda Wwt Lagoon undergoes inspections every six years to ensure its operational effectiveness and safety. The facility is equipped to handle emergencies, although specific emergency action plans and risk assessments are not currently available. With its strategic location in the Walla Walla District and within the jurisdiction of the state, Weston Eda Wwt Lagoon plays a crucial role in managing water resources and addressing climate-related challenges in the region.
Year Completed |
1986 |
Dam Height |
18.5 |
River Or Stream |
INDUSTRIAL WASTE |
Primary Dam Type |
Earth |
Surface Area |
7 |
Nid Storage |
123 |
Outlet Gates |
Needle |
Hazard Potential |
Low |
Nid Height |
19 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Umatilla River Above Meacham Creek
|
148cfs |
Meacham Creek At Gibbon
|
215cfs |
Umatilla R At W Reservation Bndy Nr Pendleton
|
313cfs |
Mill Creek At Walla Walla
|
185cfs |
Mill Creek Near Walla Walla
|
65cfs |
Walla Walla River Near Touchet
|
741cfs |
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.
Weston Eda Wwt Lagoon