Connell Wastewater Lagoon 4 Reservoir Report
Last Updated: December 14, 2025
Connell Wastewater Lagoon 4, located in Connell, Washington, is a vital infrastructure managed by the local government.
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Summary
This lagoon, designed by John Wells, serves as a key component in the state's regulatory framework for water resource management. With a capacity of 109 acre-feet and a surface area of 10.1 acres, it plays a crucial role in treating wastewater and ensuring environmental sustainability in the region.
Constructed in 2009, Connell Wastewater Lagoon 4 is an earth dam with a height of 10 feet and a length of 1450 feet. It has a significant hazard potential but has been assessed to be in satisfactory condition. The lagoon undergoes regular inspections, with the last one conducted in April 2014. It is equipped with emergency action plans to mitigate any risks and ensure the safety of the surrounding community in case of unforeseen events.
Situated in Franklin County, Washington, this wastewater lagoon is an essential component of the local water infrastructure. Its close monitoring, inspection, and maintenance demonstrate the commitment to safeguarding water resources and the environment. As climate change continues to impact water supplies and infrastructure, the sustainable management of facilities like Connell Wastewater Lagoon 4 is crucial for ensuring water security and resilience in the face of evolving challenges.
Year Completed |
2009 |
Dam Length |
1450 |
River Or Stream |
Esquatzel Coulee-TR, OS |
Primary Dam Type |
Earth |
Surface Area |
10.1 |
Hydraulic Height |
10 |
Drainage Area |
0.06 |
Nid Storage |
109 |
Structural Height |
10 |
Hazard Potential |
Significant |
Foundations |
Soil |
Nid Height |
10 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Palouse River At Hooper
|
1030cfs |
Tucannon River Near Starbuck
|
174cfs |
Crab Creek Near Moses Lake
|
28cfs |
Yakima River At Kiona
|
23800cfs |
Walla Walla River Near Touchet
|
1040cfs |
Crab Creek At Irby
|
2cfs |
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.
Connell Wastewater Lagoon 4