Fairfield Sewage Equalization Basin - Lagoon 2 Reservoir Report
Last Updated: December 15, 2025
Fairfield Sewage Equalization Basin - Lagoon 2, located in Spokane, Washington, serves as a crucial facility for managing wastewater in the area.
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Summary
Owned by the local government, this structure plays a significant role in regulating and treating sewage to protect the environment and public health. Completed in 1966, the Earth dam has a hydraulic height of 12 feet and a surface area of 6.4 acres, providing a storage capacity of 18 acre-feet.
With a significant hazard potential, Fairfield Sewage Equalization Basin - Lagoon 2 is regularly inspected to ensure its fair condition and compliance with state regulations. The dam's purpose goes beyond traditional water resource management, serving as a key element in the region's infrastructure for wastewater treatment. The facility's location near Rattler Run Creek underscores its importance in safeguarding local water resources and the surrounding ecosystem.
As climate change continues to impact water availability and quality, structures like Fairfield Sewage Equalization Basin - Lagoon 2 become increasingly vital in managing water resources sustainably. With state permitting, inspection, and enforcement in place, this facility exemplifies the commitment to maintaining a resilient and efficient wastewater management system in Fairfield, Washington.
Year Completed |
1966 |
Dam Length |
650 |
River Or Stream |
Rattler Run Creek-Offstream |
Primary Dam Type |
Earth |
Surface Area |
6.4 |
Hydraulic Height |
12 |
Drainage Area |
0.01 |
Nid Storage |
18 |
Structural Height |
11 |
Hazard Potential |
Significant |
Foundations |
Soil |
Nid Height |
12 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Hangman Creek At State Line Road Near Tekoa
|
37cfs |
Coeur D Alene River Nr Harrison Id
|
47cfs |
Hangman Creek At Spokane
|
97cfs |
Spokane River At Spokane
|
18600cfs |
St Joe River Nr Chatcolet Id
|
802cfs |
Spokane River Nr Post Falls Id
|
20800cfs |
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.
Fairfield Sewage Equalization Basin - Lagoon 2