Waitt Lk Valley Sewage Treatment Lagoon Reservoir Report
Last Updated: December 6, 2025
Located in Stevens County, Washington, the Waitt Lake Valley Sewage Treatment Lagoon is a crucial infrastructure owned by the local government.
°F
°F
mph
Wind
%
Humidity
Summary
This sewage treatment facility is regulated and permitted by the Washington Department of Ecology, ensuring that it meets state standards for environmental protection. Completed in 1998, the lagoon has a hydraulic height of 10 feet and a storage capacity of 109 acre-feet, with a normal storage level of 78 acre-feet.
The primary purpose of the Waitt Lake Valley Sewage Treatment Lagoon is to manage wastewater in an earth dam structure, serving as a vital component in maintaining water quality in the region. Despite its low hazard potential, the facility has not been rated for its condition assessment. With a surface area of 7.91 acres, the lagoon plays a key role in treating sewage from the surrounding area and ensuring safe water discharge into the Colville River. Climate and water resource enthusiasts will find this infrastructure essential in understanding how wastewater is managed in a sustainable and environmentally responsible manner.
Year Completed |
1998 |
Dam Length |
2170 |
River Or Stream |
Colville River - Offstream |
Primary Dam Type |
Earth |
Surface Area |
7.91 |
Hydraulic Height |
10 |
Nid Storage |
109 |
Structural Height |
10 |
Hazard Potential |
Low |
Nid Height |
10 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
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.
Waitt Lk Valley Sewage Treatment Lagoon