Williams Lake Sewer Dist 2 Lagoons Reservoir Report
Nearby: Chapman Lake Dam Lower Turnbull Dam
Last Updated: December 13, 2025
Williams Lake Sewer District 2 Lagoons in Spokane, Washington, is a public utility owned facility regulated by the Washington Department of Ecology.
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Summary
This Earth dam structure was completed in 2007 and serves as a sewage treatment facility for the Williams Lake Offstream area. With a hydraulic height of 30 feet and a storage capacity of 59 acre-feet, the lagoons cover an impressive surface area of 10.2 acres.
Despite being rated as having a low hazard potential and not currently assessed for condition, the Williams Lake Sewer District 2 Lagoons play a crucial role in managing wastewater in the region. The facility, designed by Ramer & Associates, has a normal storage capacity of 39 acre-feet and is equipped with state-regulated permitting, inspection, and enforcement measures to ensure compliance with environmental standards. The lagoons provide an essential service to the community while maintaining a low risk profile.
Water resource and climate enthusiasts will appreciate the sustainable design and operational efficiency of the Williams Lake Sewer District 2 Lagoons. With a focus on public safety and environmental protection, this facility demonstrates a commitment to responsible sewage treatment practices. As a vital component of the region's infrastructure, the lagoons contribute to the overall health and well-being of the local ecosystem and residents, showcasing the importance of effective water resource management in mitigating environmental impact.
Year Completed |
2007 |
Dam Length |
1230 |
River Or Stream |
Williams Lake - Offstream |
Primary Dam Type |
Earth |
Surface Area |
10.2 |
Hydraulic Height |
30 |
Nid Storage |
59 |
Structural Height |
30 |
Hazard Potential |
Low |
Nid Height |
30 |
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.
Williams Lake Sewer Dist 2 Lagoons