Quincy Sludge Storage Lagoon System Lagoons 1 2 And 3 Reservoir Report

Last Updated: December 15, 2025

The Quincy Sludge Storage Lagoon System, consisting of Lagoons 1, 2, and 3, is a vital water resource management infrastructure owned by the local government in Grant County, Washington.


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Summary

This system is regulated and permitted by the Washington Dept of Ecology, ensuring compliance with state regulations and enforcement measures. Completed in 1986, these earth dams have a hydraulic height of 15 feet and a length of 1370 feet, serving a drainage area of 0.01 square miles.

With a significant hazard potential and fair condition assessment as of the last inspection in August 2019, the Quincy Sludge Storage Lagoon System presents a critical aspect of water management in the region. The lagoons serve as a storage facility for sludge, with a primary purpose identified as "Other." Despite the lack of associated structures and limited storage capacity, the system plays a crucial role in managing waste and protecting water quality in the area.

Located in Congressional District 04 of Washington, these lagoons are essential for ensuring proper waste management and environmental protection. With a regular inspection frequency of 5 years, the Quincy Sludge Storage Lagoon System remains a key component in the state's water resource infrastructure, showcasing the ongoing commitment to maintaining water quality standards and mitigating potential risks associated with the facility.

Year Completed

1986

Dam Length

1370

Primary Dam Type

Earth

Hydraulic Height

15

Drainage Area

0.01

Hazard Potential

Significant

Nid Height

15
       
Seasonal Comparison

Weather Forecast

Dam Data Reference

Condition Assessment

Satisfactory
No 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

High
Dams 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.