SNOFLO
 



SACHEEN LAKE WWTP LAGOONS

RESERVOIR LEVELS

April 26, 2025


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Sacheen Lake Wwtp Lagoons, located in Pend Oreille, Washington, is a water resource facility under the jurisdiction of the Washington Dept of Ecology. Completed in 2016, the lagoons serve as a vital component of the state's water management system, with a primary purpose listed as "Other." The lagoons have a structural height of 15 feet and a hydraulic height of 13 feet, providing a storage capacity of 120.6 acre-feet and a normal storage level of 38 acre-feet.

The facility covers a surface area of 10.13 acres and has a drainage area of 0.02 acres, with a high hazard potential and fair condition assessment. The last inspection date conducted in August 2021 revealed a need for regular monitoring and maintenance, with an inspection frequency of 5 years. Despite the high hazard potential, the lagoons have not been modified since their completion and do not feature any outlet gates or associated structures.

In the event of an emergency, the facility's Emergency Action Plan (EAP) status and preparedness remain undisclosed, raising concerns about the ability to effectively manage risks and respond to potential incidents. As water resource and climate enthusiasts, it is essential to monitor and advocate for the maintenance and improvement of critical infrastructure like Sacheen Lake Wwtp Lagoons to ensure the safety and sustainability of our water resources in Washington state.

Year_Completed 2016
Dam_Length 3169
Primary_Dam_Type Earth
Surface_Area 10.13
Hydraulic_Height 13
Drainage_Area 0.02
Nid_Storage 120.6
Structural_Height 15
Hazard_Potential High
Nid_Height 15
       

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