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Salmon Creek Wastewater Treatment Plant
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Salmon Creek Wastewater Treatment Plant

Salmon Creek Wasterwater Treatment PlantThe Salmon Creek Wastewater Treatment Plant serves about 39,300 homes and businesses and an estimated 83,900 Clark County residents living inside the Clark Regional Wastewater District and the city of Battle Ground.

Public Works operates and maintains the plant, along with its pump stations and regional interceptor sewer lines. The department’s goal is to operate the system in a safe, dependable and cost-effective manner that meets all environmental regulations.

The Washington State Department of Ecology this year recognized the plant for 100 percent compliance with laws and regulations to protect the environment. The award marks the eighth year in a row the Salmon Creek plant has been recognized for perfect compliance. It also is the 15th time the plant has received the award since the program began in 1995.

The plant's capacity is 14.95 million gallons a day, considerably more than its average daily flow of 7.35 million gallons in 2014.

In June 2014, the Board of County Commissioners agreed to transfer the plant to the Discovery Clean Water Alliance, a regional sewer partnership involving Clark County, Clark Regional Wastewater District and the cities of Battle Ground and Ridgefield.

The transfer took place at the start of 2015, although Clark County will continue to operate the plant for at least another five years, through 2019.

The following summarizes treatment plant staffing for the 2015-16 biennium:

Position Full-time equivalents
Custodial Aide
Laboratory Analyst
Office Assistant 2
Solids Program Coordinator
Wastewater Maintenance Leadworker
Wastewater Maintenance Technician 2
Wastewater Operations Leadworker
Wastewater Operations Manager
Wastewater Operator 2
Wastewater Operator 3


Sewage treatment process at Salmon Creek Wastewater Treatment Plant.

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