Salmon Creek Treatment Plant Improvements Project
The treatment plant is a vital part of the wastewater system—safeguarding public health, environmental quality and our community's economic future. This project will provide for a modest increase in treatment capacity and improve odor containment and treatment for the facility.
The Salmon Creek Wastewater Treatment Plant receives and treats roughly 8–10 million gallons of wastewater per day from homes and businesses. All wastewater received at the plant is treated to a high standard before clean water, or effluent, is conveyed and discharged into the Columbia River. As our community grows, we will need to expand the plant's treatment capacity to meet the increasing flow of wastewater.
Adrienne DeDona, Public Outreach Manager, can be contacted at (360) 903-4792.
Project information can be provided in other formats or languages upon request.
Salmon Creek Treatment Plant Improvements Project Fact Sheet (PDF, 1.36 MB)
Engineering Report for Salmon Creek Treatment Plant Improvements Project, including Salmon Creek Treatment Plant Phase 4 Odor Control Update (Appendix C) & Tier II Antidegradatiion Analysis (Appendix D) (PDF, 6.53 MB)
- SEPA Determination of Non-Significance Package, including Distribution List, Determination of Non-Significance & State Environmental Policy Act (SEPA) Checklist (PDF, 3.65 MB)
- Reference Documents
- 2017 Wetland and Stream Delineation and Assessment (PDF, 47.6 MB--very large file)
- 2013 Salmon Creek Wastewater Management System Wastewater Facilities Plan/General Sewer Plan Amendment (PDF, 26.3 MB--very large file)
- 2009 Salmon Creek Wastewater Treatment Plant Re-rating Study (PDF, 627 kb)
- 2004 Salmon Creek Wastewater Management System Wastewater Facilities Plan/General Sewer Plan (PDF, 21.8 MB--very large file)
- 1995 Salmon Creek Wastewater Treatment Plant Final Environmental Impact Statement (PDF, 25.9 MB--very large file)