Carnation Wastewater Treatment Facility

Project Background

Siting Process

Facility Alternatives

Project Library

Project Library

The Adobe Acrobat reader is required to view .pdf files linked off of this page. You can obtain a free copy by visiting Adobe's Web site.

• Project updates
• Brochure (new!)
• Design, including facilities plan and treatment plant layout/design
• Environmental documents
• Technical reports
• News releases (on separate Web page)

Project Updates

Carnation Wastewater Treatment Facility Project Update,
Spring/Summer 2008 (555KB)

Carnation Wastewater Treatment Facility Project Update,
Winter/Spring 2008 (1MB)

View the tour handout of the City of Carnation Wastewater Treatment System. Presented to the Metropolitan Water Pollution Abatement Advisory Committee (MWPAAC) Engineering and Planning (E&P) subcommittee.
September 26, 2007

Carnation Wastewater Treatment Facility Project Update,
December 2006 (375KB)

Carnation Wastewater Treatment Facility Project Update,
June 2006 (318KB)

Carnation Wastewater Treatment Facility Project Update,
Spring 2006 (645KB)

Carnation Wastewater Treatment Facility Project Update,
September 2005 (842KB)

Carnation Wastewater Treatment Facility Project Update
April 2005 (584KB)

Carnation Wastewater Treatment Facility Project Update.
Jan. 2005 (5.7MB)

Posters at community open house (Sept. 9, 2004):

• Proposed Alternatives for the Carnation Wastewater Treatment Facility
  Sept. 9, 2004 (167KB)
• Carnation Treatment Plant Decision Factors
  Sept. 9, 2004 (69KB)
• Comparision of Treatment Plant Site Options
  Sept. 9, 2004 (34KB)
• Comparison of Discharge Options
  Sept. 9, 2004 (35KB)

King County/City of Carnation Wastewater Treatment Plant Decision Process,
March 15, 2004 (88KB)

Carnation Wastewater Treatment Facility Project Update.
Fall/Winter 2003 (744KB)

Brochures

Carnation Sewer System Owner's Manual, April 2008 (934KB)
This brochure provides sewer tips (including care of the candy cane-shaped air vent in your yard and what is appropriate to put in your toilet and drain) and information on household hazardous waste disposal.

Design

Final Facilities Plan, Carnation Wastewater Treatment Facility, October 2005

Operations Building Design, revised Sept. 22, 2005 - Carnation Wastewater Treatment Facility (41KB)

Proposed Carnation Wastewater Treatment Facility layouts, presented at the Jan. 26, 2005 public meeting.

• Preferred Site Plan - Carnation Wastewater Treatment Facility
  JPEG (77 KB), PDF (853KB)
• Perspective Models of Existing and Proposed Buildings - Carnation Wastewater Treatment Facility
  JPEG (61 KB), PDF (825KB)
• Preliminary Site Plan - Carnation Wastewater Treatment Facility
  JPEG (38 KB), PDF (195KB)

Environmental Documents

Carnation Sewer Collection and Conveyance System and Wastewater
Treatment Facility Environmental Assessment (EA) and Finding of No Significant Impact (FONSI), September 2005

Existing Water Quality Conditions in the Snoqualmie River Near the City of
Carnation: 2003-2004 Monitoring Results, April 2005 (792KB)

Environmental Impact Statement (EIS) - Carnation Wastewater Treatment Facility

• Addendum 1 to Final EIS, issued Nov. 15, 2006
• Final EIS, issued Oct. 15, 2004
• Public Information Document, October 2004
• EIS Scoping Comments Summary Report, September 2003 (60KB)
• Draft EIS, issued June 28, 2004

Technical Reports

City of Carnation, Wastewater Treatment Plant, Siting Process Summary Memorandum, July 9, 2003
This memorandum, presented to the Carnation Wastewater Treatment Plant Citizens Advisory Committee on July 9 2003, identifies wastewater treatment system alternatives. Each system alternative will consist of three elements: 1) a treatment plant site, 2) highly-treated wastewater (effluent) conveyance system, and 3) an effluent discharge site, either upland discharge or river discharge. These wastewater treatment system alternatives will be evaluated in more detail in the Environmental Impact Statement (EIS). Engineering evaluations of the system alternatives will be completed in support of the EIS document, along with scientific and regulatory evaluations.

Technical Memorandum (text portion 216KB)
   Figures for this memorandum
   Appendix A (104KB)
   Appendix B (4.5MB)
   Appendix C (6.5MB)
   Appendix D (6.7MB)

King County Wastewater Service to the City of Carnation, September 2001
Source: Wastewater Treatment Division Conveyance System Improvement Program.
This report presents an alternative financing proposal to the City of Carnation for King County to provide wastewater treatment services to the city under a contract similar to the county’s other component agencies.

Report (1.3MB)