Denny Way/Lake Union CSO Project - completed Spring 2005

Elliott West CSO Control Facility
545 Elliott Ave. W., Seattle

Welcome to the Denny Way/Lake Union Combined Sewer Overflow Control Project.

This project is a joint effort of King County and the City of Seattle to control combined sewer overflows (CSOs) into Lake Union and Elliott Bay. CSOs are overflows of sanitary (residential and commercial) sewage and stormwater that are released into water bodies during storms.

Under way since May 2000, construction is now complete. This Web site contains details about the project, news and updates, and other information.

Dedication ceremony held Thursday, July 7, 2005

What's New

July 2005 Newsletter

King County Wastewater Treatment Division Director Don Theiler addresses the crowd.
>> more photos

After nearly 12 years of planning and more than four years of construction, the Denny Way/Lake Union Combined Sewer Overflow Control Project is complete. This joint project with the City of Seattle is one of the most significant public investment efforts undertaken by King County and the largest of all county CSO control systems.

We celebrated the project completion with a dedication ceremony Thursday, July 7, at the new Elliott West CSO Control Facility, 545 Elliott Ave. W.

We want to express our appreciation to members of the community, organizations and businesses affected by construction -- and to agencies, officials, employees and companies that supported this major effort to protect public health and the environment.

Elliott West CSO Control Facility

Photos & Drawings Signs Document Library Help

For more information, please contact John Phillips by e-mail or at 206-263-6543.

For questions about the Wastewater Treatment Division Web site, please send an e-mail message. For general information about the division, contact us at:

Department of Natural Resources and Parks
Wastewater Treatment Division
201 S. Jackson St., Suite 505
Seattle, WA 98104-3855
Phone: 206-684-1280
Fax: 206-684-1741
Telecommunication device for the deaf (TTY): 711

Updated: Aug. 24, 2005

Also of Interest:
King County's Combined Sewer Overflow Control Program

Henderson/Martin Luther King Jr./Norfolk CSO Control Project

Public Art -- 4 Culture
(external link)

Links to external sites do not constitute endorsements by King County.
By visiting this and other King County Web pages, you expressly
agree to be bound by terms and conditions of the site.
The details.