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

King Street Center
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

Get Directions to our office location in Seattle, Washington.

Staff Contacts

Puget Sound shoreline next to the West Point Treatment Plant, Seattle

Ballard Siphon replacement project

Map

Ballard Siphon Project Map

The Ballard Siphon is a set of two wooden sewer pipes nested deep in the sediment of Salmon Bay. The active sewer pipeline is located between the end of 20th Avenue Northwest in Ballard and the former Marco Shipyard on the Magnolia side. View conceptual profile of this project.