Seattle Public Utilities

Pump Station 43 - Emergency Force Main Replacement

  • Salmon Once completed, the new sewer force main will provide reliable sewer service to the Ballard community and will help improve water quality to create healthier fish habitat in the waterway.
  • Project Site The sewer force main will be located just west of the railroad bridge underwater. The red boxes above indicate approximate staging locations on either side of the waterway. The staging locations may change as we better refine the pipe alignment.
  • Sewer Bypass A hard-piped sewer bypass system is in place along the Burke-Gilman Trail to prevent sewage from flowing into the waterway before the new sewer force main is constructed.

What & Why

In fall 2017, Seattle Public Utilities discovered that a sewer force main connected to Pump Station 43 in Ballard was damaged. The force main runs underneath the Shilshole Bay Waterway west of the Ballard Locks. SPU took immediate action to bypass the pipe and prevent and additional sewage from flowing into the waterway. After further investigation, crews found that the pipe was significantly cracked, with large holes and was badly corroded. Instead of attempting multiple, short-term spot repairs, SPU decided to replace the entire force main in order to provide reliable sewer service to residents well into the future and to better protect aquatic habitat and public health.

What's happening now?

5501 Seaview Ave NW work area (Ballard)

In early March, the contractor will begin drilling underneath the waterway to Magnolia to create a path for the new sewer force main.

Near-term anticipated impacts

  • Construction dust, noise, vibrations
  • Restricted parking in/near work zone
  • One entryway off Seaview Avenue Northwest to the gravel frontage road to be closed
  • The southbound lane of Seaview Avenue Northwest closed for about 200 feet near 5501 Seaview Avenue NW. The Burke-Gilman Trail detoured in the same area to the north side of Seaview Avenue Northwest. Two-way traffic is maintained on the roadway and trail via an electronic traffic signal.

3500 W Commodore Way wok area (Magnolia)

The contractor will dig the drill receiving pit in early March. As early as March 18, the contractor will begin installing the new sewer pipe.

Near-term anticipated impacts

  • Construction dust, noise, vibrations
  • Restricted parking in West Commodore Way
  • West Commodore Way to be closed near 3500 W Commodore Way for up to one week during pipe installation work. Local access will be maintained. Through traffic will be detoured around the site in a loop along West Fort Street, Gilman Avenue West, West Government Way and Texas Way. 

Project goals and benefits

Once completed, the new sewer force main will provide reliable sewer service to the Ballard community and will help improve water quality and create healthier fish habitat in the waterway.

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Cody Nelson, Project Manager
Cody.Nelson@seattle.gov
(206) 684-3066