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New pipes will be installed using both trenchless and open cut construction methods. Work will also include dewatering operations and pipeline decommissioning. The areas where work will occur for the project are listed below from north to south.

Click on the overview map to view project areas and details. Select project areas (A to G) to view construction status and to sign up to receive project update emails.

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Contact us

Call the project information line at  206-205-9795.

Email David Freed, community services lead:  david.freed
@kingcounty.gov

Project area

Construction Updates: view project home page.

1501_TILE_A1501_TILE_LEGEND_350

Work here will include pipe ramming under North Creek and open cut construction to tie the new pipe section into the existing one within 14th Drive Southeast. Pipe ramming below the creek bed minimize environmental disruption to North Creek. (More details about the work schedule and duration will be provided when available.)

Expected impacts:

  • Prior to construction, an access pit will need to be dug and dewatering and monitoring wells installed.
  • Pipe ramming under the creek will result in noise and vibrations.
  • Construction will include increased noise, dust, and vibrations.
  • Access to the work for construction vehicles and open cut work will be along 14th Drive Southeast.
  • There will be times when the street will be closed to through traffic. At other times some services such as mail delivery or school bus routes will need to be modified.

Construction Updates: view project home page.

1501_TILE_B_6501502_TILE_LEGEND

Work here will include pipe ramming under North Creek which is meant to minimize environmental disruption to the creek. (More details about the work schedule and duration will be provided when available.)

Expected impacts:

  • Prior to pipe ramming, an access pit will need to be dug and dewatering and monitoring wells installed.
  • Access to the pipe ramming pit on the east side of North Creek will be through multi-family complexes.
  • Construction will include increased traffic, noise, dust, and vibrations.

Construction Updates: view project home page.

1501_TILE_C_6501502_TILE_LEGEND

Pipe ramming will be used to bring the sewer line under 208th (SR-524) at 14th Drive; this will limit traffic disruptions. The pipe will then go east on the south side of 208th Street Southeast. Pipe ramming, tunneling and open trench work could all be used to install this portion of pipe. (More details about the work schedule and duration will be provided when available.)

Expected impacts:

  • Prior to construction, access pits will need to be dug and dewatering and monitoring wells installed.
  • Construction will include increased traffic, noise, dust, and vibrations.
  • Portions of the existing North Creek interceptor will no longer be needed and will be decommissioned..

Construction Updates: view project home page.

The North Creek trail will be closed during construction.

1501_TILE_D_650 Map Legend

Between 208th Street Southeast and 214th Street Southeast, the pipeline will be built using open trench methods. (More details about the work schedule and duration will be provided when available.)

Expected impacts:

  • Prior to construction access roads, work areas, and dewatering and monitoring wells will need to be installed.
  • Construction will include increased traffic, noise, dust, and vibrations.
  • Sections of the recently-constructed North Creek trail will need to be temporarily closed during construction.  
  • Disturbed areas of the trail and wetlands will be restored.
  • Portions of the existing North Creek interceptor will no longer be needed and will be decommissioned.

Construction Updates: view project home page.

1501_TILE_E
Map Legend

Tunneling will be used to build the pipe under the Bothell-Everett Highway and entering the Canyon Park Business Center at 214th Street Southeast. This will limit disruptions at this busy intersection. (More details about the work schedule and duration will be provided when available.)

Expected impacts:

  • Prior to construction access roads, work areas, and dewatering and monitoring wells will need to be installed.
  • Construction will include increased traffic, noise, dust, and vibrations.
  • Portions of the existing North Creek interceptor will no longer be needed and will be decommissioned.

Construction Updates: view project home page.

1501_TILE_F_650Map Legend

Pipeline tunneling continues south from the corner of 214th Street Southeast and 20th Avenue Southeast. Just north of the 220th Street Southeast intersection, open trench construction will begin and extend south along 20th Avenue South, then east along 222nd and 223rd streets southeast.

Just before the pipeline reaches 29th Drive Southeast, tunneling will start again and the pipeline will turn south on private property, ending at an already-constructed section of the pipeline. (More details about the work schedule and duration will be provided when available.)

Expected impacts:

  • Both tunneling and open cut construction methods will be used to install the pipeline.
  • Work will be scheduled at night or on weekends at some of the busier intersections within the business center.
  • Prior to construction work areas, and dewatering and monitoring wells will need to be installed.
  • Construction will include increased traffic, noise, dust, and vibrations.
  • Some community transit stops will need to be closed temporarily and the buses re-routed.
  • Portions of the existing North Creek interceptor will no longer be needed and will be decommissioned.

Construction Updates: view project home page.

1501_TILE_G
Map Legend

A small section of work will take place in 228th Street Southeast where the new pipe will be connected to the existing pipeline. Work here will be done at night or on weekends to avoid impacting traffic. (More details about the work schedule and duration will be provided when available.)

Expected impacts:

  • Construction will involve a work area within 228th Street Southeast.
  • Work will be scheduled at night or on weekends to lessen traffic impacts.
  • Prior to construction dewatering and monitoring wells will need to be installed.
  • Construction will include increased traffic, noise, dust, and vibrations.
  • Some community transit stops will need to be closed temporarily and the buses re-routed.
  • Portions of the existing North Creek interceptor will no longer be needed and will be decommissioned.