NW 120th Street Outfall and Drainage Improvements Project Update

You’re invited:
Seattle Public Utilities (SPU) has finished design of the NW 120th Street and 9th Avenue NW Outfall and Drainage Improvements Project and will begin construction in August 2016. The project team will host a walk and talk from 5:30 – 6:30 p.m. on Wednesday, July 20, to answer questions about the project and to discuss construction impacts. We will meet at the corner of 9th Avenue NW and NW 120th Street. See attached flyer for more information.

Project background:
A drainage outfall at the west end of NW 120th Street into Mohlendorph Creek began failing in 2006, and failed completely in 2011. Although a temporary fix has been installed, Seattle Public Utilities (SPU) must replace the outfall in order to help maintain slope stability and public safety. In addition to outfall failure, there is ongoing localized flooding in the right of way and on private properties along 9th Avenue NW and NW 120th Street causing damage to homes.

The NW 120th Street and 9th Avenue NW Outfall and Drainage Improvements Project will replace the failed outfall and make stormwater conveyance improvements to reduce storm-related flooding along NW 120th Street and 9th Avenue NW. Additionally, the project will make ditch improvements along NW 120th Street near 7th Avenue NW and between 8th and 9th Avenue NW. Construction is scheduled to start August 2016 and will take about three months to complete.

Please forward these updates to others who may be interested in the project.  We continue to encourage people to sign up directly to get future project updates at: http://www.seattle.gov/lists/spu_nw120th.htm.

For more information, please contact Arnel Valmonte, Project Manager, at (206) 615-1438 or arnel.valmonte@seattle.gov.

Link to flyer: map


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