12th Ave NW Basin Drainage Improvement
Project updates
Earlier in the year, we reached out to neighbors between 2nd and 3rd Avenues NW on NW 127th St and between 1st and 3rd Avenues NW on NW 130th St about the project’s natural drainage systems element. Now we’re reaching out to the broader community with an update on the overall 12th Ave NW Basin Drainage Improvement project.
We are still finalizing the natural drainage systems design. You can see the approximate location of the new walkways and natural drainage systems on our project website. Please note that construction of the natural drainage systems on NW 127th and 130th Streets has been rescheduled to incorporate walkways in the design. It will occur separately from the underground pipe construction work described below.
The underground detention pipe and conveyance project elements have reached 90% design. This portion of the project is located mostly along 10th Ave NW and 11th Ave NW between NW 120th and NW 125th streets and along NW 125th St to 6th Ave NW (shown on map). Construction of the pipe and conveyance elements is expected to start January 2022. Once we have a contractor on board, we will have more details about anticipated construction sequence, staging areas, impacts, and schedule.
Looking ahead
If you live along the side of the streets shown in the work area (see map) and have private encroachments in the right of way, like a planter, retaining system, or bollards, you may need to remove them prior to construction.
Additionally, if you have an improvement on the property line, like a fence, we may need to work with you to temporarily re-locate it during construction. If you are unsure about the property line location or whether you have encroachment in the work area, please reach out to us as soon as possible at SPU_BroadviewProjects@seattle.gov.
Direct replies to GovDelivery email messages will not be received by the project team. As always, if you have a question about the project, please feel free to contact us directly by emailing SPU_BroadviewProjects@seattle.gov.
Best,
Broadview Project Team
Map showing underground pipe and conveyance work area
