12th Ave NW Basin Drainage Improvement – October project update
Project Update, October 2022
Hello Broadview community! Last month, we were excited to share updates about the first month of construction in the 12th Ave NW Basin Drainage Improvement project, as well as updates on the design of the Natural Drainage System element of the project. Since then, construction has continued, and the contractor has completed or made progress on the following tasks:
- Adjusted a water main at 10th Ave NW and NW 125th St that conflicted with the new drainage system
- Continued installation of the new drainage system on NW 125th St between 10th Ave NW and 9th Ave NW
- To resolve a conflict between the old and new drainage systems, the contractor began installing a segment of new drainage system on the northern part of 10th Ave NW up to NW 125th St. This work along 10th Ave NW should be done by mid-month.
Throughout the month of October, the contractor plans to work on the following tasks:
- Continue drainage system installation on NW 125th St towards 6th Ave NW
- Complete drainage system installation on the northern section of 10th Ave NW
- Replace a section of water main north of the intersection at NW 125th St and 7th Ave NW. Some homes may experience temporary water outages and impacted residents will be notified directly.
- Maintenance hole installation on 11th Ave NW at the southern limit of the project
- Pavement restoration along NW 125th St
The contractor started the underground work at the intersection of 10th Ave NW and NW 125th St, and their plan is to continue working eastward along NW 125th St until reaching 6th Ave NW. Following that, they will relocate to 11th Ave NW, moving northward along 11th Ave NW between NW 120th St and NW 122nd St. They will then work along NW 122nd St between 11th and 10th Ave NW. The last leg of construction will then take place along 10th Ave NW, between NW 122nd St and NW 125th St. Please see the highlighted area on the map below for the work areas.
The contractor will soon be staging two large water treatment tanks within the project area’s right-of-way, most likely along NW 122nd St. These tanks will minimize project-related sediment pollution by removing sediment from water used during construction before the water is discharged into the system. We will reach out directly to homes that are near where the tanks will be staged.
The underground work is expected to be complete in 2022. Final paving is weather dependent and planned for early 2023. Work will take place Monday through Friday, from 7am to 4pm.
Map showing underground pipe and conveyance work area
Construction Safety is Everyone’s Job, check out some top safety tips at: www.seattle.gov/utilities/constructionsafety
Natural Drainage System Project Update
The project team is close to reaching 90% design completion on the Natural Drainage System (NDS) project elements. The project team will be reaching out to residents in the immediate project area in the next month, and will be providing opportunities for the broader community to learn more about the NDS project in the upcoming months.
Looking ahead
We will continue sending monthly email updates with the latest information about the anticipated project schedule, construction progress, and impacts. Please encourage your neighbors to sign up by visiting our project website.
If you live near the Natural Drainage System portion of the project, please keep an eye out for a mailer or email update with opportunities to connect with the project team and learn more about the upcoming NDS construction.
Thank you!
We want to thank you for your patience during construction. We know construction can be disruptive, and we appreciate your understanding as we work to complete this necessary upgrade to your neighborhood’s drainage system. We always strive to make our projects as easy on the community as possible.
As always, if you have a question about the project, please feel free to contact the project manager directly by emailing Wan-Yee Kuo at Wan-Yee.Kuo@seattle.gov
Best,
Broadview Project Team
