Thornton Creek Bridge Study
Updated February 2020
What's Happening Now?
Thanks to those of you who provided feedback throughout this process. Comments and suggestions from the community informed the development of the conceptual design alternatives.
Currently, we're funded only through 30% design. This planning study will be used to help the City of Seattle plan for the funding needed for future bridge replacements.
Study Background
Over an 8-month period, bridge alternatives were evaluated considering multimodal transportation needs, short- and long-term residential impacts, waterflow capacity, environmental impacts, bridge maintenance, and cost. Based upon these criteria, replacement is the most feasible option for all 4 bridges.
Project Overview
In 2019, we studied 4 bridges that cross the Thornton Creek Channel:
Bridge 105 is on NE 110th St, 200 feet east of the intersection with 35th Ave NE
Bridge 115 is on 39th Ave NE, 120 feet north of the intersection with NE 105th St
Bridge 104 is on NE 105th St, at the intersection of 40th Ave NE
Bridge 109 is on 45th Ave NE, 70 feet south of the intersection with NE 97th SE
Various experts visited each bridge to study its current condition and wrote a report detailing their findings. These experts examined many factors, including the structure of the bridges, the condition of the soil beneath them, the flow of the creek, and the potential environmental impacts of any work. We completed this study to 30% design in February 2020.
Project Location
Funding
This study has been funded through early planning. Funding for design and construction will be evaluated following a review by the Levy to Move Seattle Oversight Committee.
Thornton Creek Bridge Study Outreach
| Date | Event |
| February 28, 2020 | Tabling event for the public - Meadowbrook Community Center |
| February 27, 2020 | Briefing for Meadowbrook Community Council and Thornton Creek Alliance - Meadowbrook Community Center |
| September 10, 2019 | Briefing for Meadowbrook Community Council - Meadowbrook Community Center |
| August 21, 2019 | Open House - Saint Anne Nursing and Rehabilitation Center |
| August 20, 2019 | Open House Meadowbrook Community Center |
| August 8, 2019 | Invite Mailer |
| April, 2019 | Door to door outreach |
Materials - Planning Phase
- 30% design folio (February 2020)
- Outreach summary (February 2020)
- Drop-in session summary (August 2019)
- Drop-in session display boards (August 2019)
- Drop-in session postcard (August 2019)
- Factsheet (April 2019)
Get Involved
We're committed to working with all project neighbors and stakeholders. If the Thornton Creek Bridges Study advances to the next phase, we'll reach out and keep you informed. To sign up for email updates on the project, please contact our communication lead, Darrell Bulmer at Darrell.Bulmer@seattle.gov.