We built one noise wall (Wall 1-North) on the east side of I-5 in the Maple Leaf neighborhood. Check out our design mailer for more information about the final design of the wall.
This is Stage 2 of the I-5 / 5th Avenue NE to NE 92nd Street Noise Wall Project. Visit our common questions page for information about why Wall 1-South was removed from the project.
In early 2008, we completed preliminary design work, including identifying the location and height (pdf 316 kb) of the proposed noise wall, as well as modeling potential noise reduction benefits (pdf 430 kb).
The location of Wall 1-North is approximately in the same location as Sound Transit’s North Link light rail project. Due to this conflict, we used a newly available non-concrete noise wall product called Carsonite AcoustaShield (pdf 103 kb) rather than typical concrete for this noise wall. Carsonite is commercially available, lightweight, and could be disassembled and reused elsewhere when the light rail project moves ahead in this area in the future.
The use of a non-concrete type of noise wall is new and innovative for the state. We plan to monitor the condition (wear and tear) of the noise wall over time and evaluate the maintenance requirements and qualities.