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WSDOT project staff, noise experts and members of the Green Lake and Licton Springs neighborhoods
met to talk about noise wall specifics.
June 2009
Stage 1 :
- Crews have finished installing all three noise walls that are part of Stage 1 of this project. Check out our latest construction flier for more information.
Stage 2:
- We have completed the final design for Wall 1-North on the east side of I-5 between NE 92nd Street and NE 85th Street. Check out our design mailer for more information. Stage 2 construction is anticipated to begin in fall 2009.
Stage 1: WSDOT designed three noise walls along the west side of I-5 between 5th Avenue NE and NE 92nd Street in North Seattle. Construction of these walls began in July 2008 and is scheduled to complete in spring 2009.
Stage 2: Over the next few months, we’ll be finalizing the design of a noise wall (Wall 1-North) on the east side of I-5 in this area. In summer 2009, the project will be advertised for competitive bids to contractors.
Why is WSDOT
constructing noise walls in this area?
Residents of Seattle's Maple Leaf, Licton Springs and north Green Lake neighborhoods who live near I-5 experience high noise levels. When we built I-5 in the 1960s, noise was less of a concern, largely because there was less traffic. Since then, noise levels increased significantly as traffic grew. Today, these neighborhoods are high priorities on our statewide noise retrofit list.
The End Result
Nearby residents will experience a reduction in freeway traffic noise. Noise walls constructed in this area will reduce noise levels by up to half in areas closest to the walls.
Project Benefits
Noise Reduction: Noise walls are designed to provide a minimum five decibel reduction in average background traffic noise for the first row of residences located directly behind the wall, with up to a seven decibel reduction in at least one location.
The noise walls constructed in these neighborhoods will reduce noise by up to 10 decibels in some areas. To the human ear, a 10 decibel reduction sounds half as loud as the original noise level. Other areas near the walls will notice a reduction in noise even with just a three decibel reduction.
What is the project timeline?
Stage 1:
- 2005-2007: Planning phase.
- 2007-2008: Design noise walls and complete community polling process.
- 2008-2009: Construction of west side noise walls. Construction of Stage 1 began in July 2008. The project is scheduled to complete in spring 2009.
Stage 2:
- 2005-2007: Planning phase. With support from legislators and the Maple Leaf community in early 2007, WSDOT postponed the design and construction of the proposed noise wall on the east side of I-5.
- 2008: Design east side noise wall and conduct community poll with property owners.
- 2009-2010: Begin construction of Wall 1-North in summer/fall 2009.
Financial Information
The project is funded by the following sources:
The information shown reflects the current proposed budget and schedule. The 2009 Legislature may consider changes to the transportation budget that may include adjustments to some project budgets and schedules.
How can I get more information?
Contact:
Erin Fletcher
WSDOT Project Engineer
206-770-3504
fletche@wsdot.wa.gov
Michell Mouton
WSDOT Communications
206-464-1249
moutonm@wsdot.wa.gov
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