Maple Heights Bridge Seismic Retrofit

Map this project on the interactive project overview story map.

The seismic retrofit work will address current seismic vulnerabilities by improvements to the bridge girder abutment seats. It will also address drainage and expansion joint issues.

During construction the contractor will make every effort to keep the bridge open either by shifting lanes or by alternating traffic to one lane to cross the bridge. For brief periods of time, the contractor may have to close the bridge to move equipment into place. We ask motorists, bicyclist and pedestrians to be vigilant in their awareness of current signage and be patient as we complete our first project of our Mukilteo Blvd corridor improvements.

  1. Purpose
  2. Background
  3. Timeline
  4. Contact

The existing three-span 300-foot bridge, built in 1979, is generally in good condition. The bridge is not in need of replacement but has some seismic vulnerabilities that need to be addressed. The bridge is one of three bridges along Mukilteo Boulevard that provide vital access to the Boulevard Bluffs neighborhood. The loss of any combination of two bridges along this section of Mukilteo Boulevard due to a major seismic event would result in potential isolation for parts of the neighborhood. The City is focusing on this bridge and the Edgewater Bridge as part of our earthquake hazard mitigation efforts.