I-405: I-5 to SR-167 Stage I Widening D/B

Aerial photo: I-405: I-5 to SR-167 Stage I Widening D/B

PBS provided on-site full-time environmental compliance inspection and is acting as the environmental compliance manager on the 1-405, I-5 to SR-167 Stage I Widening Design-Build Project. The project will add one northbound and one southbound lane to I-405 between I-5 and SR-167, one southbound lane on SR 167 between I-405 and S 180th Street, and extend the southbound SR-167 HOV lane from I-405 to the existing start of the HOV lane.

As the first stage in a long-range plan, this project will reduce the congestion on and increase the capacity of I-405 between I-5 and SR-167. The additional lanes on I-405 will increase the I-405 general purpose roadway capacity by fifty percent. Interchange improvements will also relieve congestion.

PBS’ team has worked full-time from the Renton field office to facilitate compliance with permits, interagency agreements/memorandums, and agency directives. In 2010, PBS received the WSDOT Partnership for Environmental Excellence in Construction Management Award for the work we did on this project.

Client:
Washington Department of Transportation
Seattle, Washington

Scope of Services:

  • Environmental Compliance Plan
  • Preparation
  • Construction Monitoring
  • Documentation & Reporting
  • Regulatory Agency Coordination
  • Wetlands Delineation
  • Water Quality Monitoring
  • Stream Diversion Oversight
  • Training
  • Stream Mitigation Design
  • Permitting
  • Roadside Restoration Design
  • Erosion Control Monitoring
  • Environmental Reporting
  • Vegetation Monitoring