I-5 - MTB Cantilever Signs and Landscaping - Complete February 2020

Project news

  • Project was awarded to Massana Construction Inc., on January 2, 2018

Needs & benefits

Why did WSDOT resurface the highway and repair the bridge?

This project series improved safety throughout a total of five miles along I-5, between Mellen Street (Exit 81) and just north of the Harrison Ave. interchange (Exit 82) in Lewis County. 

In spring 2018, contractor crews working for the Washington State Department of Transportation erected two "Exit Only" cantilever signs over the right lane on southbound I-5, for the off-ramp to Harrison Avenue/Exit 82, removed and replaced damaged guardrail, and added new landscaping at both the Harrison Avenue and Mellen Street interchanges. 

Interstate 5 or I-5, is the most significant freight freeway on the West Coast. The interstate links markets in Canada, the United States and Mexico, and is critical to the regional, state and national economy. This stretch of I-5 sees approximately 68,000 vehicles per day.


  • Winter 2017: Project went to competitive bid
  • Spring/summer 2018: Construction work began
  • Winter 2020: Construction work was completed


The total cost of the project was $1,764,787


Colin Newell
WSDOT Project Engineer
(360) 740-8600

Celeste Dimichina
WSDOT Communications
(360) 905-2057

Interstate 5 in Centralia between Mellen Street and Harrison Avenue