Project Title & Location
I-5/Grand Mound to Maytown Stage One -Add Lanes (Thurston County)

Project Description
This project widens I-5 from Grand Mound (US 12 West I/C) to Maytown by adding one lane in each direction. The work includes flattening an existing freeway curve, improving the Grand Mound and Maytown interchange ramps, and improving Rest Area ramps. There are currently four lanes. There will be six lanes when this project is completed.

Contractor/Consultant
Project not yet advertised or awarded.

Recent Progress
The project office is currently developing contract plans. A 60% design constructability review has been conducted. Environmental documentation and permit applications are essentially complete. Right of way acquisition is ongoing for one parcel.

The Legislature has funded Stage 2; the improvements to the Grand Mound Interchange.

Design Construction Impacts
To facilitate construction staging, a temporary bridge will be constructed adjacent to Southbound I-5, over Prairie Creek. This will be done to minimize impact to the traveling public and mitigate construction challenges.

Environmental Impacts / Compliance

This project will have minor wetland impacts.  The project will use wetland bank credits that have been established in the cooridor to mitigate for project impacts.

The design team is developing plans to replace one fish barrier culvert with one that will allow fish passage to upstream habitat.

Impacts to Traffic
During construction, nighttime lane closures and daytime width reductions will be necessary.  Bridge replacement will require long term narrowing of lanes and traffic shifts.

Planned vs. Actual Expenditures
(Total Project Cost)

Nickel funds included in above costs

2005 Transportation Partnership Account