Project Info

I-5 - Grand Mound to Maytown Stage Two - Replace Interchange - Complete October 2014

The project re-built the I-5/US 12 interchange at Grand Mound to improve mobility and safety. The modified interchange configuration of US 12 over Interstate 5  eliminated the loop ramps. Traffic signals were installed at both ramp intersections resulting in a typical "diamond" interchange configuration. On the east side of the interchange, the two existing exits from northbound I-5 are consolidated to one exit point.

How you benefit

Improves safety
The project realigned and lengthened on- and and off-ramps at the interchange to provide the more room for vehicles to safely enter and exit the highway. The project also added signals and improved driver sight distance.


Contact us
Steve Fuchs
WSDOT Tumwater Project Office
Phone: 360-570-6750