The final piece of the Federal Way triangle project will be open to drivers by noon today, according to the state Department of Transportation.
A ramp now connects state Route 18 to state Route 161, which will lessen congestion for those trying to get from the Kent valley to Federal Way’s business district.
The ramp drops drivers south of two busy intersections on South 348th Street, including state Route 161 and Pacific Highway South.
It took crews two years to complete the $112 million project. The first set of new ramps opened in July.
WSDOT said it is still wrapping up environmental projects related to the construction work.
Crews built a 400-foot backwater channel for coho and cutthroat salmon just west of Todd Beamer High School. They also created a three-acre wetland mitigation site, four stormwater ponds to clean runoff water from the highways and redesigned a 500-foot tributary west of I-5 near jet Chevrolet.
There are plans to plant more than 50,000 trees and shrubs to better manage water runoff, weeds and winter weather.