This stretch of SR 9 in the city of Lake Stevens is in the heart of a rapidly expanding community. In 2020, about 19,050 vehicles travel through the SR 9/South Lake Stevens Road intersection per day, with seven percent coming from the west on South Lake Stevens Road. These numbers are expected to rise with planned development to the west of the intersection.
This project will construct a roundabout designed to handle high volumes of traffic and improve safety. Currently, stopped vehicles turning onto SR 9 from South Lake Stevens Road must merge with through traffic traveling 55 mph. The roundabout is expected to reduce collisions at the intersection by at least 50 percent.
In addition to the roundabout, crews will make several improvements to the area including tree planting, re-constructing the Centennial Creek channel to make it useable for salmon, and stormwater treatment with the creation of a new detention pond.
We will also replace the existing fish passage culvert under South Lake Stevens Road with a 19-foot-wide passageway and include stream habitat elements to help promote successful fish and stream function.
The total cost of this project is $8.8 million.
The SR 9/South Lake Stevens Road intersection improvement project will have several detours setup both for local and through traffic.
When there is a full closure of SR 9 and parts of South Lake Stevens Road, through traffic will be detoured to US-2 and SR 204 as seen in the map above.
Travelers will not be able to access SR 9 from the westside leg of South Lake Stevens Road for the remainder of this project.
Local traffic will be able to continue on SR 9 up to the closure points of 32nd Street Southeast (northbound) and 20th Street Southeast (southbound). From there, traffic will be detoured towards either the east or west side of South Lake Stevens Road. Signed detours will be posted.
The project is expected to be complete by this fall. Above is a rendering of how the final configuration will look once work is complete.
