166th Avenue E/SR 410 Interchange
The Challenge
The State Route 410/166th Avenue interchange is a congested mess. Originally built in the early 1970s, this interchange serves regional commuters cutting through Sumner to avoid the SR 167 congestion and thousands of vehicles trying to access busy commercial areas. Beyond the usual congestion found at so many regional interchanges/routes, the issue here is a completely unsafe intersection control situation for drivers, as well as a complete lack of pedestrian facilities and a small, buried culvert that prevents fish from continuing to access habitat in Salmon Creek.
Solutions
- Widen the remaining two-lane stretch of 166th Avenue to eliminate the bottleneck just north of the existing SR410 interchange.
- Design and construct two roundabouts at SR410 Westbound on/off ramp and at 64th Street to reduce congestion and improve safety.
- Replace an existing undersized culvert with a new fish-passage culvert to carry Salmon Creek across the existing intersection at 166th Avenue and 64th Street. Daylight a portion of stream channel to improve salmon habitat.
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166th Avenue Project included of the 2021 Sumner Washington State Legislative Agenda
The 166th Ave E/ SR410 Interchange project is part of Sumner's 2021 Legislative Agenda. This document is produced for lawmakers looking to local municipal governments to understand their needs and priorities. Funding complete Final Design and Right-of-Way acquisitions would greatly benefit residents of Sumner and other users within the region. Check out the entire Sumner legislative agenda here:
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166th Project Awarded Port of Tacoma Grant
In 2020, Sumner was awarded a $25,000 grant through the Port of Tacoma Local Economic Development Fund to support the project design phase. These funds will be spent directly on transportation-related design expenses to help the City advance the project through the preliminary design process. A big "Thank You" to the Port in supporting this important regional project!
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Design Features Double Roundabout
Some people love them; others hate them.No matter your feelings regarding roundabouts, engineers studied our challenging intersections at 166th Avenue and SR 410 and found that a double roundabout is the best solution.
The issue here is that the SR 410 ramps are too close to the 166th Avenue/64th Street intersection for a traditional signal in both locations, yet both need a controlled intersection. The solution is a double roundabout that gets drivers to SR 410, 166th Avenue, Sumner-Tapps Highway and 64th Street in the most efficient and safest way possible.
This is Sumner’s first roundabout, let alone its first double roundabout. We have funding for design
only, not construction, so you won’t see this being built yet. -
The News Tribune features 166th
May 30, 2019 - The News Tribune featured an article about the 166th interchange. Click here to read online. (External link)
Who's listening
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Phone 253-299-5709 Email michaelk@sumnerwa.gov (External link) -
CL
Phone (253) 299-5710 Email courtneyl@sumnerwa.gov (External link)