Sound Transit’s Federal Way Link Extension: Rail Project Details
Sound Transit’s Federal Way Link light-rail extension opens Dec 6, adding 7.8 miles to the system.

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Introduction
Sound Transit will launch service on the Link 1 Line light-rail extension to Federal Way, Washington, on December 6. The project, which has been under construction since 2020, extends the light-rail system by 7.8 miles.
Project Overview
The Federal Way extension is currently undergoing pre-revenue testing. It adds 7.8 miles to the Link light-rail system. The route primarily utilizes elevated track between Angle Lake and downtown Federal Way, according to Sound Transit’s expansion webpage.
New Stations
The new route incorporates three new stations located at Kent Des Moines, Star Lake, and downtown Federal Way. The extension will connect Federal Way to the remainder of the Link system, including stops at the Seattle-Tacoma International Airport and Seattle.
Project Timeline
Planning and construction of the Federal Way Link extension project have spanned over eight years. Construction commenced in 2020.
Financial Details
The estimated cost of the extension is $2.5 billion, which includes a $629 million federal loan and $948 million in grants, as reported by The Seattle Times.
Conclusion
The Link 1 Line light-rail extension to Federal Way, Washington, will commence service on December 6. The 7.8-mile extension, which began construction in 2020, includes three new stations and has a total cost of $2.5 billion.
Company Summary
Sound Transit: A Seattle-area transit agency.
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