Lynnwood Link Extension: Advancements in Seattle Light Rail

Here’s an excerpt tailored for railway professionals:

“Sound Transit’s **Lynnwood Link Extension** hit a major milestone with the TBM ‘Brenda’ completing its tunnel excavation. This 8.5-mile project is on track for 2024.”

Lynnwood Link Extension: Advancements in Seattle Light Rail
May 15, 2017 7:15 pm
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Introduction

Sound Transit is advancing on the Lynnwood Link Extension, with the latest milestone being the completion of the tunnel boring machine (TBM) mining operation. The TBM, named “Brenda,” completed its 1.6-mile journey, breaking through at the Northgate Station in Seattle on July 10, 2018. The project is part of the larger regional transit expansion.

Tunneling Operations

The TBM “Brenda” began its excavation on July 25, 2016, at the University of Washington Station. Over the course of 23 months, the machine mined approximately 26,000 linear feet, or 5 miles, of twin tunnels. The diameter of each tunnel is 21 feet. The machine advanced through varied soil conditions, including glacial till, advance sands, and some areas with groundwater. Approximately 520,000 cubic yards of excavated material were removed during the tunneling process.

Project Details

The Lynnwood Link Extension project encompasses 8.5 miles of light rail, extending from the University of Washington Station to the Lynnwood City Center Station. It includes the construction of four new stations: University District, Roosevelt, and Northgate in Seattle, and Lynnwood City Center in Lynnwood. The project’s budget is estimated at $2.9 billion. The extension is scheduled to open in 2024.

Station Construction and Systems Installation

Following the completion of tunneling, the focus shifts to station construction and systems installation. This includes track installation, power and communications systems, and the integration of the new stations with the existing light rail network. The stations will feature public art, passenger amenities, and connections to bus and other transportation services.

Lynnwood Link Extension is an important project that is going to improve the transportation system in the Seattle metropolitan area.

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Last September 2018, we published an article about Innovative trenching on the Frankston line. Click here to read – Frankston Line Upgrade: Rail Trenching Innovation

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Conclusion

The Lynnwood Link Extension project reached a significant milestone with the completion of tunneling by the TBM “Brenda.” The project, extending light rail service by 8.5 miles and including four new stations, is on track for completion in 2024 with a budget of $2.9 billion.

Sound Transit

Sound Transit is a public transportation agency serving the Puget Sound region in Washington State, United States. It operates light rail, commuter rail, and bus rapid transit services. Sound Transit is responsible for the planning, construction, and operation of these transit systems.

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