description Cascade Tunnel Overview
The Cascade Tunnel refers to the 7.79-mile (12.5-kilometer) railroad tunnel through the Cascade Range in Washington state, completed by the Great Northern Railway in 1929 to replace an earlier, shorter tunnel opened in 1900. The Great Northern operated the tunnel with electric locomotives until 1956, when diesel operations began with a forced-ventilation system to manage exhaust. It was the longest railroad tunnel in North America at opening and remains so. The tunnel is operated by BNSF Railway and carries freight traffic under Stevens Pass.
help Cascade Tunnel FAQ
Where is the Cascade Tunnel located?
The Cascade Tunnel is a 7.79-mile (12.5-kilometer) railroad tunnel located in the Cascade Range in Washington state. It was built to provide a reliable route for the Great Northern Railway through the mountains.
What year was the Cascade Tunnel completed?
The current Cascade Tunnel was completed by the Great Northern Railway in 1929. It was constructed to replace an earlier, shorter tunnel that had opened in 1900.
How were trains powered through the Cascade Tunnel?
Due to the length of the tunnel and ventilation issues, the Great Northern Railway operated it using electric locomotives. Using electric power prevented the buildup of dangerous exhaust fumes inside the enclosed space.
Why was the original Cascade Tunnel replaced?
The original 1900 Cascade Tunnel suffered from severe ventilation problems and operational difficulties caused by snow and smoke. To solve this, the Great Northern Railway completed a longer, safer tunnel in 1929.
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