One Toothrock Tunnel lane on I-84 closing nights

One lane will remain open at all time during the night closures but wide loads will need an alternate route

April 29, 2021

One eastbound lane of Interstate 84 west of Cascade Locks will close over four nights — from Monday night May 3 until Friday morning May 7 — while crews replace the old high pressure sodium lights in the Toothrock Tunnel with new LEDs.

The lane will close each night starting at 9 p.m. and re-open by 6 a.m. the next morning. The closure will alternate between the right and left lane with one lane always open.

Traffic using the open lane will be restricted to a maximum width of 8 feet six inches. During the lane closures, wider vehicles must find an alternate route.

The LEDs will improve safety in the tunnel with better lighting while also saving about 50% of energy costs compared to the old lights.

This work is part of a project to replace more than 8,000 roadway lights around the Portland area with LED lights, an important element in ODOT’s goal to provide a modern and safe transportation system, as spelled out in our Strategic Action Plan.

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About theToothrock Tunnel

The Toothrock Tunnel opened in 1936 as part of the Columbia River Highway, today known as the Historic Columbia River Highway. The 837-foot long tunnel features stone portals and carried two-way traffic at a point 41 miles east of Portland until 1969. Since 1969 the tunnel has only carried I-84 eastbound traffic.


Toothrock Tunnel around 1937