B.C. Highway Flood Recovery Projects - Highway 1 - Malahat Tunnel Hill Washout

Highway 1 - Malahat Tunnel Hill Washout project was completed in October 2023.

The atmospheric river flood event on November 15, 2021 washed out approximately 50m of the NB lane, the existing culvert outlet was damaged, and several sections of the existing retaining wall (bin wall) were compromised. Temporary repairs were completed to stabilize the slope and reopen the highway.

The Malahat is a critical connection for residents, businesses, emergency services and the transportation of goods between the mid-Island and the Capital Region. This project ensures safety for drivers and increases resiliency during future extreme climate events.

The project included:

• Restoring approximately 50 metres of the northbound lane north of Finlayson Arm Road and repairing damage to existing drainage and slope stability
• Replacing 80-metre long retaining wall to secure the slope against future extreme weather events
• Addressing drainage capacity to protect against extreme weather events

Location

• Highway 1 Malahat Tunnel Hill is located approximately 1 km north of Finlayson Arm Road, within the northern boundary of Goldstream Provincial Park, on Vancouver Island.

Project cost

• The project budget is $24 million
• The construction contract is $14.893 million

Status

Check DriveBC for conditions and events that may be affecting Highway 1

The contract was awarded to Windley Contracting Ltd. 

The status of permanent repairs:

• Mobilization (COMPLETED)
• Temporary Retaining Wall (COMPLETED)
• Permanent Anchors – 98 DCP Anchors (COMPLETED)
• Piling – 84 Piles total (COMPLETED)
• Reinforcing Steel and Concrete Retaining Wall (COMPLETED)
• Drainage (COMPLETED)
• Grading & Paving (COMPLETED)
• Demobilization (COMPLETED)

Construction of permanent repairs began in July 2022 and and completed in October 2023.

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Videos

• Videos on Flickr