A new culvert will need to be installed on the Highway 99 northbound approach to the Oak Street Bridge, with work to begin immediately.
How long that will take remains unclear, but is a priority, according to an e-mail from the Ministry of Transportation.
Meanwhile two-lane traffic northbound will be open to drivers thanks in part to the wide median, which will allow traffic to flow by during the closure of the failed section of roadway.
The roadway buckled and collapsed Tuesday morning when the culvert that runs underneath the highway from east to west collapsed.
“The cause of the culvert failure is still under investigation,” the ministry said. But a preliminary assessment has determined that a new culvert will need to be installed.
“The time to completion is still unknowns, but we will minimize impacts on traffic flow.
Two lanes of northbound traffic will remain open, but there could be overnight closures of one of the lanes to enable work crews to undertake repairs.
Jacks were installed beneath Highway 99 to enable it to remain open.
The culvert connects a waterway that runs from one side of the highway to the other.