An historic steel bridge near Glacier will be reduced to one lane starting on Monday as state officials take a closer look at some corrosion.

Traffic will be reduced to one lane beginning at 9 a.m. and will be in place 24-hours a day, seven days a week until further notice, according to a news release from the Washington State Department of Transportation. Traffic will be controlled by portable signals on each side of the Warnick Bridge, which is near milepost 31 on Mount Baker Highway and goes over the north fork of the Nooksack River.

The corrosion on the bridge was discovered during a routine inspection and the traffic reduction is a precautionary measure to reduce stress on the bridge. WSDOT officials will perform additional tests this week to determine the extent of the damage, WSDOT said.