Record high water levels along the Nenana River caused a one-lane closure on the Parks Highway at mile 240.
The river rose to a crest of 14.7 feet in Healy on Friday and remained at about the same level until Saturday evening.
The Alaska Department of Transportation and Public Facilities began monitoring the river on Friday as it began to erode a portion of the highway, according to spokeswoman Meadow Bailey.
One lane was shut down on Saturday morning, causing some traffic delays in the area. Crews began roadwork on Saturday afternoon, and Bailey said repairs should be completed Monday.
A flood warning by the National Weather Service was cancelled upstream of the Rex Bridge on the Nenana River.
At noon on Sunday, the river in Healy was at 13.3 feet, which is below the flood stage.
The flood warning remains in effect downstream of the Rex Bridge until 10:15 p.m. Sunday.
Some roads near rivers in Nenana are reported as flooding, and the National Weather Service encourages people to move property and belongings away from the river bank.