An Alaska Railroad spokeswoman says washouts of track and lost revenue likely will cost the line more than $1 million.
But Stephenie Wheeler says the state-owned railroad is progressing faster than projected repairing damaged track from a major washout north of Talkeetna.
About 500 feet of mainline track were left dangling Saturday near Gold Creek.
Wheeler says crews have been working round the clock to make repairs and the main line could open as early as Tuesday, a day earlier than projected.
The area is in a 70-mile stretch of rail corridor between Willow and Gold Creek where high water from heavy rain has affected track and several bridges.
Trains between Anchorage and Fairbanks have not operated since Wednesday.