Provincial Police say the Nipigon River Bridge is now open to one lane of traffic.
Police say traffic control is in place and you can expect delays.
West and eastbound traffic is being alternated.
The new bridge was closed to all traffic, east and west, after it heaved in the cold Sunday when a bolt had broken.
Ministry of Transportation staff worked through the night to rectify the situation, using counterweights to level the bridge surface.
An engineering inspection was also completed to ensure the safety of the bridge and the travelling public.
Meantime, Transportation Minister Steven Del Duca is hoping to inspect the site later this week.
MTO staff are trying to determine when oversized trucks can use the bridge.
Minister of Northern Development and Mines Michael Gravelle is visiting the bridge Monday.
