PRAIRIE DU CHIEN, Wis. -

Drivers who rely on the bridge connecting Prairie du Chien and Marquette, Iowa could be in for a huge headache.

The bridge over the Mississippi River was closed Sunday due to a possible structural issue on the east span of the bridge.

 It's unknown at this time how long the bridge will be out of service.

In the meantime, drivers needing to cross over the river are either going to have use the bridge in Dubuque or Lansing, Iowa.