TALLAHASSEE, Fla. — Officials are watching a bridge in north Florida for signs of flooding that might shut down Interstate 75, according to the Florida Department of Transportation.

The FDOT is watching a small bridge at I-75 over the Santa Fe River County, according to an FDOT statement.

“The river is expected to crest at historic and unprecedented levels presenting a potential threat to the safety of travel on this bridge,” the statement says.

The Santa Fe River under I-75 rose 15 feet within 36 hours due to the heavy rainfall from Hurricane Irma, and an additional rise is expected as water levels from upstream move southward down the river, according to the transportation department.

However, if the river were to rise to an unsafe level, the bridge would become impassable both northbound and southbound, and would be closed immediately, FDOT said.