UPDATE: OCT. 12 AT 10:08 P.M.
MDT reports, I-90 has been reopened at mile marker 554.4
UPDATE: OCT. 12 AT 6:42 P.M.
Around 6:20 p.m. Tuesday, I-90 from mile marker 518 to 544 reopened, but now MDT reports I-90 is closed at mile marker 554.4.
The Montana Department of Transportation reports a section of I-90 is closed from mile marker 518 to 544.