Curving past Toston Dam All three Montana Rail Link F45s power train LM (Laurel to Missoula manifest freight) by Toston Dam on the Missouri River as the train curves through Lombard Canyon in Montana on October 17, 2000. Electro-Motive Division F45s Nos. 390, 391, and 392 power the freight. At this time, a fourth F45 was in the Midwest assigned to IMRL, and would later return to Big Sky Country.