sentences:  Route 12 follows the Lochsa River along its north bank.One of the last two-lane U.S. highways constructed, it was completed in the early 1960s, connecting Lewiston with Missoula over Lolo Pass.Two railroads, the Northern Pacific and Union Pacific, had originally planned to ascend the Lochsa; the Northern won the rights and even completed some grades in 1908, but abandoned the project in 1909.