Construction between Vale and Brogan was aided by the Willow River Land and Irrigation Company.
On December 23, 1910, new UP subsidiary Oregon–Washington Railroad and Navigation Company (OWR&N) acquired the property of the Malheur Valley Railway, but the line continued to be operated under lease by the OSL.
The OWR&N subsequently built a line west from Vale, eventually reaching Burns, and also leased this Ontario–Burns Branch to the OSL.
[4]) The line eventually expanded north from Burns into what is now the Malheur National Forest, where it split up into several branches.
On November 1, 2020, the OERR was sold by The Western Group to Jaguar Transport Holdings of Joplin, Missouri.