Googlefanning! Google views appear to show things operating as of about 2018. Here's the satellite view just outside of the mill with a critter and a few cars visible; scroll around and check the street views near the grade crossings: [
goo.gl]
Other references from a cursory web search:
Wikipedia: [
en.wikipedia.org]
Trainweb - Western Rails: [
www.trainweb.org]
Trainweb - Roster: [
www.trainweb.org]
UP Shortline Listing: [
www.up.com]
Wikipedia - Interfor Corp.: [
en.wikipedia.org]
Corporate website (no mention of the railroad): [
www.interfor.com]
KN pictures: [
railpictures.net]
Oregon DOT railroad map (KNOR is in the south, near Chemult): [
www.oregon.gov]
Jack Bowden Logging RR Collection 1910-2005 at OR Inst. of Tech., Klamath Falls (reference materials); search page for Klamath Northern to locate materials in the archive: [
archiveswest.orbiscascade.org]