How about OPB Radio?
KOPB-FM 91.5 Portland
KOAC-FM 89.7 Astoria
KEPB (AM) 1600 Eugene
KOAC (AM) 550 Corvallis
KRBM FM 90.9 Pendleton
KETP (FM)88.7 Enterprise
KOGL-FM 89.3 Gleneden Beach
KOJD (FM) 89.7 John Day
KHRV (FM) 90.1 Hood River
KOAB-FM 91.3 Bend
KOAP (FM) 88.7 Lakeview
KOBK (FM) 88.9 Baker City
KOBN (FM) 90.1 Burns
KOTD (FM) 89.7 The Dalles
KTMK (FM) 91.1 Tillamook
KTVR-FM 88.9 La Grande
CP: KOHP 90.7 FM Hines
Translators
Corvallis 103.1 FM
Halfway 91.3 FM
Happy Hollow 93.5 FM
Nedonna Beach 106.5 FM
Ontario 107.5 FM
Richland 91.9 FM
Silver Lake (Lake County) 91.7 FM
Valley Falls (Lake County) 91.1 FM
Wagontire (Harney County) 90.3 FM