Idaho Railway Post Offices - OSL / UP Branch Lines


Routes on the Ketchum Branch of the Oregon Short Line / Union Pacific Main Line:
RPODatesComments
KETCHUM & SHOSHONE1884-1893
KETCHUM & SHOSHONE1908-1942


Routes on the Boise Branch of the Oregon Short Line / Union Pacific Main Line:
RPODatesComments
BOISE & NAMPA1896-1908
BOISE & WEISER1908-1909
BOISE & HUNTINGTON1909-1916
BOISE & NAMPA1916-1917
POCATELLO & BOISE1911-1914supplemental route
supplemental route established and discontinued concurrent with BOISE & HUNTINGTON and POCATELLO & PORTLAND (see Main Line)
POCATELLO & BOISE portion east of MINIDOKA plus MINIDOKA & BUHL (see Buhl Branch) combined into POCATELLO & BUHL (see Buhl Branch)


Routes on the Buhl Branch of the Oregon Short Line / Union Pacific Main Line:
RPODatesComments
MINIDOKA & TWIN FALLS1905-1908
MINIDOKA & BUHL1908-1914
POCATELLO & BOISE portion east of MINIDOKA (see Boise Branch) plus MINIDOKA & BUHL combined into POCATELLO & BUHL
POCATELLO & BUHL1914-1930
MINIDOKA & BUHL1930-1955


Routes on the Shoshone Bypass from the Oregon Short Line / Union Pacific Main Line:
RPODatesComments
MINIDOKA & BLISS1913-1913
RUPERT & BLISS1913-1919
MINIDOKA & BLISS1919-1920
RUPERT & BLISS1920-1921


Route on the Hill City Branch of the Oregon Short Line / Union Pacific Main Line:
RPODatesComments
SHOSHONE & HILL CITY1913-1917
route established and discontinued concurrent with KETCHUM & SHOSHONE (see Ketchum Branch)


Route on the McCall Branch of the Oregon Short Line / Union Pacific Main Line:
RPODatesComments
MCCALL & NAMPA1914-1948


Route on the Rogerson Branch of the Oregon Short Line / Union Pacific Main Line:
RPODatesComments
TWIN FALLS & ROGERSON1915-1927
route established and discontinued concurrent with POCATELLO & BUHL (see Buhl Branch)


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Compiled by Mark Metkin - Revised November 12, 2007


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