Idaho Railway Post Offices - Utah Northern / OSL / UP Branch Lines


Routes on the Preston Branch of the Utah Northern / Oregon Short Line / Union Pacific Main Line:
RPODatesComments
PRESTON & OGDEN1891-1893
route established when BUTTE CITY & OGDEN changed from via PRESTON and FRANKLIN to via WESTON (see Main Line)
PRESTON & CACHE JUNCTION1893-1893
PRESTON & OGDEN1893-1897
PRESTON & OGDEN plus OGDEN & SALT LAKE CITY combined into PRESTON & SALT LAKE CITY
PRESTON & SALT LAKE CITY1897-1897
route discontinued when BUTTE & OGDEN extended into BUTTE & SALT LAKE CITY (see Main Line)
PRESTON & SALT LAKE CITY1907-1918
route reestablished concurrent with BUTTE & SALT LAKE CITY (see Main Line) and MALAD CITY & SALT LAKE CITY (see Malad City Branch)
PRESTON & CACHE JUNCTION1918-1943
route discontinued at same time as MALAD CITY & BRIGHAM (see Malad City Branch)


Routes on the Victor Branch of the Utah Northern / Oregon Short Line / Union Pacific Main Line:
RPODatesComments
SAINT ANTHONY & IDAHO FALLS1900-1903
SAINT ANTHONY & SALT LAKE CITY1903-1906
ASHTON & IDAHO FALLS1906-1907
MARYSVILLE & IDAHO FALLS1907-1909
MARYSVILLE & POCATELLO1909-1912
ASHTON & POCATELLO1912-1914
ASHTON & SALT LAKE CITY1914-1916
VICTOR & SALT LAKE CITY1916-1917
VICTOR & OGDEN1917-1919
VICTOR & IDAHO FALLS1919-1941
VICTOR & POCATELLO1941-1946
VICTOR & IDAHO FALLS1946-1956
ASHTON & VICTOR1914-1915supplemental route
supplemental route established concurrent with ASHTON & POCATELLO and discontinued concurrent with ASHTON & SALT LAKE CITY


Routes on the Mackay Branch of the Utah Northern / Oregon Short Line / Union Pacific Main Line:
RPODatesComments
BLACKFOOT & MACKAY1902-1904
POCATELLO & MACKAY1904-1904
BLACKFOOT & MACKAY1904-1937
SALMON & BLACKFOOT1937-1940train and bus route
star route from SALMON to MACKAY
BLACKFOOT & MACKAY1940-1942


Routes on the Malad City Branch of the Utah Northern / Oregon Short Line / Union Pacific Main Line:
RPODatesComments
MALAD CITY & SALT LAKE CITY1906-1914
route established concurrent with BUTTE & SALT LAKE CITY (see Main Line) and SAINT ANTHONY & SALT LAKE CITY (see Victor Branch)
MALAD CITY & BRIGHAM1914-1921
MALAD CITY & SALT LAKE CITY1921-1932
MALAD CITY & BRIGHAM1932-1943
route discontinued at same time as PRESTON & CACHE JUNCTION (see Preston Branch)


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Compiled by Mark Metkin - Revised November 12, 2007


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