Oregon Short Line Railroad
Reporting mark: OSL
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Ashton-Tetonia Trail - Conant Creek Trestle (Fremont County, Idaho)
Built 1894 at American Falls; dismantled 1911; relocated here 1914Three-span Pegram deck truss bridge over Conant CreekOpen to pedestrians only as part of Ashton-Tetonia Trail
EIRR - Lorenzo Bridge (Madison County, Idaho)
Warren through truss with all verticals bridge over Snake River on Eastern Idaho Railroad (EIRR)Open to traffic
EIRR - Ririe Bridge (B) (Jefferson County, Idaho)
Built 1894 as five-span bridge at Nyssa, Oregon; one span relocated here 1914Pegram through truss bridge over Snake River Flood Channel on the Eastern Idaho Railroad - East Belt BranchOpen to Traffic
EIRR - St. Anthony Pegram Truss Bridge (Fremont County, Idaho)
Built 1896; relocated here 1914Two-span Pegram through truss bridge over Henry's Fork Snake River on the Eastern Idaho Railroad (EIRR)Open to traffic
OSL - American Falls Pegram Deck Truss (Power County, Idaho)
Built 1883; Pegram trusses added 1894; Whipple deck truss replaced in 1902; Replaced 1911Lost Pegram deck truss bridge over American Falls on Oregon Short Line RailroadReplaced by a new bridge
OSL - Bear River Bridge (Bear Lake County, Idaho)
Lost Pegram through truss bridge over Bear River on Oregon Short Line RailroadReplaced by a new bridge
OSL - Caldwell Pegram Truss (Canyon County, Idaho)
Replaced 1911Lost Pegram through truss bridge over Boise River on Oregon Short LineReplaced by a new bridge
OSL - Nyssa Pegram Truss (Malheur County, Oregon)
Built 1894; Replaced 1914Lost Pegram through truss bridge over Snake River on Oregon Short Line RailroadReplaced by a new bridge
OSL - Ontario Pegram Truss (Malheur County, Oregon)
Built 1894; Replaced 1914, some trusses relocatedLost Pegram through truss bridge over Snake River on Oregon Short Line RailroadReplaced by a new bridge
OSL - Payette Pegram Bridge (Payette County, Idaho)
Built 1894-6; Replaced 1913-4Lost Pegram through truss bridge over Payette River on Oregon Short Line RailroadReplaced by a new bridge
OSL - Weiser Pegram Bridge (Washington County, Idaho)
Built 1894-6; Replaced 1913-4Lost Pegram through truss bridge over Weiser River on Oregon Short Line RailroadReplaced by a new bridge
UP - Bridge Island Bridge (N) (Malheur County, Oregon)
Built 1914Warren through truss bridge over Snake River on Union Pacific RailroadOpen to traffic
UP - Bridge Island Bridge (S) (Canyon County, Idaho)
Warren through truss bridge over Snake River Channel on Union Pacific RailroadOpen to traffic
UP - Crane Creek Bridge (Harney County, Oregon)
Abandoned bridge over Crane Creek on Union Pacific RailroadDerelict/abandoned
UP - Grace Pegram Truss Bridge (Caribou County, Idaho)
Built 1894 at Georgetown, Idaho; relocated here ca. 1913Pegram through truss bridge over Bear River on Union Pacific RailroadDerelict/abandoned
UP - Gwynn Bridge (Malheur County, Oregon)
Built 1913; Removed sometime after 1999Lost Pony plate girder bridge over Malheur River on Union Pacific RailroadNo longer exists
UP - Horsehsoe Bend Bridge (E) (Malheur County, Oregon)
Abandoned pony/through plate girder bridge over Malheur River on Union Pacific RailroadAbandoned
UP - Horseshoe Bend Bridge (W) (Malheur County, Oregon)
Lost Pony/through plate girder bridge over Malheur River on Union Pacific RailroadDestroyed by flooding(?)
UP - Jonesboro Bridge (Malheur County, Oregon)
Built 1913; Removed sometime after 1999Lost Pony/through plate girder bridge over Highway 7 on Union Pacific RailroadRemoved
UP - Malheur River Bridge #2 (Malheur County, Oregon)
Abandoned deck plate girder bridge over Malheur River on Union Pacific RailroadAbandoned
UP - Malheur River Bridge #3 (Malheur County, Oregon)
Abandoned pony/through plate girder bridge over Malheur River on Union Pacific RailroadAbandoned and missing a span, likely due to flooding.
UP - Malheur River Bridge #4 (Malheur County, Oregon)
Built 1912; Abandoned 1990Abandoned deck plate girder bridge over Malheur River on Union Pacific RailroadAbandoned
UP - Malheur River Bridge #5 (Malheur County, Oregon)
Built 1912, Closed due to flooding 1984, Abandoned 1990Abandoned pony/through plate girder bridge over Malheur River on Abandoned Oregon Eastern RailroadAbandoned
UP - North Fork Malheur River Bridge (Malheur County, Oregon)
Built 1913, Closed to to flooding 1984, Abandoned 1990Abandoned pony/through plate girder bridge over North Fork Malheur River on Abandoned Oregon Eastern RailroadAbandoned
UP - Ontario Subway (Malheur County, Oregon)
Built 1939Steel stringer bridge over BUS US30 on Union Pacific RailroadOpen to traffic
UP - Snake River Bridge (Malheur County, Oregon)
Built 1914Warren through truss with all verticals bridge over Snake River on Union Pacific RailroadOpen to traffic
UP - Tunnel (Malheur County, Oregon)
Abandoned tunnel on Union Pacific RailroadAbandoned
Wood River Trail - Cold Springs Pegram Bridge (Blaine County, Idaho)
Built 1894 as part of a five-span bridge at Ontario, Oregon; one span relocated here 1917; rail line discontinued 1981; converted to pedestrian use 1984Pegram through truss bridge over Big Wood River on a pedestrian trailOpen to pedestrians
Wood River Trail - Gimlet Pegram Truss Bridge (Blaine County, Idaho)
Built 1894 as part of a five-span bridge at Ontario, Oregon; One span relocated here 1914; Rail line discontinued 1981; Converted to pedestrian use 1984Pegram through truss bridge over Big Wood River on Union Pacific RailroadOpen to pedestrians; This one is reccomended for hikers/equestrians.
WYCO - Malheur River Bridge (Malheur County, Oregon)
Built 1906Pratt through truss bridge over Malheur River on Wyoming & Colorado RailroadOpen to traffic