Alexandra Avenue Bridge (Multnomah County, Oregon)
Built 1922
Concrete arch bridge over a canyon on NW Alexandra Avenue in Portland
Open to traffic

BNSF Railroad Bridge (Multnomah County, Oregon)
Built 1909
Deck truss bridge over the BNSF Railroad on US 30 Bypass in Portland
Open to traffic

Broadway Street Bridge (Multnomah County, Oregon)
Built 1912; rehabilitated 1927
Bascule bridge over Willamette River on Broadway Street in Portland
Open to traffic

Burnside Bridge (Multnomah County, Oregon)
Built 1926
Bascule bridge over Willamette River on Burnside Bridge in Portland
Open to traffic

Columbia River Interstate Bridge (Multnomah County, Oregon)
Northbound bridge built 1917; southbound bridge built 1958
Pair of vertical lift bridges over the Columbia River on I-5 between Vancouver and Portland in Portland
Open to traffic

Fessenden Street Bridge (Multnomah County, Oregon)
Built 1909
Deck truss bridge over BNSF Railroad on Fessenden Street in Portland
Open to traffic

Fremont Bridge (Multnomah County, Oregon)
Built 1973
Steel through arch bridge over Willamette River on I-405 in Portland
Open to traffic

Grand Avenue Viaduct (Multnomah County, Oregon)
Built 1908; Modified in 1960 for the construction of I-84
Girder bridge over UPRR & I-84 on Grand Avenue in Portland
Open to traffic

Hawthorne Avenue Bridge (Multnomah County, Oregon)
Built 1910; rehabilitated 1944
Vertical lift bridge over Willamette River on Hawthorne Avenue in Portland
Open to traffic

Marquam Bridge (Multnomah County, Oregon)
Built 1966, Seismic Retrofit 1996
Deck truss bridge over Willamette River on I-5 in Portland
Open to traffic

Martin Luther King Jr. Blvd Viaduct (Multnomah County, Oregon)
Built 1937, Replaced 2008-2009
Stringer bridge over UPRR & Division Street on Oregon 99E in Portland
Open to traffic

Morrison Street Bridge (Multnomah County, Oregon)
Built 1958
Bascule bridge over Willamette River on Morrison Street in Portland
Open to traffic

Multnomah Channel Bridge (Multnomah County, Oregon)
Built 1948
Through truss bridge over Multnomah Channel on FAS A668 in Portland
Replaced by a new bridge in June 2008

Ross Island Bridge (Multnomah County, Oregon)
Built 1926
Steel arch bridge over Willamette River on US 26 in Portland
Open to traffic

Sellwood Bridge (Multnomah County, Oregon)
Built 1925
Deck truss bridge over Willamette River on Tacoma Street in Portland
Open to traffic

St. Johns Bridge (Multnomah County, Oregon)
Built 1931
Suspension bridge over Willamette River on US 30 Bypass in Portland
Open to traffic

Steel Bridge (Multnomah County, Oregon)
Built 1910
Through truss bridge over Willamette River on OR 99W in Portland
Open to traffic

Vista Avenue Viaduct (Multnomah County, Oregon)
Built in 1925 by Parker & Banfield
Concrete arch bridge over SW Jefferson on SW Vista Avenue in Portland
Open to traffic

Vista Ridge Tunnel (Multnomah County, Oregon)
Built 1969
Pair of tunnels under Vista Ridge on US 26 in Portland
Open to traffic

Willamette Blvd. Bridge (Multnomah County, Oregon)
Built 1909
Deck truss bridge over BNSF Railroad on Willamette Blvd. in Portland
Open to traffic