Ivan D. Merchant
Astoria-Megler Bridge (Clatsop County, Oregon)Oregon Bridge Engineer, 1966
Through truss bridge over Columbia River on US 101 in Astoria
Open to traffic
North Umpqua River I-5 Bridge (Douglas County, Oregon)1964 - Bridge Engineer, 1955
Pair of deck truss bridges over North Umpqua River on I-5 in Roseburg North
Open to traffic
South Umpqua River I-5 Bridge (Douglas County, Oregon)Bridge Engineer, 1955
Pair of deck truss bridges over South Umpqua River I-5 in Green
Replaced by a concrete box girder bridge in 2009
Thomas Creek Bridge (Curry County, Oregon)Bridge Engineer, 1961
Deck truss bridge over Thomas Creek on US 101
Open to traffic
Yaquina Bay Bridge (Lincoln County, Oregon)Built 1934
Steel through arch bridge over Yaquina Bay on US 101 in Newport
Open to traffic