A-frame portal (232)
Beam (6,052)
Built 1968 (86)
Built during 1960s (1,217)
Burlington Northern Railroad (15)
Burlington Northern Santa Fe Railway (465)
Chicago, Burlington & Quincy Railroad (130)
Des Moines River (159)
Iowa (3,507)
Norfolk Southern Railway (453)
Open (28,315)
Owned by railroad (4,048)
| Polk County, Iowa (114)
Railroad (4,075)
Riveted (1,011)
Span length 175-250 feet (1,484)
Steel stringer (2,328)
Swan, Iowa (2)
Through truss (9,210)
Total length 1000-2500 feet (1,217)
Truss (23,574)
Warren through truss (928)
Warren truss (3,961)
|