This through plate girder bridge carries a former Illinois Central Railroad mainline over the Boyer River in Logan

Logan, Harrison County, Iowa

Owner: Canadian National Railway

Status: In Use

Built 1900 and reconstructed 1957 using a span fabricated 1928

by

American Bridge Works of Chicago, Illinois; American Bridge Company of New York; J.S. Patterson Construction Company of Chicago, Illinois and Unknown

for

Illinois Central Railroad

Design:
1-91', 1-87' and 1-45' through plate girders

Description:
Through plate girder bridge over Boyer River

Significance:

This quadrangular lattice through truss bridge carries a former Chicago & North Western Railway mainline over the Boyer River between Missouri Valley and Loveland

Missouri Valley, Harrison County, Iowa

Owner: Union Pacific Railroad

Status: In Use

Built 1920 using a span fabricated 1900

by

Lassig Bridge & Iron Works of Chicago, Illinois and Widell Company of Mankato, Minnesota

for

Chicago & North Western Railway

Design:
160' quadrangular lattice through truss and concrete modular girder

Description:
Quadrangular lattice through truss bridge over Boyer River

Significance:

This quadrangular lattice through truss bridge carries a former Chicago & North Western Railway mainline over the Little Sioux River near Little Sioux

Little Sioux, Harrison County, Iowa

Owner: Union Pacific Railroad

Status: In Use

Built 1902 and 1904

by

Unknown; American Bridge Company of New York and Widell Company of Mankato, Minnesota

for

Chicago & North Western Railway

Design:
160' quadrangular lattice through truss, 80' through plate girder and 1-40' and 1-30' deck plate girders

Description:
Quadrangular lattice through truss bridge over Little Sioux River

Significance:

This through and deck plate girder bridge carries a former Illinois Central Railroad mainline over a Union Pacific Railroad (former Chicago & North Western Railway) mainline and Perry Trail between Logan and Woodbine

Logan, Harrison County, Iowa

Owner: Canadian National Railway

Status: In Use

Built 1948 and 1979

by

American Bridge Company of New York; J.S. Patterson Construction Company of Chicago, Illinois and Unknown

for

Illinois Central Railroad

Design:
130' through plate girder and 1-62' and 1-45' deck plate girders

Description:
Through and deck plate girder bridge over Union Pacific Railroad (former Chicago & North Western Railway) and Perry Trail

Significance:

This concrete slab bridge carries a former Chicago & North Western Railway mainline over a unnamed ditch alongside US Highway 30 in Dunlap

Dunlap, Harrison County, Iowa

Owner: Union Pacific Railroad

Status: In Use

Built 1912

by

Koss Construction Company of Des Moines, Iowa

for

Chicago & North Western Railway

Design:
5-14' concrete slabs

Description:
Concrete slab bridge over unnamed ditch

Significance:

This through plate girder bridge carries a former Chicago & North Western Railway mainline over Mud Creek alongside US Highway 30 northeast of Woodbine

Woodbine, Harrison County, Iowa

Owner: Union Pacific Railroad

Status: In Use

Built 1916 and 1997

by

Chicago Bridge & Iron Works of Chicago, Illinois; Bates & Rogers Construction Company of Chicago, Illinois and Paxton-Vierling Steel Company of Omaha, Nebraska

for

Chicago & North Western Railway

Design:
83' through plate girder

Description:
Through plate girder bridge over Mud Creek

Significance:

This through plate girder bridge carries a former Illinois Central Railroad mainline over Mill Creek alongside US Highway 30 between Dunlap and Woodbine

Dunlap, Harrison County, Iowa

Owner: Canadian National Railway

Status: In Use

Built 1915 using a span fabricated 1901

by

Unknown

for

Illinois Central Railroad

Design:
60' through plate girder and 2-14' concrete slabs

Description:
Through plate girder bridge over Mill Creek

Significance:

This through plate girder bridge carries a former Chicago & North Western Railway mainline over Mill Creek alongside US Highway 30 between Dunlap and Woodbine

Dunlap, Harrison County, Iowa

Owner: Union Pacific Railroad

Status: In Use

Built 1914

by

Unknown

for

Chicago & North Western Railway

Design:
60' through plate girder

Description:
Through plate girder bridge over Mill Creek

Significance:

This deck plate girder bridge carries a former Illinois Central Railroad mainline over Parker Trail northeast of Logan

Logan, Harrison County, Iowa

Owner: Canadian National Railway

Status: In Use

Built 1915 using a span fabricated 1903

by

American Bridge Company of New York

for

Illinois Central Railroad

Design:
30' deck plate girder and timber pile trestle

Description:
Deck plate girder bridge over Parker Trail

Significance:

This large Warren through truss bridge carries a former Chicago & North Western Railway mainline over the Boyer River alongside US Highway 30 between Dunlap and Woodbine

Dunlap, Harrison County, Iowa

Owner: Union Pacific Railroad

Status: In Use

Built 1948

by

American Bridge Company of New York and Condon-Cunningham Company of Omaha, Nebraska

for

Chicago & North Western Railway

Design:
175' Warren through truss and 2-48' steel stringers

Description:
Warren through truss bridge over Boyer River

Significance: