This concrete arch bridge carries a former Chicago, Milwaukee, St. Paul & Pacific Railroad (Milwaukee Road) mainline over Murphy Creek on the west side of Madrid

Madrid, Boone County, Iowa

Owner: Boone County Conservation Board

Status: Open to Pedestrian Traffic

Built 1913

by

Chicago, Milwaukee & St. Paul Railway

Design:
16' concrete arch

Description:
Concrete arch bridge over Murphy Creek

Significance:

This trough floor steel stringer bridge carries a former Chicago & North Western Railway mainline over Linn Street in Boone

Boone, Boone County, Iowa

Owner: Union Pacific Railroad

Status: In Use

Built 1910

by

American Bridge Company of New York and Unknown

for

Chicago & North Western Railway

Design:
35' trough floor steel stringer

Description:
Trough floor steel stringer bridge over Linn Street

Significance:

This historic double intersection Warren pony truss bridge carries J Avenue over a former Chicago & North Western Railway mainline east of Ogden

Ogden, Boone County, Iowa

Owner: Union Pacific Railroad

Status: Open to Automobile Traffic

Built 1900 using a span fabricated c. 1882

by

Unknown and Widell Company of Mankato, Minnesota

for

Chicago & North Western Railway

Design:
75' double intersection Warren pony truss and timber pile trestle

Description:
Double intersection Warren pony truss bridge over Union Pacific Railroad

Significance:

This stone arch bridge carries a former Chicago & North Western Railway mainline over East Beaver Creek on the west side of Ogden

Ogden, Boone County, Iowa

Owner: Union Pacific Railroad

Status: In Use

Built 1900

by

Widell Company of Mankato, Minnesota

for

Chicago & North Western Railway

Design:
20' stone arch

Description:
Stone arch bridge over East Beaver Creek

Significance:

This deck plate girder bridge was the eighth and final crossing of Honey Creek on the original Chicago & North Western Railway mainline through Moingona

Moingona, Boone County, Iowa

Owner: United States of America

Status: Removed but not replaced

Built 1898

by

Unknown

for

Chicago & North Western Railway

Design:
79' deck plate girder

Description:
Deck plate girder bridge over Honey Creek

Significance:

This deck plate girder bridge carries a former Chicago & North Western Railway mainline across Beaver Creek at Beaver

Beaver, Boone County, Iowa

Owner: Union Pacific Railroad

Status: In Use

Built 1901

by

American Bridge Company of New York (Lassig Plant) and Widell Company of Mankato, Minnesota

for

Chicago & North Western Railway

Design:
2-68' deck plate girders

Description:
Deck plate girder bridge over Beaver Creek

Significance:

This steel stringer bridge carries a former Chicago & North Western Railway mainline over County Road R38 (500th Avenue/Y Avenue) on the west edge of Ames

Ames, Story County, Iowa to Jordan, Boone County, Iowa

Owner: Union Pacific Railroad

Status: In Use

Built 1941

by

Des Moines Steel Company of Des Moines, Iowa; Widell Company of Mankato, Minnesota and Unknown

for

Chicago & North Western Railway

Design:
45' steel stringer

Description:
Steel stringer bridge over County Road R38 (500th Avenue/Y Avenue)

Significance:

This iconic Baltimore deck truss and deck plate girder viaduct carries a former Chicago & North Western Railway mainline over the Des Moines River between Boone and Ogden

Boone, Boone County, Iowa to Ogden, Boone County, Iowa

Owner: Union Pacific Railroad

Status: Bypassed and Closed To Traffic

Built 1899-1901

by

American Bridge Company of New York (Various Shops); Widell Company of Mankato, Minnesota and Engineering Contract Company of New York

for

Chicago & North Western Railway

Design:
300' Baltimore deck truss and 21-75' and 18-45' deck plate girders

Description:
Baltimore deck truss and deck plate girder viaduct over Des Moines River and Juneberry Road

Significance:

This deck plate girder bridge carries a former Chicago, Milwaukee, St. Paul & Pacific Railroad (Milwaukee Road) mainline over Big Creek between Slater and Madrid

Madrid, Boone County, Iowa

Owner: Boone County Conservation Board

Status: Open to Pedestrian Traffic

Built 1912

by

Unknown

for

Chicago, Milwaukee & St. Paul Railway

Design:
65' deck plate girder

Description:
Deck plate girder bridge over Big Creek

Significance:

This stone arch bridge carries a former Chicago & North Western Railway mainline over Polecat Creek west of Boone

Boone, Boone County, Iowa

Owner: Union Pacific Railroad

Status: In Use

Built 1899

by

Widell Company of Mankato, Minnesota

for

Chicago & North Western Railway

Design:
12' stone arch

Description:
Stone arch bridge over Polecat Creek

Significance: