This steel stringer bridge carries a former Chicago & North Western Railway secondary line over a farm road east of Polk City

Polk City, Polk County, Iowa

Owner: Polk County Conservation Board

Status: Open to Pedestrian Traffic

Built 1914

by

Unknown and Cleary-White Construction Company of Chicago, Illinois

for

Chicago & North Western Railway

Design:
20' steel stringer

Description:
Steel stringer bridge over farm road

Significance:

This small stone arch culvert carries a former Chicago, Rock Island & Pacific Railroad (Rock Island) mainline over an unnamed creek near Northeast 27th Avenue southwest of Altoona

Altoona, Polk County, Iowa

Owner: Iowa Interstate Railroad

Status: In Use

Built c. 1875

by

Unknown

for

Chicago, Rock Island & Pacific Railway

Design:
6' stone arch culvert

Description:
Stone arch culvert over unnamed creek

Significance:

This deck plate girder bridge once carried a former Des Moines & Central Iowa Railway line over Beaver Creek north of Interstate 35/80 in Johnston

Johnston, Polk County, Iowa

Owner: City of Johnston

Status: Replaced by a new bridge

Built c. 1960 using spans fabricated c. 1910

by

Unknown

for

Des Moines & Central Iowa Railway

Design:
2-36' deck plate girders and timber pile trestle

Description:
Deck plate girder bridge over Beaver Creek

Significance:

This steel stringer and timber pile trestle bridge carries a former Des Moines & Central Iowa Railway line over Iowa Highway 415 (2nd Avenue) and an unnamed creek on the north side of Des Moines

Des Moines, Polk County, Iowa

Owner: Union Pacific Railroad

Status: In Use

Built 1942

by

Unknown

for

Des Moines & Central Iowa Railway

Design:
2-33' steel stringers and timber pile trestle

Description:
Steel stringer and timber pile trestle bridge over Iowa Highway 415 (2nd Avenue) and unnamed creek

Significance:

This large deck plate girder bridge carries a former Chicago Great Western Railway mainline over the South Skunk River between Santiago and Valeria

Santiago, Polk County, Iowa

Owner: Polk County Conservation Board

Status: Open to Pedestrian Traffic

Built 1921 and 1928

by

American Bridge Company of New York and Unknown

for

Chicago Great Western Railway

Design:
4-70' deck plate girders and timber pile trestle

Description:
Deck plate girder bridge over South Skunk River

Significance:

This steel stringer bridge carries a former Chicago & North Western Railway secondary line over an unnamed creek northeast of Polk City

Polk City, Polk County, Iowa

Owner: Polk County Conservation Board

Status: Open to Pedestrian Traffic

Built 1913

by

American Bridge Company of New York and Cleary-White Construction Company of Chicago, Illinois

for

Chicago & North Western Railway

Design:
18' steel stringer

Description:
Steel stringer bridge over unnamed creek

Significance:

This steel stringer and timber pile trestle bridge carries a former Chicago Great Western Railway mainline over Fourmile Creek in Berwick

Berwick, Polk County, Iowa

Owner: Polk County Conservation Board

Status: Open to Pedestrian Traffic

Built c. 1960

by

Unknown

for

Chicago Great Western Railway

Design:
50' steel stringer and timber pile trestle

Description:
Steel stringer and timber pile trestle bridge over Fourmile Creek

Significance:

This iconic through truss bridge carries the former Des Moines Union Railway mainline across the Des Moines River between Court Avenue and Vine Street in Des Moines

Des Moines, Polk County, Iowa

Owner: City of Des Moines

Status: Open to Pedestrian Traffic

Built 1891, 1905 and 1945 and 2006

by

Detroit Bridge & Iron Works of Detroit, Michigan; Des Moines Bridge & Iron Works of Des Moines, Iowa; Stupp Brothers Bridge & Iron Company of St. Louis, Missouri and others

for

Des Moines Union Railway

Design:
2-152' Pratt through trusses, 1-78' through plate girder, 1-68' deck plate girder, 1-25' steel stringer and 1-45' steel stringer

Description:
Pratt through truss bridge over Des Moines River

Significance:

This unique through plate girder bridge carries a former Chicago, Milwaukee, St. Paul & Pacific Railroad (Milwaukee Road) branch line over Walnut Creek at Campbell Park in Clive

Clive, Polk County, Iowa

Owner: City of Clive

Status: Open to Pedestrian Traffic

Built 1917 using a span fabricated 1889

by

Lassig Bridge & Iron Works of Chicago, Illinois

for

Chicago, Milwaukee & St. Paul Railway

Design:
65' through plate girder and timber pile trestle

Description:
Through plate girder bridge over Walnut Creek

Significance:

This small stone arch culvert carries a former Chicago Great Western Railway mainline and Southwest 42nd Street over Frink Creek on the south side of Des Moines

Des Moines, Polk County, Iowa

Owner: Polk County Conservation Board

Status: Open to Pedestrian Traffic

Built c. 1900 and 1972

by

Unknown

for

Chicago Great Western Railway

Design:
10' stone arch culvert

Description:
Stone arch culvert over Frink Creek

Significance: