This stone arch bridge carries the former Chicago & North Western Railway mainline over Halweg Road west of Merrimac

Merrimac, Sauk County, Wisconsin

Owner: State of Wisconsin (Operated by Wisconsin & Southern Railroad)

Status: In Use

Built 1878 and widened 1896

by

Unknown and John A. & George Garden of Romeoville, Illinois

for

Chicago & North Western Railway

Design:
24' stone arch

Description:
Stone arch bridge over Halweg Road

Significance:

This deck plate girder bridge is the northern bridge carrying the former Chicago & North Western Railway mainline over the Baraboo River in Ablemans Gorge near Rock Springs

Rock Springs, Sauk County, Wisconsin

Owner: State of Wisconsin (Operated by Wisconsin & Southern Railroad)

Status: In Use

Built 1899

by

Lassig Bridge & Iron Works of Chicago, Illinois

for

Chicago & North Western Railway

Design:
1-81', 1-52', 1-49' deck plate girders

Description:
Deck plate girder bridge over Baraboo River

Significance:

This large stone arch bridge carries the former Chicago & North Western Railway mainline over an unnamed creek in Baraboo

Baraboo, Sauk County, Wisconsin

Owner: State of Wisconsin (Operated by Wisconsin & Southern Railroad)

Status: In Use

Built 1879 and widened 1896

by

Unknown and John A. & George Garden of Romeoville, Illinois

for

Chicago & North Western Railway

Design:
32' stone arch

Description:
Stone arch bridge over unnamed creek

Significance:

This large through truss and girder bridge carries the former Chicago, Milwaukee, St. Paul & Pacific Railroad across the Wisconsin River at Spring Green

Spring Green, Sauk County, Wisconsin to Arena, Iowa County, Wisconsin

Owner: State of Wisconsin (Operated by Wisconsin & Southern Railroad)

Status: In Use

Built 1899, 1927 and 1944 using spans fabricated 1895 and c. 1900

by

Lassig Bridge & Iron Works of Chicago, Illinois; American Bridge Company of New York and Unknown

for

Chicago, Milwaukee, St. Paul & Pacific Railroad

Design:
1-205' Pratt through truss swing span, 2-113' Pratt through trusses, 2-53' through plate girders, 1-75', 2-70', 1-68' and 1-60' deck plate girders and steel stringer

Description:
Pratt through truss and girder bridge over Wisconsin River

Significance:

This deck plate girder bridge carries the former Chicago & North Western Railway mainline over the Baraboo River alongside Wisconsin Highway 136 northwest of Rock Springs

Rock Springs, Sauk County, Wisconsin

Owner: State of Wisconsin (Operated by Wisconsin & Southern Railroad)

Status: In Use

Built 1899

by

Lassig Bridge & Iron Works of Chicago, Illinois

for

Chicago & North Western Railway

Design:
1-75' and 1-50' deck plate girder and timber pile trestle

Description:
Deck plate girder bridge over Baraboo River

Significance:

This deck plate girder bridge carries the former Chicago & North Western Railway mainline over the Baraboo River in Reedsburg

Reedsburg, Sauk County, Wisconsin

Owner: State of Wisconsin (Operated by Wisconsin & Southern Railroad)

Status: In Use and Open to Pedestrians

Built 1898

by

Lassig Bridge & Iron Works of Chicago, Illinois

for

Chicago & North Western Railway

Design:
3-75' deck plate girders

Description:
Deck plate girder bridge over Baraboo River

Significance:

This large deck truss and deck plate girder bridge carries the former Chicago & North Western Railway mainline over Lake Wisconsin (Wisconsin River) in Merrimac and has seen numerous alterations over the years

Merrimac, Sauk County, Wisconsin to Okee, Columbia County, Wisconsin

Owner: State of Wisconsin (Operated by Wisconsin & Southern Railroad)

Status: In Use

Built 1895 and 1930; reconstructed 1930 and 2023-24

by

Lassig Bridge & Iron Works of Chicago, Illinois and Unknown

for

Chicago & North Western Railway

Design:
Double intersection warren deck truss and deck plate girder

Description:
Double intersection Warren deck truss and deck plate girder bridge over Lake Wisconsin (Wisconsin River)

Significance:

This deck plate girder bridge carries the former Chicago & North Western Railway mainline over Baraboo Street in Merrimac

Merrimac, Sauk County, Wisconsin

Owner: State of Wisconsin (Operated by Wisconsin & Southern Railroad)

Status: In Use

Built 1896

by

Lassig Bridge & Iron Works of Chicago, Illinois and John A. & George Garden of Romeoville, Illinois

for

Chicago & North Western Railway

Design:
32' deck plate girder

Description:
Deck plate girder bridge over Baraboo Street

Significance:

This unique pony truss and through girder bridge once carried the Chicago, Milwaukee, St. Paul & Pacific (Milwaukee Road) Prairie du Sac Branch over the Wisconsin River at Sauk City

Sauk City, Sauk County, Wisconsin

Owner: State of Wisconsin

Status: Replaced By a New Pedestrian Bridge

Built 1910 and 1943 using spans fabricated 1892, 1897 and c. 1899

by

Lassig Bridge & Iron Works of Chicago, Illinois and Wisconsin Bridge & Iron Company of North Milwaukee, Wisconsin

for

Chicago, Milwaukee & St. Paul Railway

Design:
123' through plate girder swing span, 1-112' and 1-98' Pratt pony trusses and 2-55' through plate girders

Description:
Pratt pony truss and through plate girder bridge over Wisconsin River

Significance:

This Warren deck truss bridge is the southern bridge carrying the former Chicago & North Western Railway mainline over the Baraboo River in Ablemans Gorge near Rock Springs

Rock Springs, Sauk County, Wisconsin

Owner: State of Wisconsin (Operated by Wisconsin & Southern Railroad)

Status: In Use

Built 1899

by

Lassig Bridge & Iron Works of Chicago, Illinois

for

Chicago & North Western Railway

Design:
1-124' Warren deck truss and 1-46' and 1-29' through plate girders

Description:
Warren deck truss bridge over Baraboo River

Significance: