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Historic Bridges in South Dakota

1,118 bridges built before 1951 in South Dakota still in service today.

Bridges Built Before 1951

The United States has 1,118 bridges in South Dakota built before 1951 that remain in active service. These structures are 75+ years old — many predate modern engineering codes and were not designed for today's traffic volumes and vehicle weights. The average design life of a bridge is 50 years, making these aging structures a significant infrastructure concern.

Clear
Bridge State Condition Year Built Age (Years) ADT
MUD CREEK South Dakota Poor 1935 91 98
CREEK South Dakota Poor 1935 91 98
CROW CREEK DITCH South Dakota Fair 1935 91 97
CREEK South Dakota Poor 1935 91 98
CREEK South Dakota Poor 1935 91 98
CK South Dakota Fair 1935 91 80
SPRING CREEK South Dakota Fair 1935 91 10
CREEK South Dakota Poor 1935 91 48
CREEK South Dakota Poor 1935 91 48
CREEK South Dakota Fair 1935 91 48
CREEK South Dakota Fair 1935 91 48
GREASY HORN CREEK South Dakota Fair 1935 91 287
CREEK South Dakota Fair 1935 91 289
CLAY CK South Dakota Fair 1935 91 35
CK South Dakota Fair 1935 91 97
BAPTIST CK South Dakota Poor 1935 91 15
BIG SIOUX RIVER South Dakota Fair 1935 91 5,053
HAY CREEK South Dakota Fair 1935 91 15
ENEMY CK South Dakota Poor 1935 91 64
ENEMY CK South Dakota Poor 1935 91 15
DRY RUN CK South Dakota Poor 1935 91 47
DRY RUN CK South Dakota Poor 1935 91 25
CK South Dakota Poor 1935 91 40
CREEK South Dakota Poor 1935 91 10
ANTELOPE CREEK South Dakota Poor 1935 91 10
CREEK South Dakota Fair 1935 91 385
CK South Dakota Poor 1935 91 40
CK South Dakota Fair 1935 91 2,034
CK South Dakota Fair 1935 91 2,034
CK South Dakota Fair 1935 91 2,034
CK South Dakota Good 1935 91 2,034
CK South Dakota Good 1935 91 2,034
CK South Dakota Good 1935 91 2,034
CK South Dakota Good 1935 91 2,034
SHAEFER CK South Dakota Poor 1935 91 15
SHAEFER CK South Dakota Good 1935 91 25
CK South Dakota Poor 1935 91 10
CK South Dakota Poor 1935 91 15
SOUTH BR DRY CK South Dakota Fair 1935 91 69
DRY CK South Dakota Poor 1935 91 35
DAWSON CREEK South Dakota Fair 1935 91 241
LONETREE CK South Dakota Fair 1935 91 88
PLUM CK South Dakota Poor 1935 91 69
SOUTH BR LONETREE CK South Dakota Fair 1935 91 45
CK South Dakota Poor 1935 91 15
CK South Dakota Poor 1935 91 35
UNNAMED CREEK South Dakota Good 1935 91 27
COTTONWOOD CK South Dakota Poor 1935 91 10
SOUTH FORK BAD RIVER South Dakota Poor 1935 91 11
OUTLET FOR LAKE SPILLWAY South Dakota Poor 1935 91 35

About Historic Bridge Data

Bridges built before 1951 are classified as historic in this database. Many were designed to 1940s standards with lower load limits and narrower lanes. While FHWA requires regular inspections of all bridges regardless of age, older structures often require more frequent monitoring and rehabilitation investment.

All Bridges Poor Condition Scour Critical Bridge Stats