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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
CK South Dakota Poor 1925 101 15
NORTH BR TWELVE MILE CK South Dakota Poor 1925 101 53
NORTH BR TWELVE MILE CK South Dakota Fair 1925 101 433
BR CHOTEAU CK South Dakota Poor 1925 101 330
CHOTEAU CK South Dakota Fair 1925 101 320
CK South Dakota Fair 1925 101 10
CK South Dakota Poor 1925 101 35
CK South Dakota Fair 1925 101 10
TURTLE CK South Dakota Poor 1925 101 25
CAIN CK South Dakota Poor 1925 101 18
CK South Dakota Poor 1925 101 20
NORTH BR DRY CK South Dakota Fair 1925 101 69
CROW CK South Dakota Poor 1925 101 42
W. FORK OF VERMILLION RV South Dakota Fair 1925 101 157
W. FORK OF VERMILLION RV South Dakota Fair 1925 101 155
TRIB. TO W FORK VERM RV South Dakota Fair 1925 101 45
TRIB. TO E FORK VERM RV South Dakota Fair 1925 101 66
ELK CK South Dakota Fair 1925 101 15
SULFUR CK South Dakota Fair 1925 101 30
SULPHUR CK South Dakota Poor 1925 101 30
ROCK CK South Dakota Poor 1925 101 25
CK South Dakota Poor 1925 101 61
TRIB. TO BIG SIOUX RIVER South Dakota Fair 1925 101 614
TRIB. TO JACK MOORE CRK South Dakota Fair 1925 101 330
SOUTH FORK SNAKE CREEK South Dakota Poor 1925 101 55
CREEK South Dakota Fair 1926 100 56
CAIN CREEK South Dakota Poor 1926 100 56
UNNAMED CREEK South Dakota Fair 1926 100 56
CREEK South Dakota Poor 1926 100 115
CK South Dakota Poor 1926 100 25
CK South Dakota Poor 1926 100 100
CK South Dakota Poor 1926 100 100
CK South Dakota Poor 1926 100 15
TRIB. TO BIG SIOUX RIVER South Dakota Fair 1926 100 125
CK South Dakota Poor 1926 100 10
CK South Dakota Poor 1926 100 10
ROCK CK South Dakota Poor 1926 100 25
CK South Dakota Good 1926 100 1,089
MUD CREEK South Dakota Fair 1926 100 55
GRACE COOLIDGE CK South Dakota Fair 1927 99 1,562
CREEK South Dakota Fair 1927 99 25
CREEK South Dakota Fair 1927 99 15
CK South Dakota Poor 1927 99 20
CREEK South Dakota Poor 1928 98 69
SAND CREEK South Dakota Fair 1928 98 56
SAND CREEK South Dakota Poor 1928 98 56
CAIN CK South Dakota Poor 1928 98 56
CREEK South Dakota Poor 1928 98 56
CREEK South Dakota Poor 1928 98 56
PEARL CREEK South Dakota Fair 1928 98 56

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