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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 Good 1938 88 25
EAST FORK VERMILLION RV South Dakota Fair 1938 88 35
SPRING CK South Dakota Poor 1938 88 335
TRIB. TO VERMILLION RVR South Dakota Fair 1938 88 45
SNAKE CREEK South Dakota Fair 1938 88 150
SADDLE CREEK South Dakota Poor 1938 88 150
TRIB TO BIG SIOUX RV South Dakota Poor 1938 88 974
TRIB TO SILVER CREEK South Dakota Fair 1938 88 41
SLIP-UP CREEK South Dakota Poor 1938 88 80
TRIB TO SPLIT ROCK CK South Dakota Poor 1938 88 46
TRIB TO SPLIT ROCK CK South Dakota Fair 1938 88 19
CREEK South Dakota Poor 1938 88 10
N. FORK WHETSTONE RV South Dakota Fair 1938 88 195
CLAY CREEK South Dakota Fair 1938 88 55
SILVER CREEK South Dakota Fair 1939 87 85
CREEK South Dakota Good 1939 87 131
CREEK South Dakota Fair 1939 87 137
STONY RUN CREEK South Dakota Fair 1939 87 93
BYRON LK South Dakota Good 1939 87 50
CREEK South Dakota Poor 1939 87 138
WILLOW CK South Dakota Fair 1939 87 3,961
SOUTH FORK SNAKE CK South Dakota Poor 1939 87 688
CK South Dakota Fair 1939 87 238
CK South Dakota Fair 1939 87 150
PONY CK South Dakota Poor 1939 87 81
SOUTH BR LONETREE CK South Dakota Fair 1939 87 69
EAST FORK VERMILLION RV South Dakota Fair 1939 87 165
TRIB. TO BIG SIOUX RIVER South Dakota Fair 1939 87 348
BIG SIOUX RIVER South Dakota Fair 1939 87 2,500
LITTLE MINNESOTA RIVER South Dakota Poor 1939 87 68
JORGENSON RIVER South Dakota Fair 1939 87 198
JAMES RIVER South Dakota Fair 1939 87 39
CK South Dakota Poor 1939 87 35
CK South Dakota Fair 1939 87 97
CK South Dakota Fair 1940 86 55
FIRESTEEL CK South Dakota Poor 1940 86 33
CK South Dakota Fair 1940 86 24
SILVER CREEK South Dakota Fair 1940 86 260
CREEK South Dakota Fair 1940 86 56
CREEK South Dakota Poor 1940 86 213
CREEK South Dakota Fair 1940 86 56
PEARL CREEK South Dakota Fair 1940 86 56
CREEK South Dakota Fair 1940 86 90
TRIB TO SNATCH CK South Dakota Poor 1940 86 88
BEAVER CREEK South Dakota Poor 1940 86 130
BR OF NORTH DEER CK South Dakota Poor 1940 86 92
SIXMILE CK South Dakota Poor 1940 86 92
SIX MILE CK South Dakota Poor 1940 86 92
CK South Dakota Fair 1940 86 92
WILLOW CREEK South Dakota Fair 1940 86 98

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