South Dakota bridges
South Dakota reports 5,883 bridges and culverts across 66 counties. 945 (16.1%) are rated in poor condition, and 944 are posted with load limits or closed. The oldest structure still in the inventory dates from 1900.
Find a bridge in South Dakota
Type at least two characters, or pick a condition or type, to search every bridge in the state.
Counties
Circle size reflects the number of bridges- Aurora County 61
- Beadle County 150
- Bennett County 15
- Bon Homme County 126
- Brookings County 232
- Brown County 170
- Brule County 38
- Buffalo County 25
- Butte County 142
- Campbell County 16
- Charles Mix County 103
- Clark County 21
- Clay County 93
- Codington County 75
- Corson County 49
- County 102 35
- Custer County 94
- Davison County 123
- Day County 34
- Deuel County 72
- Dewey County 27
- Douglas County 44
- Edmunds County 20
- Fall River County 80
- Faulk County 46
- Grant County 205
- Gregory County 51
- Haakon County 69
- Hamlin County 61
- Hand County 126
- Hanson County 62
- Harding County 49
- Hughes County 40
- Hutchinson County 160
- Hyde County 23
- Jackson County 89
- Jerauld County 35
- Jones County 37
- Kingsbury County 35
- Lake County 79
- Lawrence County 136
- Lincoln County 207
- Lyman County 114
- Marshall County 38
- McCook County 98
- McPherson County 14
- Meade County 213
- Mellette County 28
- Miner County 63
- Minnehaha County 394
- Moody County 88
- Pennington County 348
- Perkins County 60
- Potter County 24
- Roberts County 158
- Sanborn County 54
- Spink County 176
- Stanley County 37
- Sully County 31
- Todd County 27
- Tripp County 89
- Turner County 143
- Union County 169
- Walworth County 33
- Yankton County 99
- Ziebach County 30
Condition
Good35%(2,038)
Fair49%(2,900)
Poor16%(945)
Counties with the highest share of poor bridges
- Marshall County34.2% of 38
- Hand County31.7% of 126
- Miner County30.2% of 63
- Spink County30.1% of 176
- Kingsbury County28.6% of 35
Structure types
| Structure type | Bridges | Share |
|---|---|---|
| Stringer/Multi-beam or Girder | 1,689 | 28.7% |
| Culvert | 1,683 | 28.6% |
| Slab | 1,269 | 21.6% |
| Tee Beam | 879 | 14.9% |
| Channel Beam | 196 | 3.3% |
| Truss - Thru | 79 | 1.3% |
| Box Beam or Girders - Multiple | 30 | 0.5% |
| Frame | 24 | 0.4% |
| Girder and Floorbeam System | 20 | 0.3% |
| Arch - Deck | 8 | 0.1% |
| Box Beam or Girders - Single or Spread | 3 | 0.1% |
| Arch - Thru | 2 | 0.0% |
| Truss - Deck | 1 | 0.0% |
When South Dakota's bridges were built
Busiest
- I229 over CkFairMinnehaha County · 43,830 vehicles/day
- West 12th Street over Big Sioux RiverGoodMinnehaha County · 40,100 vehicles/day
- E 10th ST over I229FairMinnehaha County · 35,954 vehicles/day
- I229 over W 57th STGoodMinnehaha County · 34,780 vehicles/day
- I029 over Nine Mile CkGoodLincoln County · 33,530 vehicles/day
Longest
- SD044 over Mo. Rv (lk Francis Case)FairCharles Mix County · 5,656 ft
- IRR US012 over Missouri Rv (oahe Lk)FairWalworth County · 5,058 ft
- IRR US212 over Missouri Rv (oahe Lk)FairPotter County · 4,619 ft
- IRR SD1806 over Oahe Lk (grand Rv)FairCorson County · 4,001 ft
- SD037 over Missouri RiverPoorBon Homme County · 2,953 ft
Oldest
- 374th Avenue over Sand CreekFairBeadle County · Built 1900
- 196th Street over Pearl CreekFairBeadle County · Built 1900
- 215th Street over Big Sioux RvPoorBrookings County · Built 1900
- 103rd Street over James RiverPoorBrown County · Built 1900
- 46080 314 St. over Clay Ck DitchPoorClay County · Built 1900
Newest
- 242nd Street over Pipestone CreekGoodMoody County · Built 2025
- I090 W over Burlington Northern RRGoodMinnehaha County · Built 2024
- US014 over Missouri RvGoodHughes County · Built 2024
- I090 E over SD019GoodMinnehaha County · Built 2024
- SD011 over I090GoodMinnehaha County · Built 2024
Who owns South Dakota's bridges
| County | 3,647 | 62.0% |
| State | 1,844 | 31.3% |
| City | 184 | 3.1% |
| Federal | 135 | 2.3% |
| Town / Township | 71 | 1.2% |
| Tribal | 1 | 0.0% |
| Railroad | 1 | 0.0% |
More South Dakota facts
Total bridge length106 miles
Total deck area20,139,870 sq ft
Culverts counted as bridges1,683 (29%)
On the National Highway System988
Posted with load limits867
Closed to traffic77
Listed or eligible for the National Register218
Average daily traffic per bridge1,405 vehicles
Newest structure2025