Total Bridges
5,905
Public highway bridges in South Dakota
State profile · Above national median SD
South Dakota bridge safety
Condition ratings, load ratings, and structural-deficiency data for every public highway bridge in South Dakota — drawn straight from the FHWA National Bridge Inventory.
- 5,905
- Public bridges
- 31.9%
- Good condition
- 16.2%
- Poor condition
- 16.2%
- Structurally deficient
Good Condition
31.9%
1,885 bridges rated 7-9
-18.1pp vs 50% benchmark
Poor Condition
16.2%
959 bridges rated 0-4
Structurally Deficient
16.2%
959 bridges flagged for repair priority
9.2pp vs national avg 7.0%
South Dakota vs national bridge condition
South Dakota — Good condition share 31.9%
National avg
Share of bridges rated 7-9 on the FHWA 0-9 scale (deck, superstructure, substructure all good).
South Dakota — Structurally deficient share 54.1%
National avg
Lower is better. Bar maxes at 30% (worst-state ceiling). National average sits at 7.0%.
Condition Distribution
Bridge inventory deck-condition mix — South Dakota (FHWA NBI)
Counties (66)
Aurora 61 Beadle 153 Bennett 15 Bon Homme 126 Brookings 234 Brown 170 Brule 38 Buffalo 25 Butte 143 Campbell 15 Charles Mix 103 Clark 21 Clay 94 Codington 74 Corson 49 Custer 95 Davison 125 Day 37 Deuel 72 Dewey 28 Douglas 44 Edmunds 20 Fall River 80 Faulk 46 Grant 205 Gregory 51 Haakon 69 Hamlin 62 Hand 126 Hanson 62 Harding 49 Hughes 41 Hutchinson 161 Hyde 23 Jackson 89 Jerauld 35 Jones 37 Kingsbury 35 Lake 79 Lawrence 136 Lincoln 207 Lyman 114 Marshall 39 McCook 98 McPherson 14 Meade 217 Mellette 28 Miner 64 Minnehaha 395 Moody 87 Oglala Lakota 34 Pennington 350 Perkins 60 Potter 24 Roberts 157 Sanborn 53 Spink 176 Stanley 37 Sully 31 Todd 24 Tripp 90 Turner 143 Union 172 Walworth 34 Yankton 99 Ziebach 30
South Dakota vs nearby ranks
Adjacent states on the structurally deficient leaderboard (lower share = better)
States are ranked by share of bridges flagged structurally deficient — the FHWA classification for any span where deck, superstructure, or substructure carries a condition rating of 4 or below. Lower percentages indicate stronger maintenance funding and inspection follow-through. States here sit immediately above and below South Dakota on the same metric.
66
Guam
15.25% top marginal rate
54
West Virginia
16.02% top marginal rate
46
South Dakota
16.24% top marginal rate
19
Iowa
20.01% top marginal rate
78
Virgin Islands
29.17% top marginal rate
Bridges Needing Most Attention in South Dakota
Six lowest-condition bridges in South Dakota, ranked by composite NBI rating. Each is inspected at least every 24 months.
483 AVENUE
Structurally DeficientOver: WHETSTONE RV
4.8E & 3.2N MILBANK, Grant, SD
Built 1962 Load: 0.9 t ADT: 25
202ND ST.
Structurally DeficientOver: BEAR BUTTE CK
5.3E BEAR BUTTE, Meade, SD
Built 2000 Load: 0.9 t ADT: 50
45980 303 ST.
Structurally DeficientOver: VERMILLION RV
6S & 7.8E IRENE, Clay, SD
Built 1909 Load: 1.8 t ADT: 15
460th Avenue
Structurally DeficientOver: Big Coulee Creek
4S & 2W of Peever, Roberts, SD
Built 1950 Load: 2.2 t ADT: 22
197TH ST
Structurally DeficientOver: TURTLE CK
1N & 1E ST LAWRENCE, Hand, SD
Built 1925 Load: 2.5 t ADT: 25
242 ST
Structurally DeficientOver: CK
1.8E 11.0N PLANKINTON, Aurora, SD
Built 1917 Load: 2.7 t ADT: 101
All Bridges in South Dakota
415TH AVE.
FairOver: JIM CK
0.5E & 1.5S ARTESIAN, Sanborn, SD
Built 1930 Load: 15.5 t ADT: 56
196th Street
FairOver: Pearl Creek
7.5N & 5.4E of Yale, Beadle, SD
Built 1900 Load: 15.6 t ADT: 103
244TH STREET
FairOver: SKUNK CK
4N & 4.6E COLTON, Minnehaha, SD
Built 1980 Load: 15.7 t ADT: 64
HUETHER RD.
FairOver: TRIB TO CHEYENNE RIVER
2.5W 5.3N CONATA, Pennington, SD
Built 1940 Load: 15.7 t ADT: 15
214th Street
FairOver: Cain Creek
2.0E of Virgil, Beadle, SD
Built 1952 Load: 15.8 t ADT: 233
31500 455 AVE
FairOver: YANKTON CLAY DITCH
18S & 3E IRENE SD, Clay, SD
Built 1938 Load: 15.8 t ADT: 25
204th Street
FairOver: HERMAPHRODITE CK
5N & 1W HWYS 34 & 63, Haakon, SD
Built 1950 Load: 15.8 t ADT: 28
30990 457 AVE.
FairOver: CLAY CK DITCH
0.4E & 3.8N MECKLING, Clay, SD
Built 2018 Load: 15.9 t ADT: 91
212TH STREET
FairOver: CK
2.9W BROOKINGS, Brookings, SD
Built 1982 Load: 16.0 t ADT: 92
405th Avenue
FairOver: Pearl Creek
4W & 8.3S of Cavour, Beadle, SD
Built 1953 Load: 16.1 t ADT: 80
29060 418 AVE.
FairOver: DAWSON CK
0.6S KAYLOR, Hutchinson, SD
Built 1953 Load: 16.2 t ADT: 320
42340 287 STR.
FairOver: SOUTH BR LONETREE CK
1 S & 2.6 W OLIVET, Hutchinson, SD
Built 1935 Load: 16.2 t ADT: 45
41590 311th Street
FairOver: Creek
1N & 1E of Springfield, Bon Homme, SD
Built 1935 Load: 16.3 t ADT: 100
RILEY RD
FairOver: INDIAN CK
6.0 W 2.3 N NEWELL, Butte, SD
Built 1950 Load: 16.3 t ADT: 47
27070 392 AVE
FairOver: CHOTEAU CK
2.3N & 3E OF CORSICA, Douglas, SD
Built 1978 Load: 16.3 t ADT: 25
Old NE Road
FairOver: Unnamed Creek
0.3W CACTUS FLAT, Jackson, SD
Built 1950 Load: 16.3 t ADT: 35
207TH STREET
FairOver: BIG SIOUX RV
4N & 0.8E VOLGA, Brookings, SD
Built 1955 Load: 16.5 t ADT: 92
463rd Avenue
FairOver: Big Sioux River
2W & 1.6N of Estelline, Hamlin, SD
Built 1953 Load: 16.5 t ADT: 119
47700 300 STR.
FairOver: CK
1N & 2W ALCESTER, Union, SD
Built 1982 Load: 16.5 t ADT: 35
474 AVENUE
FairOver: SOUTH FORK WHETSTONE RV
4W & 0.4N MILBANK, Grant, SD
Built 1936 Load: 16.6 t ADT: 52
30330 453 AVE
FairOver: CK
6.3S & 1E IRENE, Clay, SD
Built 1930 Load: 16.7 t ADT: 97
Township Road
FairOver: HAY CREEK
0.8E & 0.2S MORRISTOWN, Corson, SD
Built 1935 Load: 16.7 t ADT: 15
IRR BIA RTE 7
FairOver: MOREAU RIVER
.7 KM NORTH OF PROMISE, Dewey, SD
Built 1961 Load: 16.7 t ADT: 105
BRUSHIE CREEK RD.
FairOver: CK
12 S 1 W FAITH, Meade, SD
Built 1955 Load: 16.7 t ADT: 29
HWY 1416
FairOver: Trib. to Box Elder Creek
8.1E NEW UNDERWOOD, Pennington, SD
Built 1936 Load: 16.7 t ADT: 115
216TH STREET
FairOver: CK
4S & 3.3W BROOKINGS, Brookings, SD
Built 1955 Load: 16.8 t ADT: 447
OLD HWY 85
FairOver: SPUR CK
6 N 17.4 W HOOVER, Butte, SD
Built 1936 Load: 16.8 t ADT: 21
28540 407 AVE.
FairOver: EAST FORK CHOTEAU CK
1.6N,4.5W OF TRIPP, Hutchinson, SD
Built 1940 Load: 16.8 t ADT: 30
241ST STREET
FairOver: MORRIS CK
3.9W LETCHER, Sanborn, SD
Built 1930 Load: 16.9 t ADT: 253
FAS 6253
FairOver: ASH CK
15 W 5.5 N PHILIP, Haakon, SD
Built 1955 Load: 17.0 t ADT: 48
BIXBY ROAD
FairOver: RABBIT CK
5.7 W 10.1 S BISON, Perkins, SD
Built 1963 Load: 17.0 t ADT: 139
295th Ave.
FairOver: KEYA PAHA RV
13.2S 8.0E OKREEK, Todd, SD
Built 1948 Load: 17.0 t ADT: 27
STATE PARK RD
FairOver: STOCKADE LAKE INLET
3.3E .1N CUSTER, Custer, SD
Built 1997 Load: 17.1 t ADT: 30
STATE PARK RD
FairOver: SOUTH SCALP CK
11.4W & 2.0N PICKSTOWN, Gregory, SD
Built 1963 Load: 17.1 t ADT: 50
SD248
FairOver: BR MEDICINE CK
1.6 E OF DRAPER, Jones, SD
Built 1941 Load: 17.1 t ADT: 220
227 ST
FairOver: REDSTONE CK
5S & 5.7W CARTHAGE, Miner, SD
Built 1929 Load: 17.1 t ADT: 20
US012
FairOver: CK
4.0 W JCT US 83 N, Walworth, SD
Built 1965 Load: 17.1 t ADT: 1,389
30780 441st Avenue
FairOver: Marne Creek
1.2N &1E of Yankton, Yankton, SD
Built 1964 Load: 17.1 t ADT: 33
164 STREET
FairOver: SOUTH FORK YELLOW BANK R
4.2W & 0.5S REVILLO, Grant, SD
Built 1936 Load: 17.2 t ADT: 52
28810 418 AVE.
FairOver: SOUTH BR LONETREE CK
1.9N KAYLOR, Hutchinson, SD
Built 1953 Load: 17.2 t ADT: 428
219TH STREET
FairOver: REDSTONE CK
4 S & 3.5 E ESMOND, Kingsbury, SD
Built 1963 Load: 17.2 t ADT: 45
29490 395th Avenue
FairOver: Choteau Creek
1.1N of Wagner, Charles Mix, SD
Built 1955 Load: 17.3 t ADT: 564
477 AVENUE
FairOver: NORTH FORK WHETSTONE RV
6N & 1W MILBANK, Grant, SD
Built 1936 Load: 17.3 t ADT: 52
44760 285 ST
FairOver: TURKEY RIDGE CK
11S & 0.6E MARION, Turner, SD
Built 2002 Load: 17.3 t ADT: 50
44790 285TH ST
FairOver: TURKEY RIDGE CK
11S & 0.9E MARION, Turner, SD
Built 2002 Load: 17.3 t ADT: 50
43180 302nd Street
FairOver: Beaver Creek
2S & 1.8E of Lesterville, Yankton, SD
Built 1937 Load: 17.3 t ADT: 40
39510 284 ST
FairOver: CHOTEAU CK
5.9 W. DELMONT, Douglas, SD
Built 1925 Load: 17.4 t ADT: 320
47730 309 STR.
FairOver: CK
7.5S & 1.7W ALCESTER, Union, SD
Built 1977 Load: 17.4 t ADT: 180
203RD STREET
FairOver: CK
9.7W BRUCE, Brookings, SD
Built 1930 Load: 17.5 t ADT: 92
350 AVENUE
FairOver: COON CK
3N & 6E BURKE, Gregory, SD
Built 1949 Load: 17.5 t ADT: 10
Showing 601-650 of 5,905 bridges
Data sourced from the FHWA National Bridge Inventory (NBI), latest released cycle. See our methodology for details. Retrieved and formatted by PlainBridges Editorial.
Disclaimer: This information is provided for informational purposes only and does not constitute professional advice. Data is sourced from the FHWA National Bridge Inventory (NBI). A "structurally deficient" rating is a repair-priority signal, not a closure or unsafe-to-cross designation. Consult a qualified civil engineer before making decisions based on this data.
Understanding Bridge Conditions
How FHWA rates bridge condition on a 0-9 scale.
Check Your Daily Bridges
How to look up bridge condition data for bridges on your route.
Read our methodology — how this data is sourced, computed, and verified.
| Publisher | Kiznis Studio |
| Sources | FHWA National Bridge Inventory, public U.S. government datasets |