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
41340 270 STR.
FairOver: COFFEE CK
5N 3.5E PARKSTON, Hutchinson, SD
Built 1934 Load: 18.8 t ADT: 257
Shore Drive
FairOver: GAVINS POINT POWERHOUSE
5 Miles West of Yankton, Yankton, SD
Built 1954 Load: 18.8 t ADT: 1,029
196th Street
FairOver: James River
12N & 1.8E of Huron, Beadle, SD
Built 1957 Load: 18.9 t ADT: 205
US014
FairOver: CK
5.4 E HYDE CO LINE, Hand, SD
Built 1935 Load: 18.9 t ADT: 1,935
421 AVE
FairOver: REDSTONE CK
7.5N FEDORA, Miner, SD
Built 1930 Load: 18.9 t ADT: 50
214th Street
FairOver: James River
2.5E & 6S of Huron, Beadle, SD
Built 1958 Load: 19.0 t ADT: 39
42480 292nd Street
FairOver: Dawson Creek
0.5N & 1.8E of Scotland, Bon Homme, SD
Built 1958 Load: 19.0 t ADT: 630
353RD AVE
FairOver: SOUTH FORK SNAKE CK
0.5N FAULKTON, Faulk, SD
Built 1952 Load: 19.0 t ADT: 402
373 AVENUE
FairOver: CK
4.4S JCT SD 34, Jerauld, SD
Built 1954 Load: 19.0 t ADT: 160
303 AVENUE
FairOver: KEYAPAHA RV
1.6E & 1.2N KEYAPAHA, Tripp, SD
Built 1959 Load: 19.0 t ADT: 71
40650 301st Street
FairOver: Trib. to Dry Choteau Ck
1N of Avon, Bon Homme, SD
Built 1984 Load: 19.1 t ADT: 60
40690 299th Street
FairOver: Trib. to Dry Choteau Ck
3N of Avon, Bon Homme, SD
Built 1990 Load: 19.1 t ADT: 60
41099 308th Street
FairOver: Emanuel Creek
1N & 4.1W Hwys 52 & 37, Bon Homme, SD
Built 1983 Load: 19.1 t ADT: 60
41150 305th Street
FairOver: Little Emanuel Creek
4.5W & 1S of Tyndall, Bon Homme, SD
Built 1986 Load: 19.1 t ADT: 127
41090 311th Street
FairOver: Emanuel Creek
2.1W & 1N of Springfield, Bon Homme, SD
Built 1989 Load: 19.1 t ADT: 90
41240 293rd Street
FairOver: Emanuel Creek
10N & 3.6W of Tyndall, Bon Homme, SD
Built 1972 Load: 19.1 t ADT: 75
29450 413th Avenue
FairOver: Emanuel Creek
8.5N & 3W of Tyndall, Bon Homme, SD
Built 1984 Load: 19.1 t ADT: 50
30540 413th Avenue
FairOver: Emanuel Creek
3W & 1.4S of Tyndall, Bon Homme, SD
Built 1983 Load: 19.1 t ADT: 60
41410 298th Street
FairOver: Emanuel Creek
1.9W & 5N of Tyndall, Bon Homme, SD
Built 1981 Load: 19.1 t ADT: 60
41690 308th Street
FairOver: Silver Creek
4S & 0.1W of Tyndall, Bon Homme, SD
Built 1930 Load: 19.1 t ADT: 60
30810 417th Avenue
FairOver: Silver Creek
4.1S of Tyndall, Bon Homme, SD
Built 1972 Load: 19.1 t ADT: 60
41850 310th Street
FairOver: Deadman Creek
2.5N&3.5E of Springfield, Bon Homme, SD
Built 1987 Load: 19.1 t ADT: 60
42020 310th Street
FairOver: Snatch Creek
2N & 5.2E of Springfield, Bon Homme, SD
Built 1984 Load: 19.1 t ADT: 88
42090 304th Street
FairOver: Snatch Creek
3.9E of Tyndall, Bon Homme, SD
Built 1988 Load: 19.1 t ADT: 66
29220 422nd Avenue
FairOver: Dawson Creek
2W of Scotland, Bon Homme, SD
Built 1982 Load: 19.1 t ADT: 60
The Colony Road
FairOver: Creek
2.9W & 5.9S of Tabor, Bon Homme, SD
Built 1984 Load: 19.1 t ADT: 50
29650 425th Avenue
FairOver: Prairie Creek
1E&0.5N of Jct Hwy 25/46, Bon Homme, SD
Built 1994 Load: 19.1 t ADT: 138
29490 427th Avenue
FairOver: Prairie Creek
1.9S & 3E of Scotland, Bon Homme, SD
Built 1988 Load: 19.1 t ADT: 60
270th Street
FairOver: Snake Creek
14W & 6N Platte, Charles Mix, SD
Built 1999 Load: 19.1 t ADT: 38
36590 274th Street
FairOver: Platte Creek
2.0N & 1.1W of Platte, Charles Mix, SD
Built 1979 Load: 19.1 t ADT: 48
37000 271st Street
FairOver: Platte Creek
5.1N & 3.0E of Platte, Charles Mix, SD
Built 1986 Load: 19.1 t ADT: 48
39360 294th Street
FairOver: Choteau Creek
3.0N & 1.4W of Wagner, Charles Mix, SD
Built 1986 Load: 19.1 t ADT: 48
29660 395th Avenue
FairOver: Creek
0.4N of Wagner, Charles Mix, SD
Built 1991 Load: 19.1 t ADT: 564
29640 396th Avenue
FairOver: Choteau Creek
0.6N & 1.0E of Wagner, Charles Mix, SD
Built 1986 Load: 19.1 t ADT: 48
39960 300th Street
FairOver: Choteau Creek
0.4W of Dante, Charles Mix, SD
Built 1977 Load: 19.1 t ADT: 48
40120 302nd Street
FairOver: Choteau Creek
2.0S & 1.2E of Dante, Charles Mix, SD
Built 1974 Load: 19.1 t ADT: 102
303rd Street
FairOver: Choteau Creek
3S & 1.25E of Dante, Charles Mix, SD
Built 1997 Load: 19.1 t ADT: 100
40310 307th Street
FairOver: Choteau Creek
7.0S & 3.1E of Dante, Charles Mix, SD
Built 1981 Load: 19.1 t ADT: 34
158 STREET
FairOver: CK
2.3 N 0.9 W FLORENCE, Codington, SD
Built 1928 Load: 19.1 t ADT: 73
BISON LANE
FairOver: FRENCH CK
11E 2S FAIRBURN, Custer, SD
Built 1974 Load: 19.1 t ADT: 12
CO RD 313 471ST AV
FairOver: PEG MUNKY RUN CK
7 W 0.7 N TOR, Deuel, SD
Built 1961 Load: 19.1 t ADT: 200
483 AVENUE
FairOver: COBB CK
5.5N ASTORIA, Deuel, SD
Built 1961 Load: 19.1 t ADT: 179
179 STREET
FairOver: LAUGHING WATER CK
MAIN ST OF GARY, Deuel, SD
Built 1959 Load: 19.1 t ADT: 362
38850 274 ST
FairOver: ANDES CK
1.0S & 0.5W OF CORSICA, Douglas, SD
Built 1991 Load: 19.1 t ADT: 30
38910 282 ST
FairOver: ANDES CK
1.5S,2.9W OF ARMOUR, Douglas, SD
Built 1987 Load: 19.1 t ADT: 10
26960 393 AVE
FairOver: CHOTEAU CK
2.4N,4.0E OF CORSICA, Douglas, SD
Built 1979 Load: 19.1 t ADT: 77
27080 394 AVE
FairOver: CHOTEAU CK
2.2N,5.0E OF CORSICA, Douglas, SD
Built 1983 Load: 19.1 t ADT: 77
28550 398 AVE
FairOver: CK
1.5S,3.0W OF DELMONT, Douglas, SD
Built 1984 Load: 19.1 t ADT: 45
28490 403 AVE
FairOver: CK
0.9S,1.0E OF DELMONT, Douglas, SD
Built 1972 Load: 19.1 t ADT: 25
Hudson Flat Road
FairOver: PLUM CK
9.6N&10.2E MILESVILL, Haakon, SD
Built 1973 Load: 19.1 t ADT: 28
Showing 701-750 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 |