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
Belvidere Road
FairOver: BAD RV
18.1 E PHILIP, Haakon, SD
Built 1988 Load: 19.1 t ADT: 28
369TH AVE
FairOver: TURTLE CK
6.5N VAYLAND, Hand, SD
Built 1960 Load: 19.1 t ADT: 163
25170 415 AVENUE
FairOver: CK
4.0W & 0.3N OF FULTON SD, Hanson, SD
Built 1984 Load: 19.1 t ADT: 40
41550 258 STREET
FairOver: ENEMY CK
1.6 S & 5.5 W ALEX, Hanson, SD
Built 1975 Load: 19.1 t ADT: 20
26760 416 AVENUE
FairOver: TWELVE MILE CK
2.6 S & 5.0 E ETHAN, Hanson, SD
Built 1988 Load: 19.1 t ADT: 60
41790 246 ST.
FairOver: ROCK CK
6 N & 1.1 W FULTON, Hanson, SD
Built 1985 Load: 19.1 t ADT: 35
24480 421 AVENUE
FairOver: ROCK CK
2 E 7.2 N FULTON, Hanson, SD
Built 1976 Load: 19.1 t ADT: 207
42300 256 STREET
FairOver: PIERRE CK
1 N & 2 E ALEXANDRIA, Hanson, SD
Built 1988 Load: 19.1 t ADT: 60
42310 257 STREET
FairOver: PIERRE CK
2.1 EAST OF ALEXANDRIA, Hanson, SD
Built 1980 Load: 19.1 t ADT: 50
42910 259 ST.
FairOver: WOLF CK
2 N & 0.1 E EMERY, Hanson, SD
Built 2002 Load: 19.1 t ADT: 35
42970 253 STREET
FairOver: WOLF CK
3.7 E FARMER, Hanson, SD
Built 1982 Load: 19.1 t ADT: 30
42970 260 STREET
FairOver: WOLF CK
1.0 N & 0.7 E EMERY, Hanson, SD
Built 1996 Load: 19.1 t ADT: 25
40450 271 ST
FairOver: CK
5.5 W 1 S DIMOCK S.D, Hutchinson, SD
Built 1983 Load: 19.1 t ADT: 10
40930 269 ST.
FairOver: SOUTH FORK TWELVE MILE C
6N .7 W PARKSTON S.D, Hutchinson, SD
Built 1989 Load: 19.1 t ADT: 45
41120 289 ST.
FairOver: CK
1 S TRIPP S.D., Hutchinson, SD
Built 1915 Load: 19.1 t ADT: 45
41310 269 ST
FairOver: SOUTH FORK TWELVE MILE C
0.5 E DIMOCK S.D., Hutchinson, SD
Built 1989 Load: 19.1 t ADT: 45
41150 290 ST.
FairOver: CK
3 S & 0.5 E TRIPP, Hutchinson, SD
Built 1920 Load: 19.1 t ADT: 150
27108 412 AVE.
FairOver: SOUTH FORK TWELVE MILE C
1 E DIMOCK S.D., Hutchinson, SD
Built 1984 Load: 19.1 t ADT: 69
27710 412 AVE.
FairOver: NORTH BR DRY CK
1.1S,2.0E PARKSTON, Hutchinson, SD
Built 1976 Load: 19.1 t ADT: 17
26922 413 AVE.
FairOver: SOUTH FORK TWELVE MILE C
6.7N,3.0E PARKSTON, Hutchinson, SD
Built 1974 Load: 19.1 t ADT: 45
27050 413 AVE.
FairOver: COFFEE CK
5.5N,3.0E PARKSTON, Hutchinson, SD
Built 1992 Load: 19.1 t ADT: 45
41420 270 ST.
FairOver: S. FORK TWELVE MILE CK
3.4 MILES EAST OF DIMOCK, Hutchinson, SD
Built 1989 Load: 19.1 t ADT: 257
27630 415 AVE.
FairOver: NORTH BR DRY CK
4.5E & 0.3S PARKSTON, Hutchinson, SD
Built 1915 Load: 19.1 t ADT: 69
27810 417 AVE.
FairOver: SOUTH BR DRY CK
2.1S,7.0E PARKSTON, Hutchinson, SD
Built 1976 Load: 19.1 t ADT: 23
27100 418 AVE.
FairOver: TWELVE MILE CK
1.9W 2.2N MILLTOWN, Hutchinson, SD
Built 1992 Load: 19.1 t ADT: 27
41830 279 ST.
FairOver: DRY CK
3.0S,8.3E PARKSTON, Hutchinson, SD
Built 1976 Load: 19.1 t ADT: 25
41870 277 ST.
FairOver: DRY CK
7.7 E 1 S PARKSTON, Hutchinson, SD
Built 1982 Load: 19.1 t ADT: 69
28270 419 AVE.
FairOver: LONETREE CK
4.3 N & 8 E TRIPP, Hutchinson, SD
Built 1988 Load: 19.1 t ADT: 45
41980 268TH ST
FairOver: JAMES RV
10.5S&0.7WALEXANDRIA, Hutchinson, SD
Built 1978 Load: 19.1 t ADT: 69
42070 285 ST.
FairOver: LONETREE CK
5.3W & 1.0N OF OLIVET, Hutchinson, SD
Built 1986 Load: 19.1 t ADT: 50
42520 MAXWELL RD.
FairOver: SOUTH BR LONETREE CK
4S 0.8W OLIVET, Hutchinson, SD
Built 1972 Load: 19.1 t ADT: 180
28730 SW. RIVER RD
FairOver: LONETREE CK
1.3S,0.0 OF OLIVET, Hutchinson, SD
Built 1979 Load: 19.1 t ADT: 69
28870 CO. RD. 11
FairOver: CK
2.7S,1.5E OF OLIVET, Hutchinson, SD
Built 1993 Load: 19.1 t ADT: 95
29020 428 AVE.
FairOver: Dawson Creek
4.2S,2.2E OF OLIVET, Hutchinson, SD
Built 1984 Load: 19.1 t ADT: 175
27870 CO. RD. 11
FairOver: WOLF CK
9.3W & 0.7S OF FREEMAN, Hutchinson, SD
Built 1978 Load: 19.1 t ADT: 69
42990 287 ST.
FairOver: CK
1.0S,1.1W OF MENNO, Hutchinson, SD
Built 1980 Load: 19.1 t ADT: 25
43260 269 ST.
FairOver: WOLF CK
6N & 6.4W JCT 81&44, Hutchinson, SD
Built 1955 Load: 19.1 t ADT: 69
372 ST
FairOver: CK
7.5E of Clayton, Hutchinson, SD
Built 1990 Load: 19.1 t ADT: 25
365 AVENUE
FairOver: SMITH CK
7.5W & 0.5S CROW LAKE, Jerauld, SD
Built 1974 Load: 19.1 t ADT: 23
236 STREET
FairOver: SMITH CK
0.7W CROW LAKE, Jerauld, SD
Built 1975 Load: 19.1 t ADT: 42
232 AVENUE
FairOver: SMITH CK
0.5E & 4.5N CROW LAKE, Jerauld, SD
Built 1973 Load: 19.1 t ADT: 160
233 STREET
FairOver: SAND CK
2S 3.3W ALPENA, Jerauld, SD
Built 1976 Load: 19.1 t ADT: 42
390 AVENUE
FairOver: SAND CK
2.5W 2.3S ALPENA, Jerauld, SD
Built 1973 Load: 19.1 t ADT: 60
224 STREET
FairOver: SAND CK
3S ALPENA, Jerauld, SD
Built 1977 Load: 19.1 t ADT: 25
233 ST
FairOver: CK
3.6W MADISON, Lake, SD
Built 1956 Load: 19.1 t ADT: 400
Mill Creek Road
FairOver: BEAVER CK
7MI.W SPEARFISH, Lawrence, SD
Built 1975 Load: 19.1 t ADT: 13
UPPER REDWATER RD
FairOver: REDWATER RV
6 W & 4 N SPEARFISH, Lawrence, SD
Built 1981 Load: 19.1 t ADT: 150
CLEOPATRA ROAD
FairOver: SPEARFISH CK
6S AND 2W SPEARFISH, Lawrence, SD
Built 1977 Load: 19.1 t ADT: 100
RIMROCK LODGE ROAD
FairOver: SPEARFISH CK
5.0S AND 0.5W SPEARFISH, Lawrence, SD
Built 1977 Load: 19.1 t ADT: 100
WINTERVILLE ROAD
FairOver: SPEARFISH CK
0.5 S OF SPEARFISH, Lawrence, SD
Built 1981 Load: 19.1 t ADT: 69
Showing 751-800 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 |