Total Bridges
5,905
Public highway bridges in South Dakota
State profile · Above median Poor share
South Dakota bridge safety
Condition ratings, load ratings, and Poor-condition data for every public highway bridge in South Dakota, based on the FHWA National Bridge Inventory.
- 5,905
- Public bridges
- 31.9%
- Good condition
- 16.2%
- Poor condition
Data updated May 2026
Good Condition
31.9%
1,885 bridges rated 7-9
-18.1pp vs 50% benchmark
Poor Condition
16.2%
959 bridges whose lowest applicable component is rated 0-4
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 - Poor-condition share 54.1%
National avg
Lower is better. Bar maxes at 30% (worst-state ceiling). National average sits at 7.0%.
Condition Distribution
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 by Poor-condition share (lower share = better)
States are ranked by the share of bridges whose lowest applicable component rating is 4 or below. This describes recorded condition; it does not measure funding effectiveness or live crossing safety. States here sit immediately above and below South Dakota on the same metric.
GU
Guam
15.25% top marginal rate
WV
West Virginia
16.02% top marginal rate
SD
South Dakota
16.24% top marginal rate
IA
Iowa
20.01% top marginal rate
VI
Virgin Islands
29.17% top marginal rate
Bridges Needing Most Attention in South Dakota
Six lowest-condition bridges in South Dakota, ranked by the portal's composite display score. Inspection intervals are risk-based under current NBIS rules.
483 AVENUE
PoorOver: WHETSTONE RV
4.8E & 3.2N MILBANK, Grant, SD
Built 1962 Load: 0.9 t ADT: 25
202ND ST.
PoorOver: BEAR BUTTE CK
5.3E BEAR BUTTE, Meade, SD
Built 2000 Load: 0.9 t ADT: 50
45980 303 ST.
PoorOver: VERMILLION RV
6S & 7.8E IRENE, Clay, SD
Built 1909 Load: 1.8 t ADT: 15
460th Avenue
PoorOver: Big Coulee Creek
4S & 2W of Peever, Roberts, SD
Built 1950 Load: 2.2 t ADT: 22
197TH ST
PoorOver: TURTLE CK
1N & 1E ST LAWRENCE, Hand, SD
Built 1925 Load: 2.5 t ADT: 25
242 ST
PoorOver: CK
1.8E 11.0N PLANKINTON, Aurora, SD
Built 1917 Load: 2.7 t ADT: 101
All Bridges in South Dakota
182ND ST
FairOver: James River
9 S 0.1 E FRANKFORT, Spink, SD
Built 1975 Load: 37.5 t ADT: 40
US018
FairOver: BIG HOLLOW CK
3.9 E JCT US 183, Tripp, SD
Built 1965 Load: 37.5 t ADT: 1,613
US014
FairOver: MIDDLE PEARL CK
2.7 W OF IROQUOIS, Beadle, SD
Built 1965 Load: 37.6 t ADT: 1,883
Morristown Road
FairOver: Grand River
18S & 1E MORRISTOWN, Corson, SD
Built 1981 Load: 37.6 t ADT: 30
SD071
FairOver: ALABAUGH CANYON
8.1 S OF HOT SPRINGS, Fall River, SD
Built 1998 Load: 37.6 t ADT: 383
WHITEWOOD RD
FairOver: BEAR BUTTE CK
WEST EDGE OF STURGIS, Meade, SD
Built 2006 Load: 37.6 t ADT: 875
463rd Avenue
FairOver: Little Minnesota River
5E & 0.5S of Sisseton, Roberts, SD
Built 1986 Load: 37.6 t ADT: 47
I090 E
FairOver: PLATTE CK
3.2 W WHITE LAKE INTERCH, Aurora, SD
Built 1964 Load: 37.7 t ADT: 4,390
SD046
FairOver: EMANUEL CK
3.1 E JCT SD 37, Bon Homme, SD
Built 1966 Load: 37.7 t ADT: 522
WALNUT STREET
FairOver: WHITEWOOD CK
CHARLES ST - DEADWOOD, Lawrence, SD
Built 1994 Load: 37.7 t ADT: 30
SD042
FairOver: WOLF CK
2.9 W JCT SD 262, McCook, SD
Built 1957 Load: 37.7 t ADT: 356
IRR BIA RTE 41
FairOver: WHITE RIVER
19.3 KM NW OF OGLALA, Oglala Lakota, SD
Built 1976 Load: 37.7 t ADT: 624
CAMBELL ST
FairOver: RAPID CK
0.6 S JCT SD 44, Pennington, SD
Built 1967 Load: 37.7 t ADT: 21,415
SD026
FairOver: TURTLE CK
4.3 W JCT US 281, Spink, SD
Built 1984 Load: 37.7 t ADT: 578
I090 W
FairOver: PLATTE CK
3.2 W WHITE LAKE INTERCH, Aurora, SD
Built 1964 Load: 37.8 t ADT: 4,390
395th Avenue
FairOver: Elm River
2S & 1.1W of Columbia, Brown, SD
Built 1987 Load: 37.8 t ADT: 98
US085
FairOver: JONES CK
8.9 NE OF BUFFALO, Harding, SD
Built 1960 Load: 37.8 t ADT: 1,312
US085
FairOver: BIG NASTY CK
9.7 S NORTH DAKOTA LINE, Harding, SD
Built 1960 Load: 37.8 t ADT: 1,100
SD011
FairOver: NINE MILE CK
6 S MINNEHAHA CO LINE, Lincoln, SD
Built 1963 Load: 37.8 t ADT: 2,938
IRR US018
FairOver: WHITE CLAY CK
11.2 NW OF PINE RIDGE, Oglala Lakota, SD
Built 2011 Load: 37.8 t ADT: 2,241
SD050
FairOver: VERMILLION RV
1 NW OF VERMILLION, Clay, SD
Built 1981 Load: 37.9 t ADT: 4,888
SD020
FairOver: CK
2.6 W JCT SD 15, Grant, SD
Built 1956 Load: 37.9 t ADT: 739
US016
FairOver: SPRING CK
0.2 E JCT US 385, Pennington, SD
Built 1985 Load: 37.9 t ADT: 6,612
116th Street
FairOver: Little Minnesota River
1E & 3N of Sisseton, Roberts, SD
Built 1988 Load: 37.9 t ADT: 68
IRR SD010
FairOver: LITTLE MINNESOTA RV
1.7 E JCT I 29, Roberts, SD
Built 2006 Load: 37.9 t ADT: 1,588
470th Avenue
FairOver: N Fork Whetstone River
3N & 2W of Corona, Roberts, SD
Built 1988 Load: 37.9 t ADT: 55
SD011
FairOver: WEST UNION CK
12.4 S JCT SD 46, Union, SD
Built 1969 Load: 37.9 t ADT: 359
US014
FairOver: DEER CK
1.9 E I 29 INTERCH, Brookings, SD
Built 1973 Load: 38.0 t ADT: 4,885
US014
FairOver: PEARL CK
5.8 E JCT SD 45, Hand, SD
Built 1996 Load: 38.0 t ADT: 1,373
SD050
FairOver: PEASE CK
4.3 S OF GEDDES, Charles Mix, SD
Built 1954 Load: 38.1 t ADT: 550
145 STREET
FairOver: NORTH FORK WHETSTONE RV
0.5S & 6.5W BIG STONE, Grant, SD
Built 1966 Load: 38.1 t ADT: 370
455 AVE
FairOver: NORTH BR BUFFALO CK
2.0W & 0.5S FRANKLIN, Lake, SD
Built 1977 Load: 38.1 t ADT: 60
I090 E
FairOver: CK
2.6 E SD 38 INTERCH, Minnehaha, SD
Built 1961 Load: 38.1 t ADT: 8,550
Falls Park Drive
FairOver: Big Sioux River
west of Weber Avenue, Minnehaha, SD
Built 1995 Load: 38.1 t ADT: 8,260
SD044
FairOver: RAPID CK
4.2 SW JCT SD 231, Pennington, SD
Built 1967 Load: 38.1 t ADT: 3,690
US016
FairOver: SPRING CK
200' EAST NEWTON ST, Pennington, SD
Built 1995 Load: 38.2 t ADT: 6,642
SD025
FairOver: ROCK CK
7.5 S JCT SD 34, Miner, SD
Built 1976 Load: 38.3 t ADT: 484
I090 W
FairOver: POLO CK
1 E US 85 S INTERCH, Lawrence, SD
Built 1971 Load: 38.4 t ADT: 7,465
Russell Street EBL
FairOver: Big Sioux River
west of Kiwanis Avenue, Minnehaha, SD
Built 2013 Load: 38.4 t ADT: 19,500
Otumwa Road
FairOver: NOWLIN CK
7 S OTTUMWA, Haakon, SD
Built 1965 Load: 38.5 t ADT: 42
I090 WF
FairOver: SPEARFISH CK
0.4 W US 85 INTERCH, Lawrence, SD
Built 1974 Load: 38.5 t ADT: 50
I090 E
FairOver: POLO CK
1 E US 85 S INTERCH, Lawrence, SD
Built 1971 Load: 38.5 t ADT: 7,465
44910 273 ST.
FairOver: WEST FORK VERMILLION RV
2.1E MARION, Turner, SD
Built 1990 Load: 38.6 t ADT: 97
SD019A
FairOver: CK
2.7 E JCT SD 19, Turner, SD
Built 1968 Load: 38.6 t ADT: 320
SD019A
FairOver: TURKEY RIDGE CK
4.6 E JCT SD 19, Turner, SD
Built 1968 Load: 38.6 t ADT: 320
I029 S
FairOver: PEG MUNKY RUN CK
0.9 N SD 28 INTERCH, Deuel, SD
Built 1973 Load: 38.7 t ADT: 4,290
I090 W
FairOver: WOLF CK
0.9 W MCCOOK CO LINE, Hanson, SD
Built 1964 Load: 38.7 t ADT: 6,255
I090 E
FairOver: WOLF CK
0.9 W MCCOOK CO LINE, Hanson, SD
Built 1964 Load: 38.7 t ADT: 6,255
SD044
FairOver: NORTH BR DRY CK
5.6 E JCT SD 37, Hutchinson, SD
Built 1964 Load: 38.7 t ADT: 1,592
SD044
FairOver: NORTH BR DRY CK
6.5 E JCT SD 37, Hutchinson, SD
Built 1964 Load: 38.7 t ADT: 1,592
Showing 2,501-2,550 of 5,905 bridges
Related
Data sourced from the FHWA National Bridge Inventory (NBI), latest released cycle. See our methodology for details. Retrieved and formatted by PlainBridges.
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). Poor condition is an inspection-record category, not a closure or unsafe-to-cross designation. Consult the bridge owner for current status.
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.
Every figure on PlainBridge is rendered directly from federal source data, no number is typed in by an editor. This page draws directly on federal source data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.