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
Benson Road
FairOver: Trib to Skunk Creek
0.4E of Marion Road, Minnehaha, SD
Built 2013 Load: 60.6 t ADT: 3,800
IRR SD040
FairOver: CHEYENNE RV
23 SE HERMOSA, Custer, SD
Built 1994 Load: 60.8 t
280 STREET
FairOver: DOG EAR CK
1.2W & 2S WINNER, Tripp, SD
Built 1947 Load: 60.9 t ADT: 49
48060 306 STR.
FairOver: EAST UNION CK
4S & 1.6E ALCESTER, Union, SD
Built 1986 Load: 61.0 t ADT: 45
US083
FairOver: NORTH FORK MEDICINE CK
2.0 N JCT SD 248, Lyman, SD
Built 2003 Load: 61.1 t ADT: 2,284
SD079
FairOver: NORTH FORK WILLOW CK
2.9 S JCT SD 168, Butte, SD
Built 1968 Load: 61.4 t ADT: 660
SD036
FairOver: GRACE COOLIDGE CK
0.7 E JCT US 16A, Custer, SD
Built 1989 Load: 61.7 t ADT: 730
SD044
FairOver: CK
10.9 E OF WINNER, Tripp, SD
Built 1971 Load: 61.7 t ADT: 568
IRR I029
FairOver: BIG SPRING CK
1.2 S PEEVER INTERCH, Roberts, SD
Built 1978 Load: 62.1 t ADT: 5,340
47110 309 STR.
FairOver: BRULE CK
11S & 0.1E BERESFORD, Union, SD
Built 1989 Load: 62.1 t ADT: 25
SD047
FairOver: CK
5.6 N JCT US 18, Gregory, SD
Built 1957 Load: 62.2 t ADT: 546
SD044
FairOver: CK
2.6 SE OF FARMINGDALE, Pennington, SD
Built 1964 Load: 62.5 t ADT: 1,463
US012
FairOver: SOUTH FORK WHETSTONE RV
6.8 W JCT SD 15, Grant, SD
Built 1997 Load: 62.6 t ADT: 1,722
US083
FairOver: CK
7.7 N JCT SD 248, Lyman, SD
Built 1960 Load: 62.7 t ADT: 2,284
US014 B
FairOver: HILGERS GULCH
0.5 E JCT US 14 & 83, Hughes, SD
Built 1969 Load: 63.0 t ADT: 14,036
SD123
FairOver: CK
1.9 S ROBERTS CO LINE, Grant, SD
Built 1988 Load: 63.2 t ADT: 276
US183
FairOver: DRY RUN CK
1.0 N JCT US 18, Tripp, SD
Built 2001 Load: 63.5 t ADT: 1,075
US281
FairOver: BNSF RAILROAD
0.2N JCT US12, Brown, SD
Built 2001 Load: 63.9 t ADT: 4,559
SD044
FairOver: ELCE CK
2.1 E JCT SD 19, Turner, SD
Built 1968 Load: 63.9 t ADT: 1,034
US014
FairOver: REE CK
0.2 W JCT SD 45, Hand, SD
Built 1987 Load: 64.3 t ADT: 2,243
126th Street
FairOver: Foot Creek
7N & 7.2W of Aberdeen, Brown, SD
Built 2007 Load: 64.4 t ADT: 5
I090 W
FairOver: BULL CK
3.3 E WASTA INTERCH, Pennington, SD
Built 1964 Load: 64.6 t ADT: 4,000
I090 E
FairOver: BULL CK
3.3 E WASTA INTERCH, Pennington, SD
Built 1964 Load: 64.6 t ADT: 4,000
48080 308 STR.
FairOver: EAST UNION CK
6.5S & 1.8E ALCESTER, Union, SD
Built 1996 Load: 64.8 t ADT: 35
264th Street
FairOver: Wolf Creek
1N & 2.3W of Bridgewater, McCook, SD
Built 1980 Load: 64.9 t ADT: 30
SD040
FairOver: BATTLE CK
1.0 E JCT US 16A, Pennington, SD
Built 1974 Load: 65.0 t ADT: 1,110
OFFETT ST
FairOver: CK
2.1 E ELK VALE RD - BOX E, Pennington, SD
Built 1963 Load: 65.3 t ADT: 50
SD026
FairOver: TURTLE CK OVERFLOW
4.6 W JCT US 281, Spink, SD
Built 1989 Load: 65.4 t ADT: 578
SD027
FairOver: ANTELOPE CK
1.2 S MARSHALL CO LINE, Day, SD
Built 1970 Load: 65.8 t ADT: 518
SD038
FairOver: JOHNSON CK
6.1 E DAVISON CO LINE, Hanson, SD
Built 1991 Load: 66.2 t ADT: 2,211
SD248
FairOver: BR BIG BUFFALO CK
2.1 E OF CACTUS FLATS, Jackson, SD
Built 1956 Load: 66.2 t ADT: 104
SD037
FairOver: ENEMY CK
3.6 S I 90 INTERCH, Davison, SD
Built 1946 Load: 66.4 t ADT: 3,929
COUNTY HIGHWAY #11
FairOver: CK
9.9N & 3.2E WHITE RV, Mellette, SD
Built 1962 Load: 66.5 t ADT: 40
US014
FairOver: JACK DAILY CK
1.6 W OF MIDLAND, Haakon, SD
Built 1981 Load: 67.4 t ADT: 678
I090
FairOver: CK
1 E LAWRENCE CO LINE, Meade, SD
Built 1963 Load: 67.5 t ADT: 10,290
SD045
FairOver: CK
3.2 S JCT SD 26 E, Hand, SD
Built 2002 Load: 67.8 t ADT: 954
417th Avenue
FairOver: Pearl Creek
12.5N & 1W of Iroquois, Beadle, SD
Built 2009 Load: 67.9 t ADT: 56
US212
FairOver: DRY RUN CK
7.0 E JCT SD 45 S, Faulk, SD
Built 2008 Load: 68.0 t ADT: 689
31180 476TH AVE
FairOver: CK
3E & 1.2N SPINK, Union, SD
Built 1993 Load: 68.7 t ADT: 50
NEMO RD
FairOver: BOXELDER CK
10.3W 3.8N RAPID CITY, Pennington, SD
Built 1972 Load: 68.9 t ADT: 974
US385
FairOver: FALL RV
0.8 N JCT US 18 W, Fall River, SD
Built 1982 Load: 69.5 t ADT: 4,070
SD045
FairOver: LITTLE TURTLE CK
5 N JCT US 14, Hand, SD
Built 2002 Load: 69.9 t ADT: 954
US016
FairOver: SPRING CK
2.4 N OF CUSTER CO LINE, Pennington, SD
Built 1996 Load: 70.9 t ADT: 7,034
US014
FairOver: BUZZARD CK
13.1 E OF PHILIP, Haakon, SD
Built 1994 Load: 71.1 t ADT: 725
46320 308 ST
FairOver: VERMILLION RV OVERFLOW
1.7S & 1.8W OF HUB CITY, Clay, SD
Built 1998 Load: 71.2 t ADT: 25
STATE PARK RD
FairOver: RANDALL CK
1.0W & 2.0S PICKSTOWN, Gregory, SD
Built 2020 Load: 71.7 t ADT: 50
US016
FairOver: SPRING CK
1.4 N CUSTER CO LINE, Pennington, SD
Built 1998 Load: 71.8 t ADT: 7,034
US016
FairOver: SPRING CK
1.3 W JCT US 385, Pennington, SD
Built 1986 Load: 71.9 t ADT: 6,231
SD034
FairOver: HAY CK
3.9 W OF UNION CENTER, Meade, SD
Built 1973 Load: 72.0 t ADT: 945
US018
FairOver: CK
0.1 W JCT SD 53, Tripp, SD
Built 1965 Load: 72.1 t ADT: 1,053
Showing 2,901-2,950 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.