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
I029 S
FairOver: BACHELOR CK
3.8 S SD 34 INTERCH, Moody, SD
Built 1964 Load: 34.5 t ADT: 9,835
WHITE BUTTE ROAD
FairOver: SOUTH FORK GRAND RV
0.4E 5.5 N BISON, Perkins, SD
Built 2012 Load: 34.5 t ADT: 155
OLSON CUTOFF ROAD
FairOver: BELLE FOURCHE RV
1N & 4E BELLE FOURCH, Butte, SD
Built 1995 Load: 34.6 t ADT: 47
US018
FairOver: SOUTH FORK BLACKTAIL CK
6 E JCT US 385 S, Fall River, SD
Built 1952 Load: 34.6 t ADT: 676
SD044
FairOver: DIXON CK
1.9 W JCT SD 47, Gregory, SD
Built 1971 Load: 34.6 t ADT: 568
SD079
FairOver: COTTONWOOD CK
3.3 S BUTTE CO LINE, Meade, SD
Built 1954 Load: 34.6 t ADT: 2,199
SD044
FairOver: SAND CK
1.6 E JCT US 18, Tripp, SD
Built 1969 Load: 34.6 t ADT: 1,236
27210 447 AVE
FairOver: WEST FORK VERMILLION RV
0.9 N MARION, Turner, SD
Built 2017 Load: 34.6 t ADT: 653
AVANCE RD.
FairOver: CK
6S & 9.9W FAITH, Meade, SD
Built 1962 Load: 34.7 t ADT: 40
SHEILDS RD
FairOver: RAPID CK
0.5E 1.3S JOHNSON SD, Pennington, SD
Built 1972 Load: 34.7 t ADT: 38
SD037
FairOver: TIMBER CK
1.1 S BROWN CO LINE, Spink, SD
Built 1955 Load: 34.7 t ADT: 960
I029
FairOver: CK
3.3 S US 14 INTERCH, Brookings, SD
Built 1966 Load: 34.8 t ADT: 12,240
117th Street
FairOver: Sand Lake
5.5N & 0.3E of Columbia, Brown, SD
Built 1971 Load: 34.8 t ADT: 41
SD079N
FairOver: BEAVER CK
2.7 N FALL RIVER CO LINE, Custer, SD
Built 1957 Load: 34.8 t ADT: 2,203
US014
FairOver: WILBURN CK
6.4 E OF PHILIP, Haakon, SD
Built 1955 Load: 34.8 t ADT: 725
CANYON LAKE DR
FairOver: RAPID CK
.2W CANYON LK&MT VIEW -RC, Pennington, SD
Built 2003 Load: 34.8 t ADT: 8,885
SD028
FairOver: JAMES RV
2.6 W JCT SD 37, Spink, SD
Built 2013 Load: 34.8 t ADT: 363
390 AVE
FairOver: FIRESTEEL CK
3W 1.2N STORLA, Aurora, SD
Built 1999 Load: 34.9 t ADT: 33
US085
FairOver: SHEEP CK
3.6 N OF BUFFALO, Harding, SD
Built 1963 Load: 34.9 t ADT: 1,312
SD027
FairOver: SPAIN DITCH
6.3 S JCT SD 10, Marshall, SD
Built 1977 Load: 34.9 t ADT: 727
SD079
FairOver: SOUTH WILLOW CK
10 N NEWELL & JCT 212 E, Butte, SD
Built 1962 Load: 35.0 t ADT: 786
SD079
FairOver: DRY CK
3.7 N NEWELL & JCT 212 E, Butte, SD
Built 1962 Load: 35.0 t ADT: 786
42840 282 STR.
FairOver: JAMES RV
4N 2.4E OLIVET, Hutchinson, SD
Built 1966 Load: 35.0 t ADT: 106
US212
FairOver: JAMES RV
1.7 W OF FRANKFORT, Spink, SD
Built 1968 Load: 35.0 t ADT: 1,651
Shore Drive
FairOver: GAVINS POINT SPILLWAY
5 Miles West of Yankton, Yankton, SD
Built 1956 Load: 35.0 t ADT: 1,029
111th Street
FairOver: Elm River
3.7S & 1.5W of Frederick, Brown, SD
Built 1988 Load: 35.1 t ADT: 98
30280 458 AVE
FairOver: NORWEGIAN GULCH
5.8S & 6.0E IRENE, Clay, SD
Built 2006 Load: 35.1 t ADT: 31
SD040
FairOver: BATTLE CK
0.1 E OF HAYWARD, Pennington, SD
Built 1974 Load: 35.1 t ADT: 995
I090 W
FairOver: RCP&E RR
0.5 W SD 240 INTERCH, Pennington, SD
Built 1968 Load: 35.1 t ADT: 3,895
I090 E
FairOver: RCP&E RR
0.5 W SD 240 INTERCH, Pennington, SD
Built 1968 Load: 35.1 t ADT: 3,895
180th Street
FairOver: Stray Horse Creek
3.8E & 3N of Castlewood, Hamlin, SD
Built 1990 Load: 35.2 t ADT: 118
IRR US083
FairOver: ANTELOPE CK
0.1 S JCT US 18, Todd, SD
Built 1981 Load: 35.2 t ADT: 2,517
IRR SD050
FairOver: WOLF CK
6.1 S JCT SD 34, Buffalo, SD
Built 1954 Load: 35.3 t ADT: 954
SD034
FairOver: WEST PLUM CK
7.1 E JCT SD 73 S, Haakon, SD
Built 1958 Load: 35.3 t ADT: 438
SD028
FairOver: LAKE POINSETT INLET
3.3 E JCT US 81, Hamlin, SD
Built 1951 Load: 35.3 t ADT: 998
41270 271 ST.
FairOver: COFFEE CK
1 S 1.7 E DIMOCK SD, Hutchinson, SD
Built 2009 Load: 35.3 t ADT: 45
I090 E
FairOver: WHITE WILLOW CK
1.3 W KADOKA INTERCH, Jackson, SD
Built 1967 Load: 35.3 t ADT: 3,360
10th Street
FairOver: Big Sioux River
west of Reid Street, Minnehaha, SD
Built 1934 Load: 35.3 t ADT: 25,000
US016 EF
FairOver: SPRING CK
0.5 E JCT US 385, Pennington, SD
Built 1985 Load: 35.3 t ADT: 60
STATE HIGHWAY 514
FairOver: OAHE DAM DISCHARGE CHAN.
5 Miles No. of Ft. Pierre, Stanley, SD
Built 1957 Load: 35.3 t ADT: 300
SD048
FairOver: BRULE CK
3.5 E I 29 INTERCH, Union, SD
Built 1957 Load: 35.3 t ADT: 742
164 STREET
FairOver: BIG SIOUX RV
8N 3.2 W WATERTOWN, Codington, SD
Built 1966 Load: 35.4 t ADT: 397
I090 W
FairOver: WHITE WILLOW CK
1.3 W KADOKA INTERCH, Jackson, SD
Built 1967 Load: 35.4 t ADT: 3,360
I090 E
FairOver: R&W RR
2.6 E OKATON INTERCH, Jones, SD
Built 1969 Load: 35.4 t ADT: 3,360
SD040
FairOver: BATTLE CK
0.3 E OF HAYWARD, Pennington, SD
Built 1974 Load: 35.4 t ADT: 995
SD044
FairOver: PLATTE CK
2.4 W JCT SD 45 N, Charles Mix, SD
Built 1964 Load: 35.5 t ADT: 2,262
42818 MAXWELL RD.
FairOver: JAMES RV
3.8S 2.1E OLIVET, Hutchinson, SD
Built 1971 Load: 35.5 t ADT: 148
SD040
FairOver: IRON CK
5.3 E JCT US 16A, Pennington, SD
Built 1974 Load: 35.5 t ADT: 995
3rd Street
FairOver: Turtle Creek
3rd Street West Redfield, Spink, SD
Built 1993 Load: 35.5 t ADT: 191
396TH AVE
FairOver: CREEK
7.1S FRANKFORT, Spink, SD
Built 1972 Load: 35.5 t ADT: 40
Showing 2,351-2,400 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.