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
IRR I029 N
FairOver: BURLINGTON NORTHERN RR
0.6 S US 12 INTERCH, Roberts, SD
Built 1979 Load: 45.7 t ADT: 3,340
US281
FairOver: SNAKE CK
5.8 N JCT US 212, Spink, SD
Built 1978 Load: 45.7 t ADT: 2,226
1ST AVE NE
FairOver: WILLOW CK
1ST AVE NE, Codington, SD
Built 2008 Load: 45.8 t ADT: 200
SD013
FairOver: SPRING CK
4.1 S BROOKINGS CO LINE, Moody, SD
Built 1963 Load: 45.8 t ADT: 1,135
SD037
FairOver: CK
0.2E & 0.8N SPRINGFIELD, Bon Homme, SD
Built 2000 Load: 45.9 t ADT: 726
SD079
FairOver: NORTH CANAL
4.5 N NEWELL & JCT 212 E, Butte, SD
Built 1962 Load: 45.9 t ADT: 786
244TH ST, HWY 102
FairOver: PIPESTONE CREEK
6N & 2.1W SHERMAN, Minnehaha, SD
Built 2005 Load: 46.0 t ADT: 301
SD044
FairOver: CK
11.4 E OF WINNER, Tripp, SD
Built 1971 Load: 46.0 t ADT: 568
SD053
FairOver: WHITE RV
MELLETTE CO LINE, Lyman, SD
Built 2001 Load: 46.1 t ADT: 60
US085
FairOver: NORTH BR MOREAU RV
10 N BUTTE CO LINE, Harding, SD
Built 1974 Load: 46.3 t ADT: 1,223
I029 S
FairOver: BNSF RR
0.6 N SD 44 INTERCH, Lincoln, SD
Built 2000 Load: 46.3 t ADT: 12,340
US016A
FairOver: BATTLE CK
2.7 S JCT US 16, Pennington, SD
Built 1968 Load: 46.3 t ADT: 3,638
167TH ST
FairOver: CREEK
2S 1.5W ASHTON, Spink, SD
Built 1997 Load: 46.3 t ADT: 55
460th Avenue
FairOver: Boswell Diversion Ditch
5.9S & 1E of Castlewood, Hamlin, SD
Built 1929 Load: 46.4 t ADT: 129
SD040
FairOver: BATTLE CK
2.2 E JCT US 16A, Pennington, SD
Built 1974 Load: 46.4 t ADT: 995
2500 WEST MAIN ST.
FairOver: BNSF RR
0.5S,0.5W VERMILLION, Clay, SD
Built 1996 Load: 46.5 t ADT: 700
SD079S
FairOver: BEAVER CK
2.7 N FALL RIVER CO LINE, Custer, SD
Built 2004 Load: 46.6 t ADT: 2,203
US012
FairOver: WHETSTONE RV DIV CHANNEL
0.6 E JCT SD 109, Grant, SD
Built 1955 Load: 46.6 t ADT: 3,824
142nd Street
FairOver: Moccasin Creek
0.2N & 2.8E of Warner, Brown, SD
Built 2001 Load: 46.7 t ADT: 255
S BROADWAY WTN
FairOver: BIG SIOUX RV
S. BROADWAY - WATERTOWN, Codington, SD
Built 1962 Load: 46.7 t ADT: 169
I090
FairOver: RC,P&E RR
ADJ TO BLACKHAWK INT, Meade, SD
Built 2008 Load: 46.7 t ADT: 21,020
10th Avenue
FairOver: HAY CK
10th Avenue, Butte, SD
Built 1961 Load: 46.8 t ADT: 300
SD324
FairOver: MEDARY CK OVERFLOW
0.4 E I 29 INTERCH, Brookings, SD
Built 1974 Load: 46.9 t ADT: 1,295
US016A
FairOver: GRACE COOLIDGE CK
0.2 W JCT SD 36, Custer, SD
Built 1987 Load: 46.9 t ADT: 1,335
158TH ST
FairOver: SOUTH FORK SNAKE CK
5S & 0.1E CRESBARD, Faulk, SD
Built 1988 Load: 46.9 t ADT: 55
I090
FairOver: SLIP UP CK
1 E I 229 INTERCH, Minnehaha, SD
Built 1993 Load: 46.9 t ADT: 19,640
OFFETT ST
FairOver: CK
2.5 W OF BOX ELDER, Pennington, SD
Built 1962 Load: 46.9 t ADT: 50
214TH STREET
FairOver: CK
2S & 2.6W BROOKINGS, Brookings, SD
Built 1970 Load: 47.2 t ADT: 63
WHITEWOOD VALLEYRD
FairOver: BELLE FOURCHE RV
EAST EDGE OF NISLAND, Butte, SD
Built 1980 Load: 47.2 t ADT: 55
IRR SD025
FairOver: CK
0.9 E MARSHALL CO LINE, Roberts, SD
Built 1960 Load: 47.2 t ADT: 514
SD027
FairOver: DRY RUN CK
0.3 E OF LANGFORD, Marshall, SD
Built 1980 Load: 47.4 t ADT: 727
IRR I029 S
FairOver: SOO LINE RR
0.5 N SD 127 INTERCH, Roberts, SD
Built 1976 Load: 47.4 t ADT: 2,665
IRR I029 N
FairOver: SOO LINE RR
0.5 N SD 127 INTERCH, Roberts, SD
Built 1976 Load: 47.4 t ADT: 2,665
SD1804
FairOver: OKOBOJO CK
5.2 N HUGHES CO LINE, Sully, SD
Built 1972 Load: 47.4 t ADT: 634
US018
FairOver: FALL RV
0.8 W JCT SD 79 N, Fall River, SD
Built 2010 Load: 47.6 t ADT: 4,764
42580 287 ST.
FairOver: LONETREE CK
1.0S & 0.2W OF OLIVET, Hutchinson, SD
Built 1989 Load: 47.6 t ADT: 25
I090 W
FairOver: BURLINGTON NORTHERN RR
0.9 E I 29 INTERCH, Minnehaha, SD
Built 1992 Load: 47.6 t ADT: 13,405
US018
FairOver: DRAW
3 S JCT US 18 & SD 89, Fall River, SD
Built 1982 Load: 47.7 t ADT: 2,290
SD042
FairOver: BIG SIOUX RV
5.3 E I 229 INTERCH, Minnehaha, SD
Built 1995 Load: 47.8 t ADT: 11,510
SD034
FairOver: FALSE BOTTOM CK
5.1 SE BUTTE CO LINE, Lawrence, SD
Built 1998 Load: 47.9 t ADT: 3,410
US014
FairOver: COTTONWOOD CK
0.7 E PENNINGTON CO LINE, Jackson, SD
Built 1955 Load: 48.0 t ADT: 970
PRIVATE DR/US16 F
FairOver: SPRING CK
0.5M S & 0.5M W HILL CITY, Pennington, SD
Built 1980 Load: 48.0 t ADT: 10
361ST AVE
FairOver: SOUTH FORK SNAKE CK
5.3N MIRANDA, Faulk, SD
Built 1995 Load: 48.1 t ADT: 39
SD047
FairOver: SOUTH MEDICINE CK
2.8 S JCT US 14, Hyde, SD
Built 1959 Load: 48.1 t ADT: 542
US014 E
FairOver: NORTH DEER CK OVERFLOW
4.1 E OF VOLGA, Brookings, SD
Built 1979 Load: 48.2 t ADT: 4,096
US016
FairOver: CK
0.2 E JCT US 385 S, Custer, SD
Built 1966 Load: 48.4 t ADT: 9,174
SD079S
FairOver: FRENCH CK
11.5 S JCT SD 36 W, Custer, SD
Built 2003 Load: 48.5 t ADT: 2,203
SD079N
FairOver: FRENCH CK
11.5 S JCT SD 36 W, Custer, SD
Built 2003 Load: 48.5 t ADT: 2,203
US014 W
FairOver: BIG SIOUX RV OVERFLOW
2.4 MI EAST OF VOLGA, Brookings, SD
Built 2001 Load: 48.6 t ADT: 4,096
ELM SPRINGS RD.
FairOver: ELK CK
4.3S & 1.2E ELM SPRG, Meade, SD
Built 1965 Load: 48.6 t ADT: 58
Showing 2,751-2,800 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.