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
SD027
FairOver: CK
4.2 S JCT SD 10, Marshall, SD
Built 1977 Load: 29.2 t ADT: 727
IRR SD013
FairOver: BIG SIOUX RV
2.0 N OF FLANDREAU, Moody, SD
Built 1964 Load: 29.2 t ADT: 1,135
CHERRY AVENUE
FairOver: RAPID CK
CHERRY & E ST JAMES - RC, Pennington, SD
Built 1974 Load: 29.2 t ADT: 400
SD020
FairOver: BIG SLOUGH CK
2.1 W JCT US 281, Spink, SD
Built 1955 Load: 29.2 t ADT: 975
SD053
FairOver: WILLOW CK
12.8 S JCT US 18, Tripp, SD
Built 1963 Load: 29.2 t ADT: 145
I029 S
FairOver: WILLOW CK
1.7 N US 212 INTERCH, Codington, SD
Built 1973 Load: 29.3 t ADT: 4,260
I029 N
FairOver: WILLOW CK
1.7 N US 212 INTERCH, Codington, SD
Built 1973 Load: 29.3 t ADT: 4,260
200TH ST
FairOver: REDSTONE CK
0.4 E OF BANCROFT, Kingsbury, SD
Built 1978 Load: 29.3 t ADT: 557
MURPHY ROAD
FairOver: MURPHY CK
6.6E HAYWARD, Pennington, SD
Built 1966 Load: 29.3 t ADT: 77
170TH Street
FairOver: Dove Creek
6S 5.5W ATHOL, Spink, SD
Built 1940 Load: 29.3 t ADT: 55
SD034
FairOver: HAY CK
4.2 W JCT US 85, Butte, SD
Built 1956 Load: 29.4 t ADT: 1,042
200TH ST
FairOver: SPIRIT LAKE OUTLET
7.3 MILES EAST OF BANCRFT, Kingsbury, SD
Built 1988 Load: 29.5 t ADT: 174
SD079
FairOver: NORTH WILLOW CK
4.9 S JCT SD 168, Butte, SD
Built 1968 Load: 29.6 t ADT: 660
CAMP CROOK RD
FairOver: CK
2.2N & 21.0W BUFFALO, Harding, SD
Built 1960 Load: 29.6 t ADT: 97
FAS 3214 270 AVE
FairOver: LANCE CK
1 NE OF WENDTE, Stanley, SD
Built 1972 Load: 29.6 t ADT: 85
IRR US018
FairOver: CHOTEAU CK
3.4 E OF US 281 JUNCTION, Charles Mix, SD
Built 1960 Load: 29.7 t ADT: 409
IRR SD020
FairOver: LAKE KAMPESKA OUTLET
1.3 SE JCT SD 139, Codington, SD
Built 1958 Load: 29.7 t ADT: 3,646
SD240
FairOver: BIG BUFFALO CK
1 S CACTUS FLAT, Jackson, SD
Built 1952 Load: 29.7 t ADT: 1,080
32ND STREET
FairOver: RAPID CK
0.1N 32ND ST & SD44 - RC, Pennington, SD
Built 1974 Load: 29.7 t ADT: 4,500
144th Street
FairOver: Moccasin Creek
1.8S & 0.7W of Warner, Brown, SD
Built 1989 Load: 29.8 t ADT: 98
US012
FairOver: N FORK WHETSTONE CK
0.6 W JCT SD 15, Grant, SD
Built 2013 Load: 29.8 t ADT: 2,317
333 AVENUE
FairOver: BULL CK
4.2N & 4W JCT 44&47, Gregory, SD
Built 1965 Load: 29.8 t ADT: 36
US018
FairOver: CREEK
0.1 E OF DOUGLAS CO LINE, Hutchinson, SD
Built 1961 Load: 29.8 t ADT: 738
466th Avenue
FairOver: Blind Creek
2.7N of Jct. SD Hwy 46, Lincoln, SD
Built 1964 Load: 29.8 t ADT: 252
I090 E
FairOver: RC,P&E RR
0.2 SE US 14A INTERCH, Meade, SD
Built 1963 Load: 29.8 t ADT: 10,470
NEMO RD.
FairOver: BOXELDER CK
11 S 0.6 W TILFORD, Meade, SD
Built 1974 Load: 29.8 t ADT: 500
SD063
FairOver: BLACK PIPE CK
1.8 E OF NORRIS, Mellette, SD
Built 1954 Load: 29.8 t ADT: 289
258TH ST, HWY 130
FairOver: DIVERSION DITCH
0.7W RENNER, Minnehaha, SD
Built 1966 Load: 29.8 t ADT: 2,082
HISEGA DRIVE
FairOver: RAPID CK
0.1S HISEGA LODGE, Pennington, SD
Built 1972 Load: 29.8 t ADT: 106
SD037
FairOver: CK
0.3 N JCT SD 50, Bon Homme, SD
Built 1959 Load: 29.9 t ADT: 1,327
SD037
FairOver: CROW CK DITCH
7.0 S JCT SD 10, Brown, SD
Built 1961 Load: 29.9 t ADT: 960
SD045
FairOver: CROW CK
2.2 N BRULE CO LINE, Buffalo, SD
Built 1960 Load: 29.9 t ADT: 971
SD071
FairOver: HAT CK
15 S OF HOT SPRINGS, Fall River, SD
Built 1975 Load: 29.9 t ADT: 239
SD158
FairOver: CK
0.2 W MINNESOTA LINE, Grant, SD
Built 1966 Load: 29.9 t ADT: 270
SD034
FairOver: PLUM CK
0.5 W STANLEY CO LINE, Haakon, SD
Built 1958 Load: 29.9 t ADT: 364
SD042
FairOver: GIDLE CK
1.2 E DAVISON CO LINE, Hanson, SD
Built 1958 Load: 29.9 t ADT: 474
NORRIS PEAK ROAD
FairOver: BOXELDER CK
1.1E 3.0N JOHNSON SD, Pennington, SD
Built 1972 Load: 29.9 t ADT: 471
SD044
FairOver: MO. RV (LK FRANCIS CASE)
GREGORY - CHARLES MIX CO, Charles Mix, SD
Built 1966 Load: 30.0 t ADT: 916
24510 420 AVENUE
FairOver: ROCK CK
1 E & 6.9 N FULTON, Hanson, SD
Built 1984 Load: 30.0 t ADT: 60
SD034
FairOver: EAST BR SMITH CK
6.8 W WESSINGTON SPRINGS, Jerauld, SD
Built 1952 Load: 30.0 t ADT: 1,179
268th Street
FairOver: Bull Creek
8.2W & 2S of Iona, Lyman, SD
Built 1964 Load: 30.0 t ADT: 10
10th Street
FairOver: Railroad Switchyard
east of Reid Street, Minnehaha, SD
Built 1930 Load: 30.0 t ADT: 12,500
SD075
FairOver: SOUTH FORK GRAND RV
7.9 N JCT SD 20, Perkins, SD
Built 1966 Load: 30.0 t ADT: 205
FAS 3214 270 AVE
FairOver: TOMAHAWK CK
JUST WEST OF WENDTE, Stanley, SD
Built 1967 Load: 30.0 t ADT: 71
SD048
FairOver: WEST UNION CK
2.5 W IOWA STATE LINE, Union, SD
Built 1960 Load: 30.0 t ADT: 1,134
IRR US012
FairOver: BURLINGTON NORTHERN RR
7.9 E PERKINS CO LINE, Corson, SD
Built 1936 Load: 30.1 t ADT: 436
SD022
FairOver: HIDEWOOD CK
0.6 E JCT SD 15, Deuel, SD
Built 1954 Load: 30.1 t ADT: 1,030
SD034
FairOver: EAST ELM CK
7.5 W OF UNION CENTER, Meade, SD
Built 1956 Load: 30.1 t ADT: 945
484TH AVE, HWY 109
FairOver: SPLIT ROCK CREEK
1W & 2.8S GARRETSON, Minnehaha, SD
Built 1974 Load: 30.1 t ADT: 448
SD037
FairOver: BR TIMBER CK
2.3 N JCT US 212, Spink, SD
Built 1957 Load: 30.1 t ADT: 446
Showing 2,001-2,050 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.