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
27140 417 AVE.
PoorOver: SOUTH FORK TWELVE MILE C
6 E 3.6 N PARKSTON, Hutchinson, SD
Built 1983 Load: 19.1 t ADT: 45
28430 420 AVE.
PoorOver: LONETREE CK
4 W 1.7 N HYS 18 &25, Hutchinson, SD
Built 1984 Load: 19.1 t ADT: 45
28550 421 AVE.
PoorOver: CK
5 W & 0.5 N OLIVET, Hutchinson, SD
Built 1978 Load: 19.1 t ADT: 69
28450 423 AVE
PoorOver: LONETREE CK
1.5N,3.0W OF OLIVET, Hutchinson, SD
Built 1985 Load: 19.1 t ADT: 69
43290 288 ST.
PoorOver: CK
2 S & 1.9 E MENNO, Hutchinson, SD
Built 1930 Load: 19.1 t ADT: 25
CAMP COMFORT ROAD
PoorOver: SPEARFISH CK
1.5N SPEARFISH, Lawrence, SD
Built 1975 Load: 19.1 t ADT: 500
COUNTY RD 014B
PoorOver: MILLER CK
.2 W JCT US85S -SPEARFISH, Lawrence, SD
Built 1934 Load: 19.1 t ADT: 2,000
DOMINO PL.
PoorOver: ELK CK
0.3W & 1.7 N OF PIEDMONT, Meade, SD
Built 1980 Load: 19.1 t ADT: 30
ELMSPRINGS RD.
PoorOver: BULL CK
1.8W 4N ELM SPRINGS, Meade, SD
Built 1975 Load: 19.1 t ADT: 60
COUNTY HIGHWAY #7
PoorOver: COTTONWOOD CK
5W & 4.2N WHITE RV, Mellette, SD
Built 1982 Load: 19.1 t ADT: 9
HAYNES ROAD
PoorOver: LODGE POLE CK
4W 13.9S WHITE BUTTE, Perkins, SD
Built 1980 Load: 19.1 t ADT: 26
HIDDEN TIMBER ROAD
PoorOver: ANTELOPE CK
9 E 3.8 S MISSION, Todd, SD
Built 1951 Load: 19.1 t ADT: 128
27150 446 AVE
PoorOver: CK
1.5N & 1W MARION, Turner, SD
Built 1945 Load: 19.1 t ADT: 100
27490 462 AVE
PoorOver: LONG CK
2.1N & 1E CHANCELLOR, Turner, SD
Built 1945 Load: 19.1 t ADT: 65
39280 284 ST
PoorOver: BR CHOTEAU CK
8.2 W. OF DELMONT, Douglas, SD
Built 1925 Load: 19.3 t ADT: 330
250TH ST, HWY 114
PoorOver: SLIP-UP CREEK
4.2E BALTIC, Minnehaha, SD
Built 1956 Load: 19.3 t ADT: 965
FAIRPOINT RD.
PoorOver: CK
34.5E&17.7N STURGIS, Meade, SD
Built 1962 Load: 19.4 t ADT: 65
47400 302 ST.
PoorOver: WEST BRULE CK
4.8W & 1S ALCESTER, Union, SD
Built 1960 Load: 19.5 t ADT: 435
15th Street NE
PoorOver: Ravine Park Lake
1N & 0.3E of Huron, Beadle, SD
Built 1924 Load: 19.6 t ADT: 56
202ND STREET
PoorOver: BIG SIOUX RV
1.25N & 0.4W BRUCE, Brookings, SD
Built 1970 Load: 19.6 t ADT: 92
199TH STREET
PoorOver: BIG SIOUX RV
13N & 4.1W BROOKINGS, Brookings, SD
Built 1970 Load: 19.6 t ADT: 92
214TH STREET
PoorOver: CK
2S & 3.3W BROOKINGS, Brookings, SD
Built 1962 Load: 19.6 t ADT: 64
214TH STREET
PoorOver: CK
2S & 2.3W BROOKINGS, Brookings, SD
Built 1974 Load: 19.6 t ADT: 63
216TH STREET
PoorOver: CK
4S & 1.7W BROOKINGS, Brookings, SD
Built 1935 Load: 19.6 t ADT: 597
WESTERN AVE.
PoorOver: CK
WESTERN AVE - BROOKINGS, Brookings, SD
Built 1932 Load: 19.6 t ADT: 1,356
207TH STREET
PoorOver: CK
4N & 1.8W BUSHNELL, Brookings, SD
Built 1974 Load: 19.6 t ADT: 75
477TH AVENUE
PoorOver: MEDARY CK
1E & 0.6S AURORA, Brookings, SD
Built 1968 Load: 19.6 t ADT: 92
482ND AVENUE
PoorOver: CK
7.1N & 4W ELKTON, Brookings, SD
Built 1973 Load: 19.6 t ADT: 137
482ND AVENUE
PoorOver: CK
4W & 2.9N ELKTON, Brookings, SD
Built 1950 Load: 19.6 t ADT: 89
220TH STREET
PoorOver: CK
3S & 0.9W ELKTON, Brookings, SD
Built 1941 Load: 19.6 t ADT: 92
487TH AVENUE
PoorOver: CK
1E & 0.5N OF ELKTON, Brookings, SD
Built 1993 Load: 19.6 t ADT: 92
45530 306 STREET
PoorOver: CK
4S & 0.4E WAKONDA, Clay, SD
Built 1971 Load: 19.6 t ADT: 147
46320 306 ST.
PoorOver: VERMILLION RV
1.8W HUB CITY, Clay, SD
Built 1970 Load: 19.6 t ADT: 150
396TH AVENUE
PoorOver: ENEMY CK
4.6S & 1W MT VERNON, Davison, SD
Built 1967 Load: 19.6 t ADT: 64
257TH ST.
PoorOver: ENEMY CK
3 S & 12.5W MITCHELL, Davison, SD
Built 1920 Load: 19.6 t ADT: 64
399TH AVENUE
PoorOver: NORTH BR TWELVE MILE CK
12 W & 0.4 N ETHAN, Davison, SD
Built 1972 Load: 19.6 t ADT: 71
403RD AVENUE
PoorOver: DRY RUN CK
1.8 N & 2.0 W LOOMIS, Davison, SD
Built 1945 Load: 19.6 t ADT: 64
403RD AVENUE
PoorOver: FIRESTEEL CK
2.0W 1.5S LOOMIS, Davison, SD
Built 1910 Load: 19.6 t ADT: 390
259TH STREET
PoorOver: ENEMY CK
5 S & 5.8 W MITCHELL, Davison, SD
Built 1970 Load: 19.6 t ADT: 64
260TH STREET
PoorOver: ENEMY CK
5.0N 7.2W ETHAN, Davison, SD
Built 1917 Load: 19.6 t ADT: 25
404TH AVENUE
PoorOver: ENEMY CK
5 W & 5.8 S MITCHELL, Davison, SD
Built 1935 Load: 19.6 t ADT: 15
409TH AVE
PoorOver: NORTH BR TWELVE MILE CK
2.3 N & 2 W ETHAN, Davison, SD
Built 1945 Load: 19.6 t ADT: 64
345TH AVE
PoorOver: CK
3.7W & 9.4S REE HEIGHTS, Hand, SD
Built 1930 Load: 19.6 t ADT: 43
GREEN VALLEY RD
PoorOver: CK
5.8S & 1.7W REE HEIGHTS, Hand, SD
Built 1920 Load: 19.6 t ADT: 43
198TH ST
PoorOver: CK
REE HEIGHTS, Hand, SD
Built 1930 Load: 19.6 t ADT: 30
202ND ST
PoorOver: CK
4S & 2.9W MILLER, Hand, SD
Built 1928 Load: 19.6 t ADT: 10
193RD ST
PoorOver: CK
4N & 0.9W MILLER, Hand, SD
Built 1930 Load: 19.6 t ADT: 43
W. 2ND ST
PoorOver: REE CK
MILLER, Hand, SD
Built 1914 Load: 19.6 t ADT: 10
258TH ST, HWY 130
PoorOver: WILLOW CK
5.6W RENNER, Minnehaha, SD
Built 1979 Load: 19.6 t ADT: 878
LAMESA DR, HWY 137
PoorOver: TRIB TO SKUNK CK
0.4S & 1E ELLIS, Minnehaha, SD
Built 1982 Load: 19.6 t ADT: 1,492
Showing 5,601-5,650 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.