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
SD011 SF
GoodOver: EAST BRULE CK
1.0 S JCT SD 46, Union, SD
Built 1984 Load: 46.5 t ADT: 96
IRR SD044
GoodOver: WHITE RV
2.2 E 1.7 S OF INTERIOR, Jackson, SD
Built 1996 Load: 46.7 t ADT: 571
FDR 181
GoodOver: CASTLE CREEK
T 1 N R 3 E SEC 1, Meade, SD
Built 1957 Load: 46.7 t ADT: 25
WESTERN AVE.
GoodOver: SIX MILE CK
WESTERN AVE - BROOKINGS, Brookings, SD
Built 1988 Load: 46.9 t ADT: 1,356
30370 461 AVE
GoodOver: VERMILLION RV
6.7S & 9E IRENE, Clay, SD
Built 2001 Load: 46.9 t ADT: 50
240 ST
GoodOver: ROCK CK
7.0S & 6.6W HOWARD, Miner, SD
Built 2005 Load: 46.9 t ADT: 18
SD130
GoodOver: BURLINGTON NORTHERN RR
3.6 E OF SELBY, Walworth, SD
Built 2006 Load: 46.9 t ADT: 310
30880 UNIVER. ROAD
GoodOver: BAPTIST CK
2.8S HUB CITY, Clay, SD
Built 1995 Load: 47.0 t ADT: 220
FDR 345
GoodOver: IRON CREEK
T 2 S R 6 E SEC 31, Custer, SD
Built 1958 Load: 47.0 t ADT: 25
US385
GoodOver: FALL RV
0.5 N JCT US 18W, Fall River, SD
Built 1998 Load: 47.0 t ADT: 5,377
SD050
GoodOver: AMERICAN CK
0.5 N JCT I 90 LOOP, Brule, SD
Built 1999 Load: 47.1 t ADT: 3,199
413TH AVE
GoodOver: CK
1.6W 7.4N ARTESIAN, Sanborn, SD
Built 2022 Load: 47.1 t ADT: 147
122nd Street
GoodOver: Elm River
2S & 1.5E of Westport, Brown, SD
Built 2010 Load: 47.2 t ADT: 98
SD050
GoodOver: CK
12.7 N JCT SD 44, Charles Mix, SD
Built 1984 Load: 47.2 t ADT: 156
SD037
GoodOver: SOUTH FORK TWELVE MILE C
0.5 S DAVISON CO LINE, Hutchinson, SD
Built 2000 Load: 47.2 t ADT: 3,365
SD073
GoodOver: RED SCAFFOLD CK
5.9 S OF FAITH, Meade, SD
Built 1987 Load: 47.2 t ADT: 882
SD053
GoodOver: BUTTE CK
0.6 N JCT SD 44, Mellette, SD
Built 1989 Load: 47.2 t ADT: 106
SD037
GoodOver: UNNAMED CK
6.6N SPRINGFIELD, Bon Homme, SD
Built 2019 Load: 47.3 t ADT: 1,604
US212
GoodOver: TIMBER CK
0.1 W JCT SD 37 S, Spink, SD
Built 2007 Load: 47.3 t ADT: 1,170
29260 423rd Avenue
GoodOver: Dawson Creek
1W of Scotland, Bon Homme, SD
Built 2022 Load: 47.4 t ADT: 630
239th Street
GoodOver: Medicine Creek
0.5E & 0.5N of Vivian, Lyman, SD
Built 1986 Load: 47.4 t ADT: 20
NINTH STREET
GoodOver: BEAR BUTTE CK
9TH ST - STURGIS, Meade, SD
Built 2019 Load: 47.4 t ADT: 488
127th Street
GoodOver: Jorgenson River
0.8E of Peever, Roberts, SD
Built 1991 Load: 47.5 t ADT: 285
30650 472 AVE.
GoodOver: BRULE CK
8.5S BERESFORD, Union, SD
Built 1989 Load: 47.5 t ADT: 30
476TH AVENUE
GoodOver: TRIBUTARY TO MEDARY CK
2.1S AURORA, Brookings, SD
Built 2003 Load: 47.6 t ADT: 250
276th Street
GoodOver: Beaver Creek
3N & 2.1E of Lennox, Lincoln, SD
Built 2008 Load: 47.6 t ADT: 770
FDR 224
GoodOver: LITTLE CREEK
T 3 N R 5 E SEC 11, Meade, SD
Built 2002 Load: 47.6 t ADT: 25
SD044
GoodOver: BEAR CK
1.7 E OF SCENIC, Pennington, SD
Built 1976 Load: 47.6 t ADT: 486
410th Avenue
GoodOver: Creek
5.3N & 6.4E of Groton, Brown, SD
Built 2001 Load: 47.7 t ADT: 825
IRR SD044
GoodOver: CK
5.7 E JCT SD 73, Jackson, SD
Built 1980 Load: 47.7 t ADT: 455
US385 NF
GoodOver: SPRING CK
1.3 NE JCT US 16 E, Pennington, SD
Built 1996 Load: 47.7 t ADT: 5
US083
GoodOver: ARTICHOKE CK
1.6 N SULLY CO LINE, Potter, SD
Built 1989 Load: 47.7 t ADT: 1,452
215TH STREET
GoodOver: DEER CREEK
3.2E & 3S BROOKINGS, Brookings, SD
Built 2008 Load: 47.9 t ADT: 92
FDR 345
GoodOver: IRON CREEK
T 2 S R 6 E SEC 31, Custer, SD
Built 1956 Load: 48.0 t ADT: 25
294th Street
GoodOver: Blind Creek
3N & 5.3W Beresford, Lincoln, SD
Built 2013 Load: 48.0 t ADT: 250
SD034
GoodOver: CK
5.2 E SANBORN CO LINE, Miner, SD
Built 2023 Load: 48.0 t ADT: 1,092
188 STREET
GoodOver: COBB CK
2.6E BRANDT, Deuel, SD
Built 2017 Load: 48.1 t ADT: 260
FAS 6313
GoodOver: BOXELDER CK
11 W 7.9 N LADNER, Harding, SD
Built 2013 Load: 48.1 t ADT: 25
161ST STREET
GoodOver: JAMES RIVER
4.2N 2.4E ASHTON, Spink, SD
Built 2004 Load: 48.1 t ADT: 50
476TH AVENUE
GoodOver: SIX MILE CK
2W & 0.4S WHITE, Brookings, SD
Built 2007 Load: 48.2 t ADT: 92
206TH STREET
GoodOver: CK
2.5S & 0.7W WHITE, Brookings, SD
Built 1999 Load: 48.2 t ADT: 92
US385
GoodOver: BEAVER CK
10.6 S JCT US 16, Custer, SD
Built 1992 Load: 48.2 t ADT: 2,380
349 AVENUE
GoodOver: SOUTH FORK WHETSTONE CK
2.4S & 1.1E OF LUCAS, Gregory, SD
Built 1997 Load: 48.3 t ADT: 36
476TH AVENUE
GoodOver: DEER CK
5E & 1.7N BROOKINGS, Brookings, SD
Built 1997 Load: 48.4 t ADT: 92
480TH AVENUE
GoodOver: CK
2.7N & 2E BUSHNELL, Brookings, SD
Built 1990 Load: 48.4 t ADT: 92
SD025
GoodOver: CK
2.1 N JCT US 14, Kingsbury, SD
Built 2023 Load: 48.4 t ADT: 1,339
164TH STREET
GoodOver: BOXELDER CK
1S 3.5E NEWUNDERWOOD, Pennington, SD
Built 2019 Load: 48.4 t ADT: 48
SD046
GoodOver: EAST FORK FROG CK
2.5 E JCT SD 19 N, Clay, SD
Built 1983 Load: 48.6 t ADT: 2,717
FDR 345
GoodOver: IRON CREEK
T 2 S R 6 E SEC 32, Custer, SD
Built 1958 Load: 48.6 t ADT: 25
264TH STREET
GoodOver: NORTH BR TWELVE MILE CK
10S & 1.8 W MITCHELL, Davison, SD
Built 2001 Load: 48.7 t ADT: 64
Showing 4,451-4,500 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.