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
Private Driveway
GoodOver: Drainage Channel
W1/2 LOT-BLK10-N BENSN-SF, Minnehaha, SD
Built 2000 Load: 25.1 t ADT: 20
IRR SD063
GoodOver: CUT MEAT CK
0.3 W OF PARMELEE, Todd, SD
Built 2002 Load: 25.1 t ADT: 609
SD050
GoodOver: DRAINAGE DITCH
0.9 W IOWA LINE, Union, SD
Built 1960 Load: 25.1 t ADT: 1,147
SD258
GoodOver: SNOW CK
0.3N PLANKINTON INTERCH, Aurora, SD
Built 1965 Load: 25.2 t ADT: 807
458TH AVENUE
GoodOver: TURKEY RIDGE CK
2E & 0.8N VIBORG, Turner, SD
Built 2017 Load: 25.2 t ADT: 96
Private Driveway
GoodOver: Drainage Channel
Lot A Block 11-Benson Rd, Minnehaha, SD
Built 2000 Load: 25.5 t ADT: 20
Private Driveway
GoodOver: Drainage Channel
Tract 3Block 11-Benson Rd, Minnehaha, SD
Built 2000 Load: 25.5 t ADT: 20
Private Driveway
GoodOver: Drainage Channel
E1/2 LOT7&8 BL10 N BEN-SF, Minnehaha, SD
Built 2000 Load: 25.5 t ADT: 20
Private Driveway
GoodOver: Drainage Channel
LOT 9 BLK 10-N BENSON-SF, Minnehaha, SD
Built 2000 Load: 25.5 t ADT: 20
Private Driveway
GoodOver: Drainage Channel
Lot 10 Block 10-Benson Rd, Minnehaha, SD
Built 2000 Load: 25.5 t ADT: 20
47690 310TH ST
GoodOver: CK
8.5S & 2.1W ALCESTER, Union, SD
Built 2020 Load: 25.7 t ADT: 30
387th Avenue
GoodOver: Elm River
0.5N of Westport, Brown, SD
Built 1998 Load: 25.8 t ADT: 98
FULTON STREET
GoodOver: DEADMAN GULCH
FULTON ST - STURGIS, Meade, SD
Built 1979 Load: 25.8 t ADT: 50
404th Avenue
GoodOver: Pearl Creek
4.1E & 8.4S of Huron, Beadle, SD
Built 1995 Load: 25.9 t ADT: 56
27380 366th Avenue
GoodOver: Platte Creek
2.2N & 1.0W of Platte, Charles Mix, SD
Built 2019 Load: 25.9 t ADT: 48
40130 305th Street
GoodOver: Choteau Creek
5.0S & 1.3E of Dante, Charles Mix, SD
Built 2019 Load: 25.9 t ADT: 48
SD1806
GoodOver: WHETSTONE CK
8.0 N JCT US 18, Gregory, SD
Built 1977 Load: 25.9 t ADT: 158
28240 417 AVE.
GoodOver: CK
6 E 4.6 N TRIPP S.D., Hutchinson, SD
Built 2014 Load: 25.9 t ADT: 45
383 AVENUE
GoodOver: CK
1E 2S WESS. SPRINGS, Jerauld, SD
Built 1963 Load: 25.9 t ADT: 180
42150 288 ST
GoodOver: SOUTH BR LONETREE CK
4.5W & 2.0S OF OLIVET, Hutchinson, SD
Built 2005 Load: 26.1 t ADT: 50
476TH AVENUE
GoodOver: MEDARY CK
1.0S AURORA, Brookings, SD
Built 2003 Load: 26.2 t ADT: 257
464th Avenue
GoodOver: Big Sioux River
1W & 0.2S of Estelline, Hamlin, SD
Built 1990 Load: 26.2 t ADT: 66
47610 316 ST
GoodOver: BRULE CK
8.0N & 0.1E ELK POINT, Union, SD
Built 2006 Load: 26.2 t ADT: 32
217th Street
GoodOver: Sand Creek
4W & 3.5S of Virgil, Beadle, SD
Built 1995 Load: 26.3 t ADT: 56
247TH STREET
GoodOver: JAMES RV
7 N 0.2 E MITCHELL, Davison, SD
Built 1975 Load: 26.3 t ADT: 466
45880 298 ST.
GoodOver: FROG CK
1S & 6.8E IRENE, Clay, SD
Built 2011 Load: 26.4 t ADT: 50
EXIT 10 SERVICE RD
GoodOver: SPEARFISH CK
0.2 W JCT US 85, Lawrence, SD
Built 1971 Load: 26.4 t ADT: 2,000
196th Street
GoodOver: Creek
6N & 5.7E of Wessington, Beadle, SD
Built 1939 Load: 26.5 t ADT: 131
480th Avenue
GoodOver: Beaver Creek
1.2N CANTON, Lincoln, SD
Built 2014 Load: 26.5 t ADT: 63
247th Street
GoodOver: Wolf Creek
5N & 0.5E of Spencer, McCook, SD
Built 2001 Load: 26.5 t ADT: 145
SD044
GoodOver: BR CHOTEAU CK
5.2 E JCT US 281 S, Douglas, SD
Built 1960 Load: 26.6 t ADT: 1,721
WHITE GATES
GoodOver: LITTLE ELK CREEK
T 3 N R 5 E SEC 11, Meade, SD
Built 1973 Load: 26.6 t ADT: 100
29840 458 AVE
GoodOver: FLYNN DICKERSON DITCH
1.4S & 6E IRENE, Clay, SD
Built 2004 Load: 26.7 t ADT: 45
ROOSEVELT STREET N
GoodOver: MOCCASIN CREEK
ROOSEVELT AVE - ABERDEEN, Brown, SD
Built 1995 Load: 26.8 t ADT: 3,845
465th Avenue
GoodOver: Hidewood Creek
1.7N of Estelline, Hamlin, SD
Built 2005 Load: 26.8 t ADT: 720
SD115
GoodOver: NINE MILE CK
1.5 W & .7 S HARRISBURG, Lincoln, SD
Built 2011 Load: 26.8 t ADT: 2,592
459TH AVENUE
GoodOver: WEST BR SKUNK CK
5W & 4.3S COLTON, Minnehaha, SD
Built 2003 Load: 26.8 t ADT: 71
45500 282 ST
GoodOver: CK
1N & 1W HURLEY, Turner, SD
Built 2016 Load: 26.8 t ADT: 97
413th Avenue
GoodOver: Creek
5.0 S & 1.0 W of RAYMOND, Clark, SD
Built 2020 Load: 26.9 t ADT: 42
403RD AVENUE
GoodOver: CK
8 W 5.8 N ETHAN, Davison, SD
Built 2013 Load: 26.9 t ADT: 208
COUNTY RD
GoodOver: ROCK CK
1S & 2.1E CARTHAGE, Miner, SD
Built 1990 Load: 26.9 t ADT: 30
240th Street
GoodOver: Pipestone Creek
8.1E of Trent, Moody, SD
Built 1994 Load: 26.9 t ADT: 165
NORTH STREET
GoodOver: DRAINAGE DITCH
0.1W OF EAST BLVD & N ST, Pennington, SD
Built 1980 Load: 26.9 t ADT: 6,017
478TH AVE, HWY 121
GoodOver: SLIP-UP CREEK
4E & 1.3S BALTIC, Minnehaha, SD
Built 2013 Load: 27.0 t ADT: 1,152
US014
GoodOver: CK
7.6 E HYDE CO LINE, Hand, SD
Built 1935 Load: 27.1 t ADT: 1,935
US014
GoodOver: CK
8.6 E HYDE CO LINE, Hand, SD
Built 1935 Load: 27.2 t ADT: 1,935
IRR US018
GoodOver: CK
5.8 NW OF PINE RIDGE, Oglala Lakota, SD
Built 2011 Load: 27.2 t ADT: 2,241
305th Avenue
GoodOver: Stoney Butte Creek
1W & 1.4N of Presho, Lyman, SD
Built 1966 Load: 27.3 t ADT: 280
IRR US018
GoodOver: CK
3.9 N OF PINE RIDGE, Oglala Lakota, SD
Built 2011 Load: 27.3 t ADT: 3,442
48340 301ST
GoodOver: CK
3.4E ALCESTER, Union, SD
Built 2023 Load: 27.3 t ADT: 50
Showing 3,551-3,600 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.