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
41480 299th Street
PoorOver: Emanuel Creek
4N & 1.2W of Tyndall, Bon Homme, SD
Built 1905 ADT: 20
GAVER ROAD
PoorOver: REDWATER RV
1.5S 1.5E B. FOURCHE, Butte, SD
Built 1920 ADT: 47
38930 302 ST
PoorOver: CK
9.0S,1.3E OF RAVINA, Charles Mix, SD
Built 1941 ADT: 48
46080 314 ST.
PoorOver: CLAY CK DITCH
3.5N & 3.2W VERMILLION, Clay, SD
Built 1900 ADT: 97
46530 314TH ST.
PoorOver: VERMILLION RV
3.5N & 1.3E VERMILLION, Clay, SD
Built 1930 ADT: 97
46540 307TH ST.
PoorOver: BAPTIST CK
10S & 13.4E IRENE, Clay, SD
Built 1940 ADT: 97
29830 ASH CRK AVE.
PoorOver: ASH CK
1.3S & 13.5E IRENE, Clay, SD
Built 1945 ADT: 25
46580 313 ST.
PoorOver: VERMILLION RV
7.0 S & 0.6 E HUB CITY, Clay, SD
Built 1910 ADT: 40
29810 466 ST.
PoorOver: ASH CK
1.2S & 14E IRENE, Clay, SD
Built 1940 ADT: 5
12590-416TH AVENUE
PoorOver: CK
3W & 4.IN PIERPONT, Day, SD
Built 1932 ADT: 70
476 AVE
PoorOver: CK
2.0W & 5.1S MILBANK, Grant, SD
Built 1901 ADT: 20
179 STREET
PoorOver: STRAY HORSE CK
4.9E & 4N CASTLEWOOD, Hamlin, SD
Built 1910 ADT: 5
368 AVE
PoorOver: WOLF CK
8 E & 9.9 N MILLER, Hand, SD
Built 1915 ADT: 10
27490 416 AVE.
PoorOver: PONY CK
2.1N,6.0E PARKSTON, Hutchinson, SD
Built 1986 ADT: 25
211 AVENUE
PoorOver: WHITEWATER CK
2E & 4S COTTONWOOD, Jackson, SD
Built 1940 ADT: 14
CHRISTENSEN ROAD
PoorOver: FALSE BOTTOM CK
Int Christensen Maitland, Lawrence, SD
Built 1970 ADT: 100
900006: PETERSON
PoorOver: Whitewood Creek
2 mi S of Lead, SD, Lawrence, SD
Built 2011 ADT: 25
465TH AVENUE
PoorOver: BLIND CK
6W & 2.5N BERESFORD, Lincoln, SD
Built 1935 ADT: 35
289th Street
PoorOver: Long Creek
10S & 0.9W of Lennox, Lincoln, SD
Built 1935 ADT: 47
COUNTY RD
PoorOver: CK
3N & 8.9E KENNEBEC, Lyman, SD
Built 1945 ADT: 10
COUNTY RD
PoorOver: CK
17.1S & 7.3E RELIANCE, Lyman, SD
Built 1950 ADT: 10
KENTUCKY PL.
PoorOver: SULPHUR CK
9.7S & 2.8E MUD BUTTE, Meade, SD
Built 1925 ADT: 30
425 AVE
PoorOver: ROCK CK
10.0W & 0.9S CANOVA, Miner, SD
Built 1920 ADT: 30
SMITHWICK ROAD
PoorOver: WHITE RIVER
.75 KM NE OF BIA RTE 41, Oglala Lakota, SD
Built 1935 ADT: 10
195 STREET
PoorOver: MEDICINE KNOLL CK
10S & 8.2E ONIDA, Sully, SD
Built 1913 ADT: 10
456TH AVE
PoorOver: ELCE CK
3.7N & 3E PARKER, Turner, SD
Built 1934 ADT: 35
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
246 ST
PoorOver: FIRESTEEL CK
6.8E 7N PLANKINTON, Aurora, SD
Built 1930 Load: 2.7 t ADT: 65
386th Avenue
PoorOver: Sand Creek
3.5W & 4.5S of Virgil, Beadle, SD
Built 1915 Load: 2.7 t ADT: 56
211TH ST
PoorOver: CAIN CK
3N VIRGIL, Beadle, SD
Built 1928 Load: 2.7 t ADT: 56
212th Street
PoorOver: Middle Pearl Creek
4S & 3.8W of Iroquois, Beadle, SD
Built 1928 Load: 2.7 t ADT: 56
40370 311th Street
PoorOver: Choteau Creak
10.2W & 1N of Springfield, Bon Homme, SD
Built 1905 Load: 2.7 t ADT: 50
Jefferson Road
PoorOver: Trib. to Dry Choteau Ck
0.4N of Avon, Bon Homme, SD
Built 1945 Load: 2.7 t ADT: 60
29970 415th Avenue
PoorOver: Trib. to Emanuel Creek
1W & 3.3N of Tyndall, Bon Homme, SD
Built 1930 Load: 2.7 t ADT: 60
398th Avenue
PoorOver: Mud Creek
2E & 2.4S of Sratford, Brown, SD
Built 1915 Load: 2.7 t ADT: 98
103rd Street
PoorOver: James River
0.7N & 1W of Hecla, Brown, SD
Built 1900 Load: 2.7 t ADT: 98
KLING RD
PoorOver: HAY CK
6W 1.5S B FOURCHE, Butte, SD
Built 1930 Load: 2.7 t ADT: 12
YPPARILLA RD
PoorOver: CK
3 N .4 W NEWELL, Butte, SD
Built 1960 Load: 2.7 t ADT: 47
EICHER RD
PoorOver: HORSE CK
3.2 S NEWELL.8E US79, Butte, SD
Built 1950 Load: 2.7 t ADT: 47
ZEONA RD
PoorOver: CK
1.0N & 3.5E HOOVER, Butte, SD
Built 1966 Load: 2.7 t ADT: 4
37570 287 STREET
PoorOver: PEASE CK
2.0S,1.7E OF GEDDES, Charles Mix, SD
Built 1920 Load: 2.7 t ADT: 48
39540 287th Street
PoorOver: Choteau Creek
10.0N & 0.4E of Wagner, Charles Mix, SD
Built 1940 Load: 2.7 t ADT: 48
46380 308 ST
PoorOver: VERMILLION RV
10.5S & 11.8E IRENE, Clay, SD
Built 1930 Load: 2.7 t ADT: 15
46610 305TH ST.
PoorOver: BAPTIST CK
8S & 14.1E IRENE SD, Clay, SD
Built 1935 Load: 2.7 t ADT: 15
167 STREET
PoorOver: WILLOW CK
2.2W 5N KRANZBURG, Codington, SD
Built 1910 Load: 2.7 t ADT: 73
Showing 4,951-5,000 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.