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
265TH STREET
FairOver: TRIB TO FOUR MILE CK
3S & 2.4W VALLEY SPRINGS, Minnehaha, SD
Built 1983 Load: 19.6 t ADT: 51
485TH AVENUE
FairOver: TRIB TO SPLIT ROCK CK
3E & 2.7N CORSON, Minnehaha, SD
Built 1990 Load: 19.6 t ADT: 18
485TH AVENUE
FairOver: FOUR MILE CREEK
2W & 2.8S VALLEY SPRINGS, Minnehaha, SD
Built 1993 Load: 19.6 t ADT: 13
485TH AVENUE
FairOver: TRIB TO FOUR MILE CK
2W & 3.4S VALLEY SPRINGS, Minnehaha, SD
Built 1981 Load: 19.6 t ADT: 14
263RD STREET
FairOver: BEAVER CREEK
1.8W & 1S VALLEY SPRINGS, Minnehaha, SD
Built 1977 Load: 19.6 t ADT: 15
257TH STREET
FairOver: TRIB TO SPLIT ROCK CK
4S & 0.5E GARRETSON, Minnehaha, SD
Built 1938 Load: 19.6 t ADT: 19
486TH AVENUE
FairOver: PIPESTONE CREEK
1W & 3.5N SHERMAN, Minnehaha, SD
Built 1979 Load: 19.6 t ADT: 33
486TH AVENUE
FairOver: FOUR MILE CREEK
2.5S & 1W VALLEY SPRINGS, Minnehaha, SD
Built 1992 Load: 19.6 t ADT: 15
261ST STREET
FairOver: TRIB TO BEAVER CK
1N & 0.3W VALLEY SPRINGS, Minnehaha, SD
Built 1978 Load: 19.6 t ADT: 62
487TH AVE, HWY 103
FairOver: PIPESTONE CREEK
3.4N SHERMAN, Minnehaha, SD
Built 1990 Load: 19.6 t ADT: 217
487TH AVE, HWY 103
FairOver: FOUR MILE CREEK
2.6S VALLEY SPRINGS, Minnehaha, SD
Built 1987 Load: 19.6 t ADT: 535
395TH AVE
FairOver: MUD CREEK
3.7 N BRENTFORD, Spink, SD
Built 1956 Load: 19.6 t ADT: 302
44970 287TH ST.
FairOver: CK
4N & 6.3W VIBORG, Turner, SD
Built 2002 Load: 19.6 t ADT: 50
LOCUST STREET
FairOver: MARNE CREEK
LOCUST STREET - YANKTON, Yankton, SD
Built 1984 Load: 19.6 t ADT: 343
Cliff Avenue
FairOver: Big Sioux River
N of Walnut Street - SF, Minnehaha, SD
Built 1994 Load: 19.7 t ADT: 13,370
174TH ST
FairOver: TURTLE CREEK
0.7 S 2.6 W REDFIELD, Spink, SD
Built 1965 Load: 19.7 t ADT: 126
193rd Street
FairOver: James River
15N & 0.6W of Huron, Beadle, SD
Built 1954 Load: 19.8 t ADT: 56
359TH AVE
FairOver: CK
5.1N & 1W MILLER, Hand, SD
Built 1910 Load: 19.8 t ADT: 15
466th Avenue
FairOver: Long Creek
2.6N of Jct. US Hwy 18, Lincoln, SD
Built 1951 Load: 19.8 t ADT: 1,017
284th Street
FairOver: S Fork of Beaver Creek
2S & 4.6W of Canton, Lincoln, SD
Built 1997 Load: 19.8 t ADT: 75
247 ST
FairOver: WEST FIRESTEEL CK
6.3E 6N PLANKINTON, Aurora, SD
Built 1982 Load: 19.9 t ADT: 65
27080 405 AVE.
FairOver: SOUTH FORK TWELVE MILE C
5 W & 0.8 S DIMOCK, Hutchinson, SD
Built 1952 Load: 19.9 t ADT: 69
231 AVENUE
FairOver: LAKE CK
0.5 S TUTHILL, Bennett, SD
Built 1954 Load: 20.0 t ADT: 120
483 AVENUE
FairOver: COBB CK
4.1 N ASTORIA, Deuel, SD
Built 1956 Load: 20.0 t ADT: 157
482 AVENUE
FairOver: CK
1.4N ALBEE, Grant, SD
Built 1930 Load: 20.0 t ADT: 336
339 AVENUE
FairOver: MEDICINE CK
2E & 3S OF HIGHMORE, Hyde, SD
Built 1969 Load: 20.0 t ADT: 45
EMPIRE PL.
FairOver: ELK CK
11E&12.5S STURGIS, Meade, SD
Built 1965 Load: 20.0 t ADT: 15
44240 293rd Street
FairOver: Clay Creek
4N & 9.7W of Irene, Yankton, SD
Built 1938 Load: 20.0 t ADT: 55
369TH AVE
FairOver: CK
8.5N VAYLAND, Hand, SD
Built 1960 Load: 20.1 t ADT: 43
315 AVENUE
FairOver: MUD CK
0.6W & 4.3S WINNER, Tripp, SD
Built 1958 Load: 20.1 t ADT: 375
119th Street
FairOver: Crow Creek Ditch
1S & 5.5W of Claremont, Brown, SD
Built 1957 Load: 20.2 t ADT: 125
E. Grindstone Rd.
FairOver: NORTH FORK BAD RV
12.1 W 4.6 N PHILIP, Haakon, SD
Built 1960 Load: 20.2 t ADT: 28
SD 248 EF
FairOver: CK
0.1 N JCT I90, Lyman, SD
Built 1947 Load: 20.2 t ADT: 2,265
303 AVENUE
FairOver: SAND CK
1.5E & 0.3N KEYAPAHA, Tripp, SD
Built 1959 Load: 20.2 t ADT: 71
28860 395th Avenue
FairOver: Choteau Creek
8.4N of Wagner, Charles Mix, SD
Built 1963 Load: 20.3 t ADT: 241
313th Avenue
FairOver: Creek
2W & 8.8S of Kennebec, Lyman, SD
Built 1963 Load: 20.3 t ADT: 24
153RD STREET
FairOver: CREEK
1.8W & 1N CONDE, Spink, SD
Built 1932 Load: 20.3 t ADT: 50
108TH AVE.
FairOver: REDWATER RV
1W 6.5N SPEARFISH, Lawrence, SD
Built 2008 Load: 20.4 t ADT: 48
OLD HILL CITY ROAD
FairOver: BATTLE CK
.8 WEST OF KEYSTONE, Pennington, SD
Built 1973 Load: 20.4 t ADT: 984
SD010
FairOver: JAMES RV
2.7 W OF HOUGHTON, Brown, SD
Built 1948 Load: 20.5 t ADT: 484
196TH AVE
FairOver: Trib to Cottonwood Creek
0.5W & 1.8S OF QUINN, Pennington, SD
Built 1957 Load: 20.5 t ADT: 24
41420 310th Street
FairOver: Creek
2N & 0.8W of Springfield, Bon Homme, SD
Built 1970 Load: 20.6 t ADT: 60
171ST ST
FairOver: CK
6.5W & 1N ZELL, Faulk, SD
Built 1927 Load: 20.6 t ADT: 15
313th Avenue
FairOver: Hiddenwood Creek
1W & 2.3N of Java, Walworth, SD
Built 1955 Load: 20.6 t ADT: 33
392 AVE
FairOver: WEST FIRESTEEL CK
3.9S 1W STORLA, Aurora, SD
Built 1951 Load: 20.7 t ADT: 65
OLD FT THOMPSON RD
FairOver: SOLDIER CREEK
1 Mi. So. of Ft. Thompson, Buffalo, SD
Built 1973 Load: 20.7 t ADT: 50
369TH AVE
FairOver: LITTLE TURTLE CK
8N VAYLAND, Hand, SD
Built 1960 Load: 20.7 t ADT: 43
DIAMOND RD.
FairOver: ALKALI CK
11E & 2.3S STURGIS, Meade, SD
Built 1978 Load: 20.7 t ADT: 10
I090 WF
FairOver: AMERICAN CROW CK
0.9 W OACOMA INTERCH, Lyman, SD
Built 1954 Load: 20.8 t ADT: 2,622
451st Avenue
FairOver: East Vermillion Lake
7.1S of Montrose, McCook, SD
Built 1958 Load: 20.8 t ADT: 675
Showing 951-1,000 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.