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
112th Street
PoorOver: Little Minnesota River
3E & 6.5S of Claire City, Roberts, SD
Built 1974 Load: 6.1 t ADT: 35
465th Avenue
PoorOver: Creek
1.5S & 2W of Wilmot, Roberts, SD
Built 1945 Load: 6.1 t ADT: 31
139th Street
PoorOver: Creek
2.8S & 1W of Wilmot, Roberts, SD
Built 1968 Load: 6.1 t ADT: 5
155TH ST
PoorOver: SNAKE CREEK
1.0S 1.8W NORTHVILLE, Spink, SD
Built 1930 Load: 6.1 t ADT: 31
382ND AVE
PoorOver: CREEK
1.5S 1.0W NORTHVILLE, Spink, SD
Built 1912 Load: 6.1 t ADT: 55
403RD AVE
PoorOver: TIMBER CREEK
3W & 1.8S TURTON, Spink, SD
Built 1935 Load: 6.1 t ADT: 31
265 ST
PoorOver: PLATTE CK
13S 1.1W WHITE LAKE, Aurora, SD
Built 1967 Load: 6.2 t ADT: 66
217th Street
PoorOver: Creek
9.7W & 12S of Wolsey, Beadle, SD
Built 1930 Load: 6.2 t ADT: 56
211th Street
PoorOver: S. Fork of Pearl Creek
0.6W & 3.0S of Iroquois, Beadle, SD
Built 1930 Load: 6.2 t ADT: 56
29600 426th Avenue
PoorOver: Prairie Creek
3S & 2E of Scotland, Bon Homme, SD
Built 1905 Load: 6.2 t ADT: 60
425th Avenue
PoorOver: Crow Creek
2E & 0.9S of Britton, Marshall, SD
Built 1940 Load: 6.2 t ADT: 51
242nd Street
PoorOver: Pipestone Creek
7.5E & 2S of Trent, Moody, SD
Built 1968 Load: 6.2 t ADT: 69
TOWN STREET
PoorOver: REDSTONE CK
CITY PARK - CARTHAGE, Miner, SD
Built 1955 Load: 6.3 t ADT: 30
40430 308th Street
PoorOver: Choteau Creek
6S & 1.8W of Avon, Bon Homme, SD
Built 1912 Load: 6.4 t ADT: 60
29140 408th Avenue
PoorOver: Trib. to Emanuel Creek
11.6N & 8W of Tyndall, Bon Homme, SD
Built 1930 Load: 6.4 t ADT: 50
137TH Street
PoorOver: Creek
3.2 W & 1 S of Andover, Day, SD
Built 1926 Load: 6.4 t ADT: 115
485 AVENUE
PoorOver: CK
3E & 4.9S ALBEE, Grant, SD
Built 1955 Load: 6.4 t ADT: 52
318th Avenue
PoorOver: Creek
3E & 6.5N of Kennebec, Lyman, SD
Built 1930 Load: 6.4 t ADT: 24
222 ST
PoorOver: REDSTONE CK
W EDGE OF CARTHAGE, Miner, SD
Built 1963 Load: 6.4 t ADT: 320
168TH ST
PoorOver: CREEK
4S 2.7W ATHOL, Spink, SD
Built 1940 Load: 6.4 t ADT: 50
112th Street
PoorOver: Crow Creek
2S & 0.6E of Britton, Marshall, SD
Built 1968 Load: 6.5 t ADT: 35
WINKLER RD
PoorOver: HORSE CK
5.0 W 4.1 N NEWELL, Butte, SD
Built 1958 Load: 6.6 t ADT: 47
29610 457 AVE
PoorOver: CK
1E & 5.1S VIBORG, Turner, SD
Built 1945 Load: 6.6 t ADT: 97
118th Street
PoorOver: Langford Ditch
5N & 1W of Langford, Marshall, SD
Built 1935 Load: 6.7 t ADT: 25
409th Avenue
PoorOver: S. Fork of Pearl Creek
9.4S of Cavour, Beadle, SD
Built 1935 Load: 6.8 t ADT: 120
180th Street
PoorOver: Big Sioux River
3N & 1.3W of Castlewood, Hamlin, SD
Built 1930 Load: 6.9 t ADT: 135
Willow St.-Presho
PoorOver: Medicine Creek
1E of Presho, Lyman, SD
Built 1930 Load: 6.9 t ADT: 60
269 STREET
PoorOver: OLD LODGE CK
2E & 9N WINNER, Tripp, SD
Built 1955 Load: 6.9 t ADT: 40
206TH STREET
PoorOver: SIXMILE CK
2.5S & 3.1W WHITE, Brookings, SD
Built 1940 Load: 7.0 t ADT: 92
410th Avenue
PoorOver: Pearl Creek
1E & 2.8S of Cavour, Beadle, SD
Built 1930 Load: 7.1 t ADT: 56
I-90 SERVICE ROAD
PoorOver: WHITEWOOD CK
1 MI E WHITEWOOD, Lawrence, SD
Built 1938 Load: 7.1 t ADT: 69
481st Avenue
PoorOver: East Brule Creek
5W & 4.4S of Fairview, Lincoln, SD
Built 1959 Load: 7.1 t ADT: 41
105th Street
PoorOver: Little Minnesota River
0.5N & 0.7E of Claire Cty, Roberts, SD
Built 1967 Load: 7.1 t ADT: 25
44820 304 ST
PoorOver: Tributary to Clay Creek
4N&2.2E Mission Hill, Yankton, SD
Built 1940 Load: 7.1 t ADT: 45
470TH AVENUE
PoorOver: CK
14.3N & 1W BROOKINGS, Brookings, SD
Built 1930 Load: 7.3 t ADT: 92
28070 416 AVE.
PoorOver: DRY CK
4.7S,6.0E PARKSTON, Hutchinson, SD
Built 1935 Load: 7.3 t ADT: 35
Old NE Road
PoorOver: BIG BUFFALO CK
2W & 2.4S CACTUS FLAT, Jackson, SD
Built 1940 Load: 7.3 t ADT: 27
300 AVENUE
PoorOver: SAND CK
1.4W & 2.1S KEYAPAHA, Tripp, SD
Built 1965 Load: 7.3 t ADT: 29
371 AVE
PoorOver: WOLF CK
11E & 11.7N MILLER, Hand, SD
Built 1930 Load: 7.4 t ADT: 10
268 STREET
PoorOver: OLD LODGE CK
3.3E & 9N WINNER, Tripp, SD
Built 1960 Load: 7.4 t ADT: 31
324 AVENUE
PoorOver: MOCASSIN CK
0.3N & 0.2E OF HAMILL, Tripp, SD
Built 1924 Load: 7.4 t ADT: 20
HORSESHOE BUTTE RD
PoorOver: BLACK PIPE CK
1.9E & 3.7S BELVIDERE, Jackson, SD
Built 1930 Load: 7.5 t ADT: 27
318 AVENUE
PoorOver: OLD LODGE CK
3E & 9.3N WINNER, Tripp, SD
Built 1958 Load: 7.6 t ADT: 37
407TH AVENUE
PoorOver: NORTH BR TWELVE MILE CK
2 W & 8.3 S MITCHELL, Davison, SD
Built 1930 Load: 7.7 t ADT: 64
100th Street
PoorOver: Wild Rice Creek
10N & 3.1E of Britton, Marshall, SD
Built 1935 Load: 7.8 t ADT: 80
473 AVENUE
PoorOver: SOUTH FORK WHETSTONE RV
5W & 0.2N MILBANK, Grant, SD
Built 1942 Load: 7.9 t ADT: 25
45190 299 ST
PoorOver: Trib. to Turkey Creek
2 S & 0.1 W Irene, Yankton, SD
Built 1940 Load: 7.9 t ADT: 5
212th Street
PoorOver: S. Fork of Pearl Creek
4S & 0.9W of Iroquois, Beadle, SD
Built 1922 Load: 8.1 t ADT: 56
42090 305th Street
PoorOver: Snatch Creek
1S & 3.9E of Tyndall, Bon Homme, SD
Built 1950 Load: 8.1 t ADT: 60
220TH ST
PoorOver: ROCK CK
5 S & 5.4 E ESMOND, Kingsbury, SD
Built 1987 Load: 8.1 t ADT: 10
Showing 5,101-5,150 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.