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
SD248
FairOver: TIN PAN CK
4.6 W JCT US 183, Lyman, SD
Built 1953 Load: 23.1 t ADT: 219
KENTUCKY PL.
FairOver: SULFUR CK
9.8S & 2.1E MUD BUTTE, Meade, SD
Built 1925 Load: 23.2 t ADT: 30
48250 VIRGINIA RD
FairOver: CK
3.5E & 0.5N ALCESTER, Union, SD
Built 1991 Load: 23.2 t ADT: 55
SD073
FairOver: LITTLE WHITE RV
3 S OF MARTIN, Bennett, SD
Built 1964 Load: 23.3 t ADT: 523
I029 S
FairOver: CK, BURLINGTON NOR RR
4.8 S SD 20 INTERCH, Codington, SD
Built 1974 Load: 23.3 t ADT: 4,175
US014
FairOver: CK
2.5 NE JACKSON CO LINE, Haakon, SD
Built 1955 Load: 23.3 t ADT: 1,015
41440 257 STREET
FairOver: JAMES RV
6.6 W ALEXANDRIA, Hanson, SD
Built 1975 Load: 23.3 t ADT: 195
SD248
FairOver: BRAVE BULL CK
0.4 E OF BELVIDERE, Jackson, SD
Built 1942 Load: 23.3 t ADT: 84
SD248
FairOver: MEDICINE CK
4.9 W LYMAN CO LINE, Jones, SD
Built 1942 Load: 23.3 t ADT: 220
COUNTY HIGHWAY #23
FairOver: OAK CK
3S MOSHER, Mellette, SD
Built 1957 Load: 23.3 t ADT: 63
SD046
FairOver: EAST BRULE CK
7.9 E OF BERESFORD, Union, SD
Built 1954 Load: 23.3 t ADT: 1,852
SD044
FairOver: JAMES RV
15 E JCT SD 37, Hutchinson, SD
Built 1962 Load: 23.4 t ADT: 1,592
237 ST
FairOver: EAST FORK VERMILLION RV
4.7S & 3.6E WINFRED, Lake, SD
Built 1940 Load: 23.4 t ADT: 91
MYSTIC ROAD
FairOver: CASTLE CK
0.3W 0.6S MYSTIC, Pennington, SD
Built 1940 Load: 23.4 t ADT: 128
294 STREET
FairOver: PONCA CK
3.1W & 3S BURKE, Gregory, SD
Built 1950 Load: 23.5 t ADT: 140
10 Mile Road
FairOver: GRINDSTONE CK
3.3 W & 10 N PHILIP, Haakon, SD
Built 1965 Load: 23.5 t ADT: 80
300 AVENUE
FairOver: KEYA PAHA RV
7W & 2.4S CLEARFIELD, Tripp, SD
Built 1982 Load: 23.6 t ADT: 31
SD050
FairOver: SNATCH CK
3.3 NW JCT SD 25, Bon Homme, SD
Built 1956 Load: 23.7 t ADT: 2,322
SD034
FairOver: DRAINAGE DITCH
0.6 E I 90 INTERCH, Meade, SD
Built 1964 Load: 23.7 t ADT: 8,970
224 ST
FairOver: REDSTONE CK
2S & 2.8W CARTHAGE, Miner, SD
Built 1930 Load: 23.7 t ADT: 52
CONATA BASIN RD
FairOver: Trib to White River
1.7E &12.3S WALL, Pennington, SD
Built 1982 Load: 23.7 t ADT: 66
172ND ST
FairOver: OKOBOJO CK
4N & 2.9W AGAR, Sully, SD
Built 1912 Load: 23.7 t ADT: 25
US014
FairOver: WITCHER HOLES CK
10.9 W OF MIDLAND, Haakon, SD
Built 1994 Load: 23.8 t ADT: 725
I090 W
FairOver: CK
2.6 E SD 38 INTERCH, Minnehaha, SD
Built 1961 Load: 23.8 t ADT: 8,550
HWY 1416
FairOver: Trib. to Box Elder Creek
10.2 E NEW UNDERWOOD, Pennington, SD
Built 1936 Load: 23.8 t ADT: 90
377TH ST
FairOver: SNAKE CREEK
4 W 3.9 N NORTHVILLE, Spink, SD
Built 1966 Load: 23.8 t ADT: 51
The Bottom Road
FairOver: Emanuel Creek
1W & 0.9S of Springfield, Bon Homme, SD
Built 1994 Load: 23.9 t ADT: 60
29420 420th Avenue
FairOver: Creek
3W & 1.2S of Scotland, Bon Homme, SD
Built 1915 Load: 23.9 t ADT: 60
142nd Street
FairOver: James River
1N & 1.6W of Stratford, Brown, SD
Built 2009 Load: 23.9 t ADT: 303
SD037 S
FairOver: LAKE MITCHELL SPILLWAY
2.7 N JCT I 90 LOOP, Davison, SD
Built 1943 Load: 23.9 t ADT: 2,460
SD044
FairOver: JOHNSON CK
1 E OF INTERIOR, Jackson, SD
Built 1956 Load: 23.9 t ADT: 571
288th Street
FairOver: Long Creek
9S & 0.7W of Lennox, Lincoln, SD
Built 1964 Load: 23.9 t ADT: 81
DEER VIEW ROAD
FairOver: ELK CK
8.4E&12.3S STURGIS, Meade, SD
Built 1965 Load: 23.9 t ADT: 10
246TH STREET
FairOver: TRIB TO BIG SIOUX RV
2.2E & 0.3S DELL RAPIDS, Minnehaha, SD
Built 1940 Load: 23.9 t ADT: 16
401ST AVE
FairOver: CREEK
5W & 5.7S DOLAND, Spink, SD
Built 1920 Load: 23.9 t ADT: 31
OLD HWY 85
FairOver: SOUTH FORK MOREAU RV
4.6 N 18.7 W HOOVER, Butte, SD
Built 1955 Load: 24.0 t ADT: 21
TWNSHP RD 170TH ST
FairOver: CROW TIMBER CK
7.6E & 2N TUNERVILLE, Deuel, SD
Built 1940 Load: 24.0 t ADT: 30
43350 283 ST.
FairOver: CK
3.0N,2.5E OF MENNO, Hutchinson, SD
Built 1982 Load: 24.0 t ADT: 15
OPAL RD.
FairOver: BEAVER DAM CK
9 S 8.5 E MAURINE, Meade, SD
Built 1966 Load: 24.0 t ADT: 23
MAIN STREET
FairOver: ANTELOPE CK
0.1S MISSION, Todd, SD
Built 1978 Load: 24.0 t ADT: 1,400
48040 312TH ST
FairOver: EAST UNION CK
10.5S & 1.4E ALCESTER, Union, SD
Built 1950 Load: 24.0 t ADT: 25
243 ST
FairOver: CK
4.5 W STORLA, Aurora, SD
Built 1924 Load: 24.1 t ADT: 101
367TH AVE
FairOver: SOUTH FORK SNAKE CK
6E & 6.6N MIRANDA, Faulk, SD
Built 1930 Load: 24.1 t ADT: 38
S. Cliff Avenue
FairOver: Big Sioux River
south of E. 10th Street, Minnehaha, SD
Built 1973 Load: 24.1 t ADT: 14,800
SD044
FairOver: RAPID CK
5.1 SE JCT US 385, Pennington, SD
Built 1958 Load: 24.1 t ADT: 3,104
197TH AVE
FairOver: Trib to Cottonwood Creek
0.2E & 0.7S OF QUINN, Pennington, SD
Built 1935 Load: 24.1 t ADT: 19
223RD STREET
FairOver: SAND CK
2.1E & 7N WOONSOCKET, Sanborn, SD
Built 2010 Load: 24.1 t ADT: 56
151ST ST
FairOver: SNAKE CREEK
3.6 W 3 N NORTHVILLE, Spink, SD
Built 1966 Load: 24.1 t ADT: 51
485TH AVENUE
FairOver: CK
6.9N & 1W ELKTON, Brookings, SD
Built 1930 Load: 24.2 t ADT: 92
350 AVE FAS 6471
FairOver: AMERICAN CK
0.2N PUKWANA, Brule, SD
Built 1962 Load: 24.2 t ADT: 308
Showing 1,101-1,150 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.