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
ALKALI RD.
FairOver: BELLE FOURCHE RV
3 W HEREFORD, Meade, SD
Built 1983 Load: 40.3 t ADT: 40
SD1804
FairOver: CHEYENNE CK
3.7 N JCT US 212, Potter, SD
Built 1969 Load: 40.3 t ADT: 277
SD089
FairOver: DRY RUN CK
7.2 N FALL RIVER CO LINE, Custer, SD
Built 1970 Load: 40.4 t ADT: 990
US085 S
FairOver: REDWATER RV
AT BUTTE CO LINE, Lawrence, SD
Built 1986 Load: 40.4 t ADT: 4,417
US085 S
FairOver: POLO CK
1 S I 90 INTERCH, Lawrence, SD
Built 1971 Load: 40.4 t ADT: 3,439
Minnesota Avenue
FairOver: Big Sioux Diversion
south of 60th Street N, Minnehaha, SD
Built 1972 Load: 40.4 t ADT: 5,640
US014 E
FairOver: SIX MILE CK
1 SE JCT US 14 BY-PASS, Brookings, SD
Built 1967 Load: 40.5 t ADT: 1,917
US014 W
FairOver: SIX MILE CK
1 SE JCT US 14 BY-PASS, Brookings, SD
Built 1970 Load: 40.5 t ADT: 1,917
KIRK RD
FairOver: WHITEWOOD CK
1.0E 0.5S LEAD, Lawrence, SD
Built 2004 Load: 40.5 t ADT: 69
469th Avenue
FairOver: Saddle Creek
8.9S & 3E of Lennox, Lincoln, SD
Built 2010 Load: 40.5 t ADT: 135
IRR BIA RTE 44
FairOver: WEST FORK OF OAK CREEK
1 KM NE OF MAHTO, Corson, SD
Built 1961 Load: 40.6 t ADT: 213
NEW UNDERWOOD RD.
FairOver: BELLE FOURCHE RV
17 N NEW UNDERWOOD, Meade, SD
Built 1975 Load: 40.7 t ADT: 280
SD026
FairOver: MEDICINE CK
0.3 E HAND CO LINE, Spink, SD
Built 1989 Load: 40.7 t ADT: 244
SD109
FairOver: BURLINGTON NORTHERN RR
0.1 N JCT US 12, Grant, SD
Built 1983 Load: 40.8 t ADT: 1,177
SD073
FairOver: WEST PLUM CK
2.8 S JCT SD 34, Haakon, SD
Built 1990 Load: 40.8 t ADT: 422
US014A, PINE ST
FairOver: WHITEWOOD CK
AT JCT US 85 S, Lawrence, SD
Built 1967 Load: 40.8 t ADT: 10,880
241 STREET
FairOver: CK
5.3W & 10N KIMBALL, Brule, SD
Built 1959 Load: 40.9 t ADT: 45
US085 N
FairOver: POLO CK
1 S I 90 INTERCH, Lawrence, SD
Built 1971 Load: 40.9 t ADT: 3,439
309 AVENUE
FairOver: MEDICINE KNOLL CK
0.3 W 1 S BLUNT, Hughes, SD
Built 2003 Load: 41.0 t ADT: 150
I229 NF (WESTERN)
FairOver: BIG SIOUX RV
0.1 S I 229 INTERCH, Minnehaha, SD
Built 1995 Load: 41.0 t ADT: 17,000
SHERIDAN LAKE ROAD
FairOver: SPRING CK
1.9N3.4W.ROCKERVILLE, Pennington, SD
Built 1974 Load: 41.0 t ADT: 933
SHERIDAN LAKE ROAD
FairOver: SPRING CK
1.8N3.3W ROCKERVILLE, Pennington, SD
Built 1974 Load: 41.0 t ADT: 933
SD044
FairOver: CK
2.2 E JCT US16B & SD 44, Pennington, SD
Built 2008 Load: 41.0 t ADT: 5,934
133rd Street
FairOver: Foot Creek
1.9W of Aberdeen, Brown, SD
Built 2002 Load: 41.1 t ADT: 60
SD044
FairOver: CK
1.2 W JCT SD 47, Gregory, SD
Built 1971 Load: 41.1 t ADT: 568
48480 298TH ST
FairOver: CK
12.8E BERESFORD, Union, SD
Built 1987 Load: 41.1 t ADT: 55
SD011
FairOver: SPLIT ROCK CK
0.4 S OF GARRETSON, Minnehaha, SD
Built 1964 Load: 41.2 t ADT: 3,286
US012 E
FairOver: BNSF RR
3.2 W JCT SD 37, Brown, SD
Built 2005 Load: 41.3 t ADT: 2,783
I029 N
FairOver: PEG MUNKY RUN CK
0.9 N SD 28 INTERCH, Deuel, SD
Built 1973 Load: 41.3 t ADT: 4,290
SD013
FairOver: SPRING CK
5.2 S BROOKINGS CO LINE, Moody, SD
Built 1963 Load: 41.3 t ADT: 1,135
161ST AVENUE
FairOver: BOXELDER CK
0.6S NEW UNDERWOOD, Pennington, SD
Built 1973 Load: 41.3 t ADT: 780
SD010
FairOver: CK
5.6 E JCT SD 45, McPherson, SD
Built 1957 Load: 41.4 t ADT: 762
252ND ST, HWY 118
FairOver: SLIP-UP CREEK
4.1E & 2S BALTIC, Minnehaha, SD
Built 1973 Load: 41.4 t ADT: 610
168TH STREET
FairOver: TIMBER CREEK
4N & 5.2W DOLAND, Spink, SD
Built 1990 Load: 41.5 t ADT: 24
SD044
FairOver: LONG CK
0.9 W JCT SD 17, Lincoln, SD
Built 1968 Load: 41.6 t ADT: 1,642
ELM SPRINGS RD.
FairOver: BELLE FOURCHE RV
1.9W 3.8N ELM SPRING, Meade, SD
Built 1988 Load: 41.6 t ADT: 60
IRR AR SD063
FairOver: BLACK PIPE CK
0.1 SE JACKSON CO LINE, Mellette, SD
Built 1970 Load: 41.6 t ADT: 159
SD044
FairOver: BLACK PIPE CK
0.3 E JCT SD 63, Mellette, SD
Built 1987 Load: 41.6 t ADT: 328
SD019
FairOver: TURKEY RIDGE CK
2.1 S JCT US 18 WEST, Turner, SD
Built 1963 Load: 41.6 t ADT: 1,358
BROADWAY AVE
FairOver: HILGERS GULCH
BROADWAY AVE PIERRE, Hughes, SD
Built 1964 Load: 41.7 t ADT: 6,045
I090 E
FairOver: SPRING CK
3 SE SD 34 N INTERCH, Lawrence, SD
Built 1967 Load: 41.7 t ADT: 7,485
SD044
FairOver: PINE CK
2.3 W JCT US 83, Mellette, SD
Built 1973 Load: 41.7 t ADT: 328
Russell Street WBL
FairOver: Big Sioux River
west of Kiwanis Avenue, Minnehaha, SD
Built 2013 Load: 41.7 t ADT: 19,500
I229 S
FairOver: BIG SIOUX RV
0.2 NE 26 ST INTERCH, Minnehaha, SD
Built 1997 Load: 41.7 t ADT: 18,295
I229 N
FairOver: BIG SIOUX RV
0.2 NE 26TH ST INTERCH, Minnehaha, SD
Built 1998 Load: 41.7 t ADT: 18,295
IRR I029 S
FairOver: BURLINGTON NORTHERN RR
0.6 S US 12 INTERCH, Roberts, SD
Built 1979 Load: 41.7 t ADT: 3,340
SD019A
FairOver: VERMILLION RV
0.3 N JCT SD 46, Turner, SD
Built 1968 Load: 41.7 t ADT: 700
COLORADO BLVD
FairOver: FALSE BOTTOM CK
2.4E JCT US14A -SPEARFISH, Lawrence, SD
Built 1978 Load: 41.8 t ADT: 1,500
I090 W
FairOver: SPRING CK
3 SE SD 34 N INTERCH, Lawrence, SD
Built 1968 Load: 41.8 t ADT: 7,485
SD019
FairOver: MISSOURI RIVER/COUNTY RD
4.1 S. OF VERMILLION, Clay, SD
Built 2001 Load: 41.9 t ADT: 1,548
Showing 2,601-2,650 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.