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
248th Street
FairOver: Wolf Creek
4N & 0.4E of Spencer, McCook, SD
Built 1993 Load: 52.1 t ADT: 30
260th Street
FairOver: W. Fork of Vermillion Rv
7S & 0.3E of Salem, McCook, SD
Built 2007 Load: 52.1 t ADT: 50
I029 S
FairOver: ELLIS AND EASTERN RR
0.3 N 12TH ST INTERCH, Minnehaha, SD
Built 2004 Load: 52.2 t ADT: 30,330
SD044
FairOver: CAMP CK
3.1 E JCT SD 19, Turner, SD
Built 1968 Load: 52.4 t ADT: 1,034
I090
FairOver: NORTH BR MORRIS CK
0.7 NW TILFORD INTERCH, Meade, SD
Built 1956 Load: 52.5 t ADT: 18,420
SD034 W
FairOver: JAMES RV
0.9 SE OF FORESTBURG, Sanborn, SD
Built 2003 Load: 52.5 t ADT: 1,253
SD034 E
FairOver: JAMES RV
0.9 SE OF FORESTBURG, Sanborn, SD
Built 2004 Load: 52.5 t ADT: 1,253
480 AVENUE
FairOver: CK
2W & 0.8N ALBEE, Grant, SD
Built 2001 Load: 52.6 t ADT: 25
IRR SD063
FairOver: RUDEY CK
10.2 N HAAKON CO LINE, Ziebach, SD
Built 1993 Load: 52.6 t ADT: 656
SAGE CREEK ROAD
FairOver: CK
1.8E 1.0N SCENIC, Pennington, SD
Built 1959 Load: 52.9 t ADT: 160
SD015
FairOver: CK
0.3 N JCT SD 22, Deuel, SD
Built 1994 Load: 53.1 t ADT: 2,219
I029 N
FairOver: ELLIS AND EASTERN RR
0.3 N 12TH ST INTERCH, Minnehaha, SD
Built 2004 Load: 53.3 t ADT: 30,330
US016A
FairOver: DRAW
1.9 S JCT SD 244, Pennington, SD
Built 1992 Load: 53.3 t ADT: 582
SD044
FairOver: RAPID CK
1.1 E JCT US 16, Pennington, SD
Built 1952 Load: 53.3 t ADT: 17,360
US085
FairOver: WHITEWOOD CK
0.1 NE JCT US 385, Lawrence, SD
Built 1993 Load: 53.5 t ADT: 6,526
SD049
FairOver: BLACK DOG CK
0.3 SW LYMAN CO LINE, Tripp, SD
Built 1964 Load: 53.5 t ADT: 376
US014
FairOver: REDSTONE CK
7.2 E BEADLE CO LINE, Kingsbury, SD
Built 1987 Load: 53.7 t ADT: 1,631
US018, SER RD
FairOver: CK
1.8 W OF WINNER, Tripp, SD
Built 1965 Load: 53.7 t ADT: 2,820
US014 W
FairOver: NORTH DEER CK
3.9 MI EAST OF VOLGA, Brookings, SD
Built 2001 Load: 54.0 t ADT: 4,096
SD224
FairOver: DRY RUN CK
0.7 E JERAULD CO LINE, Sanborn, SD
Built 1962 Load: 54.1 t ADT: 1,126
I090
FairOver: HIGGINS GULCH
1 W US 85 INTERCH, Lawrence, SD
Built 1974 Load: 54.2 t ADT: 7,640
SD037 N
FairOver: LAKE MITCHELL SPILLWAY
2.7 N JCT I 90 LOOP, Davison, SD
Built 1960 Load: 54.4 t ADT: 2,460
US016
FairOver: SPRING CK
1.8 W JCT US 385, Pennington, SD
Built 1986 Load: 54.4 t ADT: 6,231
47260 311 ST
FairOver: CK
13S & 0.6E BERESFORD, Union, SD
Built 1991 Load: 54.4 t ADT: 30
US085
FairOver: MILLER CK
0.3 S I 90 INTERCH, Lawrence, SD
Built 1971 Load: 54.6 t ADT: 5,754
254TH ST, HWY 122
FairOver: SLIP-UP CK
1.0S & 6.7W GARRETSON, Minnehaha, SD
Built 2015 Load: 54.8 t ADT: 736
SAGE CREEK ROAD
FairOver: BEAR CK
1.6E 0.9N SENIC, Pennington, SD
Built 1959 Load: 55.0 t ADT: 160
SD019
FairOver: HURLEY CK
2 N JCT US 18 EAST, Turner, SD
Built 1965 Load: 55.1 t ADT: 1,212
US212
FairOver: CK
5.8 SW MEADE CO LINE, Butte, SD
Built 1956 Load: 55.2 t ADT: 494
Sertoma Avenue
FairOver: Trib to Skunk Creek
0.3S of 12th Street, Minnehaha, SD
Built 1996 Load: 55.2 t ADT: 30
IRR SD063
FairOver: OAK CK
1.8 N OF MCLAUGHLIN, Corson, SD
Built 1980 Load: 55.3 t ADT: 875
US014 E
FairOver: NORTH DEER CK
3.9 E OF VOLGA, Brookings, SD
Built 1978 Load: 55.9 t ADT: 4,096
SD028
FairOver: BR SHUE CK
2.8 E SPINK CO LINE, Clark, SD
Built 2016 Load: 55.9 t ADT: 334
CAMBELL ST
FairOver: CK
1.8 N JCT US 16B, Pennington, SD
Built 1964 Load: 56.7 t ADT: 23,179
SD079
FairOver: SOUTH BR DRY CK
2.8 N NEWELL & JCT 212 E, Butte, SD
Built 1962 Load: 56.9 t ADT: 786
244 ST
FairOver: EAST FORK VERMILLION RV
2.4W & 3.0S ORLAND, Lake, SD
Built 2005 Load: 57.2 t ADT: 35
146th Street
FairOver: Snake Creek
2.0N & 7.4W of Mansfield, Brown, SD
Built 2004 Load: 57.3 t ADT: 98
I229
FairOver: CK
0.2 SW SD 115 INTERCH, Minnehaha, SD
Built 1959 Load: 57.3 t ADT: 43,830
US085
FairOver: CK
10 N OF BELLE FOURCHE, Butte, SD
Built 1966 Load: 57.4 t ADT: 1,551
I090
FairOver: BR BIG BUFFALO CK
2.5 E SD 240 S INTERCH, Jackson, SD
Built 1968 Load: 57.6 t ADT: 6,560
I090
FairOver: CK
2 SE US 14 & I90 INTERCH, Pennington, SD
Built 1958 Load: 57.8 t ADT: 6,270
470 AVENUE
FairOver: CK
5.3E & 0.2N MARVIN, Grant, SD
Built 2001 Load: 58.1 t ADT: 95
US212
FairOver: BELLE FOURCHE RV
5.7 E JCT US 85, Butte, SD
Built 2002 Load: 58.4 t ADT: 1,740
SD027
FairOver: MUD CK
8.9 S MARSHALL CO LINE, Day, SD
Built 1970 Load: 58.9 t ADT: 253
SD027
FairOver: CK
4.7 S MARSHALL CO LINE, Day, SD
Built 1970 Load: 59.4 t ADT: 518
SD079
FairOver: SOUTH CANAL
0.6 S BUTTE CO LINE, Meade, SD
Built 1954 Load: 59.5 t ADT: 2,199
US016A
FairOver: GRACE COOLIDGE CK
0.1 N JCT SD 36 E, Custer, SD
Built 1986 Load: 59.8 t ADT: 534
I090
FairOver: RCP&E RR
3.6 E WASTA INTERCH, Pennington, SD
Built 1996 Load: 60.1 t ADT: 7,370
US018
FairOver: DE BELL CK
1.2 E TODD CO LINE, Tripp, SD
Built 1988 Load: 60.1 t ADT: 1,053
US016
FairOver: SPRING CK
1.2 E OF HILL CITY, Pennington, SD
Built 1986 Load: 60.5 t ADT: 6,231
Showing 2,851-2,900 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.