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

Total Bridges

5,905

Public highway bridges in South Dakota

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

South Dakota34.6%47.8%17.6%GoodFairPoor
Bridge inventory deck-condition mix - South Dakota (FHWA NBI)

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
Structure
Progressive
Burden @ $100K
$59

WV

West Virginia

16.02% top marginal rate
Structure
Progressive
Burden @ $100K
$7,679
Selected

SD

South Dakota

16.24% top marginal rate
Structure
Progressive
Burden @ $100K
$5,905

IA

Iowa

20.01% top marginal rate
Structure
Progressive
Burden @ $100K
$20,753

VI

Virgin Islands

29.17% top marginal rate
Structure
Progressive
Burden @ $100K
$24

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

Poor

Over: WHETSTONE RV

4.8E & 3.2N MILBANK, Grant, SD

Built 1962 Load: 0.9 t ADT: 25

202ND ST.

Poor

Over: BEAR BUTTE CK

5.3E BEAR BUTTE, Meade, SD

Built 2000 Load: 0.9 t ADT: 50

45980 303 ST.

Poor

Over: VERMILLION RV

6S & 7.8E IRENE, Clay, SD

Built 1909 Load: 1.8 t ADT: 15

460th Avenue

Poor

Over: Big Coulee Creek

4S & 2W of Peever, Roberts, SD

Built 1950 Load: 2.2 t ADT: 22

197TH ST

Poor

Over: TURTLE CK

1N & 1E ST LAWRENCE, Hand, SD

Built 1925 Load: 2.5 t ADT: 25

242 ST

Poor

Over: CK

1.8E 11.0N PLANKINTON, Aurora, SD

Built 1917 Load: 2.7 t ADT: 101

All Bridges in South Dakota

425TH AVE

Poor

Over: CK

2 E .1 S BANCROFT, Kingsbury, SD

Built 1935 Load: 14.2 t ADT: 95

ANTELOPE CREEK RD.

Poor

Over: ELK CK

24E & 13.5S STURGIS, Meade, SD

Built 1976 Load: 14.2 t ADT: 56

222 ST

Poor

Over: WEST REDSTONE CK

5.5W CARTHAGE, Miner, SD

Built 1930 Load: 14.2 t ADT: 148

FOSTER ROAD

Poor

Over: THUNDER BUTTE CK

15.9E 12.4S BISON, Perkins, SD

Built 1975 Load: 14.2 t ADT: 27

241 ST

Poor

Over: JAMES RV

7.4E LETCHER, Sanborn, SD

Built 1973 Load: 14.2 t ADT: 16

41260 306th Street

Poor

Over: Emanuel Creek

2S & 3.4W of Tyndall, Bon Homme, SD

Built 1970 Load: 14.3 t ADT: 60

475TH AVENUE

Poor

Over: MEDARY CK

1.8S & 1W AURORA, Brookings, SD

Built 1930 Load: 14.3 t ADT: 92

213TH STREET

Poor

Over: CK

2.8E & 1.0 N AURORA, Brookings, SD

Built 1930 Load: 14.3 t ADT: 50

230 ST

Poor

Over: CROW CK

1.5S & 17.4W WSSGTN SPRGS, Jerauld, SD

Built 2002 Load: 14.3 t ADT: 35

Township Road

Poor

Over: Dirt Lodge Creek

2.2E & 12.9S WATAUGA, Corson, SD

Built 1932 Load: 14.4 t ADT: 30

47880 306 STR.

Poor

Over: CK

5S & 0.2W ALCESTER, Union, SD

Built 1950 Load: 14.4 t ADT: 45

408TH AVENUE

Poor

Over: SOUTH FORK TWELVE MILE C

1W & 13.7 S MITCHELL, Davison, SD

Built 1930 Load: 14.5 t ADT: 81

COUNTY RD

Poor

Over: FALL RV

3.2E & 1.8S HOT SPRINGS, Fall River, SD

Built 1932 Load: 14.5 t ADT: 41

456 AVENUE

Poor

Over: Indian River

3.1 MI S & 8 W OF MARVIN, Grant, SD

Built 1960 Load: 14.5 t ADT: 35

206th AVENUE

Poor

Over: COTTONWOOD CK

4W & 1.2N COTTONWOOD, Jackson, SD

Built 1940 Load: 14.5 t ADT: 10

468th Avenue

Poor

Over: Creek

1.8S & 0.3E of Wilmot, Roberts, SD

Built 1901 Load: 14.5 t ADT: 50

30600 476 AVE.

Poor

Over: CK

8S & 4E BERESFORD, Union, SD

Built 1965 Load: 14.5 t ADT: 25

32201 478TH AVE.

Poor

Over: Lewis Ditch

2E & 1.9N ELK POINT, Union, SD

Built 1940 Load: 14.5 t ADT: 40

467th Avenue

Poor

Over: Saddle Creek

1E & 9.3S of Lennox, Lincoln, SD

Built 1972 Load: 14.6 t ADT: 25

469th Avenue

Poor

Over: Tributary to Ash Creek

2W & 0.3N of Beresford, Lincoln, SD

Built 1935 Load: 14.6 t ADT: 261

476th Avenue

Poor

Over: Trib. to W Brule Creek

4E & 0.7N of Beresford, Lincoln, SD

Built 1940 Load: 14.6 t ADT: 137

293rd Street

Poor

Over: Pattee Creek

1N & 2.1W of Hudson, Lincoln, SD

Built 1970 Load: 14.6 t ADT: 35

FT MEADE RECREATIO

Poor

Over: Alkali Creek

3.5 mi SE of Sturgis, SD, Meade, SD

Built 2008 Load: 14.6 t ADT: 25

43160 307th Street

Poor

Over: Marne Creek

3S & 3.4W of Utica, Yankton, SD

Built 1930 Load: 14.6 t ADT: 10

219TH STREET

Poor

Over: CK

1.1E & 7S BROOKINGS, Brookings, SD

Built 1977 Load: 14.7 t ADT: 108

209TH STREET

Poor

Over: SIX MILE CK

3N & 2.3E BROOKINGS, Brookings, SD

Built 1967 Load: 14.7 t ADT: 99

200TH STREET

Poor

Over: SIXMILE CK

3.5N & 0.8E WHITE, Brookings, SD

Built 1966 Load: 14.7 t ADT: 127

486TH AVENUE

Poor

Over: CK

3.2N & 8E BUSHNELL, Brookings, SD

Built 1961 Load: 14.7 t ADT: 175

46080 313 ST.

Poor

Over: CLAY CK

0.8N & 3.8E MECKLING, Clay, SD

Built 1983 Load: 14.7 t ADT: 125

201 ST

Poor

Over: CK

3 S & 2.7 W MILLER, Hand, SD

Built 1926 Load: 14.7 t ADT: 10

369 AVE

Poor

Over: CK

1 E & 6.2 S ROCKHAM, Hand, SD

Built 1935 Load: 14.7 t ADT: 10

314 AVENUE

Poor

Over: SOUTH MEDICINE CK

5.0E & 0.4N BLUNT, Hughes, SD

Built 1961 Load: 14.7 t ADT: 13

27260 418 AVE.

Poor

Over: PONY CK

1.9W 0.6N MILLTOWN, Hutchinson, SD

Built 1939 Load: 14.7 t ADT: 81

203RD ST

Poor

Over: SOUTH FORK PEARL CK

5 N & 0.6 E IROQUOIS, Kingsbury, SD

Built 1930 Load: 14.7 t ADT: 15

212TH ST

Poor

Over: LAKE WHITEWOOD

3.7S 0.5E LK PRESTON, Kingsbury, SD

Built 1978 Load: 14.7 t ADT: 104

164TH STREET

Poor

Over: TIMBER CREEK

8N & 4.8W DOLAND, Spink, SD

Built 1940 Load: 14.7 t ADT: 9

28320 445TH AVE

Poor

Over: TURKEY RIDGE CK

2W & 9.2S MARION, Turner, SD

Built 1945 Load: 14.7 t ADT: 60

28120 449 AVE

Poor

Over: DRAINAGE DITCH

2E & 7.2S MARION, Turner, SD

Built 1930 Load: 14.7 t ADT: 10

CEDAR STREET

Poor

Over: MARNE CREEK

CEDAR STREET - YANKTON, Yankton, SD

Built 1978 Load: 14.7 t ADT: 969

218th Street

Poor

Over: Creek

4.5S & 8.3W of Virgil, Beadle, SD

Built 1935 Load: 14.8 t ADT: 56

207TH STREET

Poor

Over: CK

10N & 1.4W ELKTON, Brookings, SD

Built 1950 Load: 14.8 t ADT: 65

Hanson Avenue

Poor

Over: MITCHELL CK

6.2 W & 7.9 N MIDLAND, Haakon, SD

Built 1986 Load: 14.8 t ADT: 28

Cottonwood Road

Poor

Over: COTTONWOOD CK

0.4S COTTONWOOD, Jackson, SD

Built 1936 Load: 15.0 t ADT: 35

247TH STREET

Poor

Over: TRIB TO W PIPESTONE CK

6.8E & 1.3S DELL RAPIDS, Minnehaha, SD

Built 1950 Load: 15.0 t ADT: 11

414TH AVE

Poor

Over: WEST REDSTONE CK

0.5W 3.5N ARTESIAN, Sanborn, SD

Built 1920 Load: 15.0 t ADT: 56

PLEASANT VALLEY RD

Poor

Over: LANCE CK

22.4W 2.2N FT.PIERRE, Stanley, SD

Built 1930 Load: 15.0 t ADT: 17

277 STREET

Poor

Over: DOG EAR CK

1N WINNER, Tripp, SD

Built 1940 Load: 15.0 t ADT: 50

38450 292nd Street

Poor

Over: Creek

0.2S & 2.5E Lake Andes, Charles Mix, SD

Built 1935 Load: 15.1 t ADT: 48

397th Avenue

Poor

Over: Mud Creek

1E & 3.8S of Stratford, Brown, SD

Built 1930 Load: 15.2 t ADT: 98

ASH STREET

Poor

Over: PONY CK

ASH STREET PARKSTON, Hutchinson, SD

Built 1950 Load: 15.2 t ADT: 317

Showing 5,401-5,450 of 5,905 bridges

Related

All states → | National rankings → | Understanding conditions → | Retired SD term explained →
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.