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

415TH AVE.

Fair

Over: JIM CK

0.5E & 1.5S ARTESIAN, Sanborn, SD

Built 1930 Load: 15.5 t ADT: 56

196th Street

Fair

Over: Pearl Creek

7.5N & 5.4E of Yale, Beadle, SD

Built 1900 Load: 15.6 t ADT: 103

244TH STREET

Fair

Over: SKUNK CK

4N & 4.6E COLTON, Minnehaha, SD

Built 1980 Load: 15.7 t ADT: 64

HUETHER RD.

Fair

Over: TRIB TO CHEYENNE RIVER

2.5W 5.3N CONATA, Pennington, SD

Built 1940 Load: 15.7 t ADT: 15

214th Street

Fair

Over: Cain Creek

2.0E of Virgil, Beadle, SD

Built 1952 Load: 15.8 t ADT: 233

31500 455 AVE

Fair

Over: YANKTON CLAY DITCH

18S & 3E IRENE SD, Clay, SD

Built 1938 Load: 15.8 t ADT: 25

204th Street

Fair

Over: HERMAPHRODITE CK

5N & 1W HWYS 34 & 63, Haakon, SD

Built 1950 Load: 15.8 t ADT: 28

30990 457 AVE.

Fair

Over: CLAY CK DITCH

0.4E & 3.8N MECKLING, Clay, SD

Built 2018 Load: 15.9 t ADT: 91

212TH STREET

Fair

Over: CK

2.9W BROOKINGS, Brookings, SD

Built 1982 Load: 16.0 t ADT: 92

405th Avenue

Fair

Over: Pearl Creek

4W & 8.3S of Cavour, Beadle, SD

Built 1953 Load: 16.1 t ADT: 80

29060 418 AVE.

Fair

Over: DAWSON CK

0.6S KAYLOR, Hutchinson, SD

Built 1953 Load: 16.2 t ADT: 320

42340 287 STR.

Fair

Over: SOUTH BR LONETREE CK

1 S & 2.6 W OLIVET, Hutchinson, SD

Built 1935 Load: 16.2 t ADT: 45

41590 311th Street

Fair

Over: Creek

1N & 1E of Springfield, Bon Homme, SD

Built 1935 Load: 16.3 t ADT: 100

RILEY RD

Fair

Over: INDIAN CK

6.0 W 2.3 N NEWELL, Butte, SD

Built 1950 Load: 16.3 t ADT: 47

27070 392 AVE

Fair

Over: CHOTEAU CK

2.3N & 3E OF CORSICA, Douglas, SD

Built 1978 Load: 16.3 t ADT: 25

Old NE Road

Fair

Over: Unnamed Creek

0.3W CACTUS FLAT, Jackson, SD

Built 1950 Load: 16.3 t ADT: 35

207TH STREET

Fair

Over: BIG SIOUX RV

4N & 0.8E VOLGA, Brookings, SD

Built 1955 Load: 16.5 t ADT: 92

463rd Avenue

Fair

Over: Big Sioux River

2W & 1.6N of Estelline, Hamlin, SD

Built 1953 Load: 16.5 t ADT: 119

47700 300 STR.

Fair

Over: CK

1N & 2W ALCESTER, Union, SD

Built 1982 Load: 16.5 t ADT: 35

474 AVENUE

Fair

Over: SOUTH FORK WHETSTONE RV

4W & 0.4N MILBANK, Grant, SD

Built 1936 Load: 16.6 t ADT: 52

30330 453 AVE

Fair

Over: CK

6.3S & 1E IRENE, Clay, SD

Built 1930 Load: 16.7 t ADT: 97

Township Road

Fair

Over: HAY CREEK

0.8E & 0.2S MORRISTOWN, Corson, SD

Built 1935 Load: 16.7 t ADT: 15

IRR BIA RTE 7

Fair

Over: MOREAU RIVER

.7 KM NORTH OF PROMISE, Dewey, SD

Built 1961 Load: 16.7 t ADT: 105

BRUSHIE CREEK RD.

Fair

Over: CK

12 S 1 W FAITH, Meade, SD

Built 1955 Load: 16.7 t ADT: 29

HWY 1416

Fair

Over: Trib. to Box Elder Creek

8.1E NEW UNDERWOOD, Pennington, SD

Built 1936 Load: 16.7 t ADT: 115

216TH STREET

Fair

Over: CK

4S & 3.3W BROOKINGS, Brookings, SD

Built 1955 Load: 16.8 t ADT: 447

OLD HWY 85

Fair

Over: SPUR CK

6 N 17.4 W HOOVER, Butte, SD

Built 1936 Load: 16.8 t ADT: 21

28540 407 AVE.

Fair

Over: EAST FORK CHOTEAU CK

1.6N,4.5W OF TRIPP, Hutchinson, SD

Built 1940 Load: 16.8 t ADT: 30

241ST STREET

Fair

Over: MORRIS CK

3.9W LETCHER, Sanborn, SD

Built 1930 Load: 16.9 t ADT: 253

FAS 6253

Fair

Over: ASH CK

15 W 5.5 N PHILIP, Haakon, SD

Built 1955 Load: 17.0 t ADT: 48

BIXBY ROAD

Fair

Over: RABBIT CK

5.7 W 10.1 S BISON, Perkins, SD

Built 1963 Load: 17.0 t ADT: 139

295th Ave.

Fair

Over: KEYA PAHA RV

13.2S 8.0E OKREEK, Todd, SD

Built 1948 Load: 17.0 t ADT: 27

STATE PARK RD

Fair

Over: STOCKADE LAKE INLET

3.3E .1N CUSTER, Custer, SD

Built 1997 Load: 17.1 t ADT: 30

STATE PARK RD

Fair

Over: SOUTH SCALP CK

11.4W & 2.0N PICKSTOWN, Gregory, SD

Built 1963 Load: 17.1 t ADT: 50

SD248

Fair

Over: BR MEDICINE CK

1.6 E OF DRAPER, Jones, SD

Built 1941 Load: 17.1 t ADT: 220

227 ST

Fair

Over: REDSTONE CK

5S & 5.7W CARTHAGE, Miner, SD

Built 1929 Load: 17.1 t ADT: 20

US012

Fair

Over: CK

4.0 W JCT US 83 N, Walworth, SD

Built 1965 Load: 17.1 t ADT: 1,389

30780 441st Avenue

Fair

Over: Marne Creek

1.2N &1E of Yankton, Yankton, SD

Built 1964 Load: 17.1 t ADT: 33

164 STREET

Fair

Over: SOUTH FORK YELLOW BANK R

4.2W & 0.5S REVILLO, Grant, SD

Built 1936 Load: 17.2 t ADT: 52

28810 418 AVE.

Fair

Over: SOUTH BR LONETREE CK

1.9N KAYLOR, Hutchinson, SD

Built 1953 Load: 17.2 t ADT: 428

219TH STREET

Fair

Over: REDSTONE CK

4 S & 3.5 E ESMOND, Kingsbury, SD

Built 1963 Load: 17.2 t ADT: 45

29490 395th Avenue

Fair

Over: Choteau Creek

1.1N of Wagner, Charles Mix, SD

Built 1955 Load: 17.3 t ADT: 564

477 AVENUE

Fair

Over: NORTH FORK WHETSTONE RV

6N & 1W MILBANK, Grant, SD

Built 1936 Load: 17.3 t ADT: 52

44760 285 ST

Fair

Over: TURKEY RIDGE CK

11S & 0.6E MARION, Turner, SD

Built 2002 Load: 17.3 t ADT: 50

44790 285TH ST

Fair

Over: TURKEY RIDGE CK

11S & 0.9E MARION, Turner, SD

Built 2002 Load: 17.3 t ADT: 50

43180 302nd Street

Fair

Over: Beaver Creek

2S & 1.8E of Lesterville, Yankton, SD

Built 1937 Load: 17.3 t ADT: 40

39510 284 ST

Fair

Over: CHOTEAU CK

5.9 W. DELMONT, Douglas, SD

Built 1925 Load: 17.4 t ADT: 320

47730 309 STR.

Fair

Over: CK

7.5S & 1.7W ALCESTER, Union, SD

Built 1977 Load: 17.4 t ADT: 180

203RD STREET

Fair

Over: CK

9.7W BRUCE, Brookings, SD

Built 1930 Load: 17.5 t ADT: 92

350 AVENUE

Fair

Over: COON CK

3N & 6E BURKE, Gregory, SD

Built 1949 Load: 17.5 t ADT: 10

Showing 601-650 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.