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

27220 444 AVE

Poor

Over: CK

0.8N & 3W MARION, Turner, SD

Built 1950 Load: 24.5 t ADT: 100

44960 274 ST

Poor

Over: WEST FORK VERMILLION RV

1N & 3.2W PARKER, Turner, SD

Built 1992 Load: 24.5 t ADT: 97

45380 271 ST

Poor

Over: EAST FORK VERMILLION RV

4N & 0.8E PARKER, Turner, SD

Built 1950 Load: 24.5 t ADT: 50

46220 275 ST

Poor

Over: LONG CK

2N & 1.2E CHANCELLOR, Turner, SD

Built 1977 Load: 24.5 t ADT: 570

46360 277 ST

Poor

Over: LONG CK

2.6E CHANCELLOR, Turner, SD

Built 1987 Load: 24.5 t ADT: 25

32200 477TH AVE

Poor

Over: CK

1E & 2N ELK POINT, Union, SD

Built 1968 Load: 24.5 t ADT: 40

48480 CO HWY 13

Poor

Over: GREEN CK

1.8S & 5.8E ALCESTER, Union, SD

Built 1985 Load: 24.5 t ADT: 500

45170 313 ST

Poor

Over: Unnamed Creek

7 S & 0.7 E Volin, Yankton, SD

Built 1940 Load: 24.5 t ADT: 45

MEADOWLAND ST

Poor

Over: DIVERSION DITCH

4.4S & 0.1W BALTIC, Minnehaha, SD

Built 1948 Load: 24.7 t ADT: 26

YOUNGBERG RD

Poor

Over: DRY CK

2.8 S 3 E NEWELL, Butte, SD

Built 1945 Load: 24.8 t ADT: 32

266TH STREET

Poor

Over: TRIB TO SKUNK CK

2.2S & 1.3W ELLIS, Minnehaha, SD

Built 1952 Load: 24.8 t ADT: 78

FAS 3214

Poor

Over: DAN POWELL CK

8.5 W JCT US 83, Stanley, SD

Built 1936 Load: 24.8 t ADT: 210

IRR BIA RTE 3

Poor

Over: LITTLE WHITE RIVER

IN GHOST HAWK PARK, Todd, SD

Built 1964 Load: 24.8 t ADT: 44

IRR US012

Poor

Over: BR SNAKE CK

1.7 NW JCT SD 20, Corson, SD

Built 1965 Load: 24.9 t ADT: 1,102

NORRIS PEAK ROAD

Poor

Over: RAPID CK

JOHNSON'S SIDING, Pennington, SD

Built 1973 Load: 24.9 t ADT: 654

SD020 P

Poor

Over: CK

NORTH LAKE KAMPESKA, Codington, SD

Built 1931 Load: 25.1 t ADT: 56

US014 EF

Poor

Over: LONE TREE CK

3.2 S STANLEY CO LINE, Haakon, SD

Built 1920 Load: 25.1 t ADT: 50

SD037

Poor

Over: CK

7.8 N JCT US 212, Spink, SD

Built 1958 Load: 25.1 t ADT: 446

230 STREET

Poor

Over: FIRESTEEL CK

1S 3W LANE, Jerauld, SD

Built 1937 Load: 25.2 t ADT: 20

COUNTY RD

Poor

Over: SAND CK

2N & 1.6W FORESTBURG, Sanborn, SD

Built 1940 Load: 25.3 t ADT: 70

IRR US018

Poor

Over: CREEK

DOUGLAS/CHARLES MIX CO LN, Douglas, SD

Built 1961 Load: 25.8 t ADT: 588

WAYNE AVENUE

Poor

Over: TRIB TO SKUNK CK

3.4S & 1.5W ELLIS, Minnehaha, SD

Built 1940 Load: 25.9 t ADT: 56

472ND AVE, HWY 133

Poor

Over: TRIB TO BIG SIOUX RV

2E & 0.4S CROOKS, Minnehaha, SD

Built 1955 Load: 25.9 t ADT: 1,204

45340 272 ST

Poor

Over: CK

3N & 0.3E PARKER, Turner, SD

Built 1939 Load: 26.1 t ADT: 35

45370 277TH ST

Poor

Over: CK

2S & 0.7E PARKER, Turner, SD

Built 1940 Load: 26.1 t ADT: 50

365TH AVE

Poor

Over: CK

1.2N DANFORTH, Hand, SD

Built 1930 Load: 26.2 t ADT: 59

176 STREET

Poor

Over: BIG SIOUX RV

4.0S 2.6E WATERTOWN, Codington, SD

Built 1971 Load: 26.3 t ADT: 468

I-90 SERVICE ROAD

Poor

Over: CROW CK

1.5 E WY STATE LINE, Lawrence, SD

Built 1940 Load: 26.4 t ADT: 1,500

256TH STREET

Poor

Over: WEST PIPESTONE CREEK

4N & 0.4W CORSON, Minnehaha, SD

Built 1940 Load: 26.5 t ADT: 76

48020 309 STR.

Poor

Over: EAST UNION CK

7.5S & 1.2E ALCESTER, Union, SD

Built 1950 Load: 26.8 t ADT: 45

TIDEWATER RD.

Poor

Over: WHITE OWL CK

14.0E & 5.2N UNION CENTER, Meade, SD

Built 1945 Load: 26.9 t ADT: 33

257TH STREET

Poor

Over: WEST PIPESTONE CREEK

3N & 0.2W CORSON, Minnehaha, SD

Built 1940 Load: 27.0 t ADT: 71

IRR BIA RTE 2

Poor

Over: RED WATER CREEK

8.5 KM E OF SD HWY 63, Dewey, SD

Built 1961 Load: 27.2 t ADT: 180

US014 EF

Poor

Over: PRAIRIE DOG CK

7.8 S JCT SD 34, Stanley, SD

Built 1920 Load: 27.2 t ADT: 50

US014 EF

Poor

Over: LITTLE PRAIRIE DOG CK

1.9 N HAAKON CO LINE, Stanley, SD

Built 1920 Load: 27.2 t ADT: 50

215 STREET

Poor

Over: WEST FORK ELM CK

1N 1.2W STEPHAN, Hyde, SD

Built 1928 Load: 27.3 t ADT: 65

159TH STREET

Poor

Over: CREEK

9.2W & 2N TURTON, Spink, SD

Built 1950 Load: 27.3 t ADT: 31

SD050

Poor

Over: R&W RR

2.7 N I 90 INTERCH, Brule, SD

Built 1952 Load: 27.4 t ADT: 4,554

407TH AVENUE

Poor

Over: NORTH BR TWELVE MILE CK

2 W & 10.2S MITCHELL, Davison, SD

Built 1930 Load: 27.5 t ADT: 64

River Boulevard

Poor

Over: Big Sioux River

W of Southeastern Avenue, Minnehaha, SD

Built 1975 Load: 27.5 t ADT: 5,300

STAE HIGHWAY 1806

Poor

Over: OAHE DAM SPILLWAY

5 Miles No. of Ft. Pierre, Stanley, SD

Built 1963 Load: 27.5 t ADT: 123

GRAND VIEW MEADOW

Poor

Over: COLTON CK

1.9S & 2.1W LYONS, Minnehaha, SD

Built 1940 Load: 27.7 t ADT: 70

STONEVILLE RD.

Poor

Over: CK

11.8 S US 212, Meade, SD

Built 1970 Load: 27.8 t ADT: 233

343RD AVE

Poor

Over: SOUTH FORK SNAKE CK

9W FAULKTON, Faulk, SD

Built 1930 Load: 27.9 t ADT: 60

US212

Poor

Over: SOUTH FORK SNAKE CK

1 W OF FAULKTON, Faulk, SD

Built 1939 Load: 27.9 t ADT: 763

326 AVENUE

Poor

Over: SOUTH CHAPELLE CK

2W 11.6S HOLABIRD, Hyde, SD

Built 1920 Load: 27.9 t ADT: 65

IRR US012

Poor

Over: HAY CK

1.3 E OF MORRISTOWN, Corson, SD

Built 1949 Load: 28.2 t ADT: 436

372ND AVE

Poor

Over: DOVE CK

2.1N ZELL, Faulk, SD

Built 1980 Load: 28.2 t ADT: 205

471ST STREET

Poor

Over: NORTH DEER CK

10.4N BROOKINGS, Brookings, SD

Built 1925 Load: 28.3 t ADT: 462

US012

Poor

Over: MOCCASIN CK

1.4 E JCT US 281 N, Brown, SD

Built 1954 Load: 28.5 t ADT: 22,327

Showing 5,801-5,850 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.