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

392 AVENUE

Poor

Over: SAND CK

3.1S & 0.3W ALPENA, Jerauld, SD

Built 2008 Load: 28.5 t ADT: 25

471ST AVENUE

Poor

Over: CK

5.8S BROOKINGS, Brookings, SD

Built 1925 Load: 28.9 t ADT: 1,305

188 STREET

Poor

Over: HIDEWOOD CK

6N & 1.8E ESTELLINE, Deuel, SD

Built 1978 Load: 29.0 t ADT: 90

SLATE PRAIRIE ROAD

Poor

Over: CASTLE CK

0.5E 1.2N DEERFD DAM, Pennington, SD

Built 1950 Load: 29.9 t ADT: 73

214TH STREET

Poor

Over: BIG SIOUX RV

2S & 3.6W BROOKINGS, Brookings, SD

Built 1962 Load: 30.0 t ADT: 64

McCURDY GULCH

Poor

Over: RAPID CREEK

T 1 N R 5 E SEC 2, Pennington, SD

Built 1945 Load: 30.1 t ADT: 10

SD013

Poor

Over: MEDARY CK

0.8 S JCT US 14, Brookings, SD

Built 1938 Load: 30.7 t ADT: 1,149

IRR SD034

Poor

Over: CHEYENNE RV

ZIEBACH CO LINE, Haakon, SD

Built 1962 Load: 30.8 t ADT: 576

I029 S

Poor

Over: BIG SIOUX RV

1 S BROOKINGS CO LINE, Moody, SD

Built 1966 Load: 30.9 t ADT: 7,880

I029 N

Poor

Over: BIG SIOUX RV

1 S BROOKINGS CO LINE, Moody, SD

Built 1966 Load: 30.9 t ADT: 7,880

248TH ST, HWY 110

Poor

Over: SKUNK CK

3.7E COLTON, Minnehaha, SD

Built 1963 Load: 31.5 t ADT: 607

US014

Poor

Over: BELCHER CK

4.3 E OF PHILIP, Haakon, SD

Built 1955 Load: 31.6 t ADT: 725

IRR SD063

Poor

Over: DUPREE CK

1.7 N HAAKON CO LINE, Ziebach, SD

Built 1961 Load: 31.6 t ADT: 656

S. Cliff Avenue

Poor

Over: Big Sioux River

south of I-229, Minnehaha, SD

Built 1986 Load: 31.7 t ADT: 9,363

CAPITOL AVE

Poor

Over: CAPITOL LAKE OUTLET

CAPITOL AVE PIERRE, Hughes, SD

Built 1950 Load: 32.0 t ADT: 7,155

US018

Poor

Over: JAMES RV

0.6 E OF OLIVET, Hutchinson, SD

Built 1956 Load: 32.0 t ADT: 707

487TH AVE, HWY 103

Poor

Over: BEAVER CREEK

NW CORNER VALLEY SPRINGS, Minnehaha, SD

Built 1967 Load: 32.3 t ADT: 1,006

IRR BIA RTE 2

Poor

Over: POTATO CREEK

8.9 KM WEST OF SD HWY 44, Jackson, SD

Built 1942 Load: 32.4 t ADT: 1,314

464th Avenue

Poor

Over: Blind Creek

7W & 1.6N of Beresford, Lincoln, SD

Built 1941 Load: 32.4 t ADT: 80

409TH AVE

Poor

Over: CREEK

3E & 1.6S DOLAND, Spink, SD

Built 1945 Load: 32.4 t ADT: 50

173RD STREET

Poor

Over: CREEK

4.5E & 1S DOLAND, Spink, SD

Built 1935 Load: 32.4 t ADT: 31

SD034

Poor

Over: CHAPELLE CK

22.5 E JCT US 14 & 83, Hughes, SD

Built 1949 Load: 33.3 t ADT: 658

THUNDERHEAD FALLS

Poor

Over: RAPID CK

1.0E 2.0S JOHNSON SD, Pennington, SD

Built 1972 Load: 33.3 t ADT: 62

159TH ST

Poor

Over: CREEK

5.0S 0.5W NORTHVILLE, Spink, SD

Built 1930 Load: 34.0 t ADT: 12

328TH AVENUE

Poor

Over: SOUTH MEDICINE CK

1.2 S HOLABIRD, Hyde, SD

Built 1967 Load: 34.3 t ADT: 90

SD011

Poor

Over: WEST PIPESTONE CK

2.9 N I 90 INTERCH, Minnehaha, SD

Built 1953 Load: 34.6 t ADT: 3,797

CHAPEL LANE

Poor

Over: RAPID CK

CHAPEL LANE & SD44 - RC, Pennington, SD

Built 1974 Load: 35.8 t ADT: 4,700

464TH AVENUE

Poor

Over: CK

5.9S VOLGA, Brookings, SD

Built 1950 Load: 35.9 t ADT: 198

361ST AVE

Poor

Over: NORTH FORK SNAKE CK

0.5W & 0.1S CRESBARD, Faulk, SD

Built 1979 Load: 35.9 t ADT: 136

258TH ST, HWY 130

Poor

Over: BIG SIOUX RIVER

1.6W RENNER, Minnehaha, SD

Built 1966 Load: 36.0 t ADT: 2,419

IRR US012

Poor

Over: CLAYMORE CK

2.4 W WALWORTH CO LINE, Corson, SD

Built 1958 Load: 37.2 t ADT: 1,392

THUNDERHEAD FALLS

Poor

Over: RAPID CK

1.2E 1.4S JOHNSON SIDING, Pennington, SD

Built 1972 Load: 38.8 t ADT: 218

142nd Street

Poor

Over: Snake Creek

11.1W of Warner, Edmunds, SD

Built 1959 Load: 39.4 t ADT: 150

US014

Poor

Over: JAMES RV

1.3 E JCT SD 37, Beadle, SD

Built 1960 Load: 40.7 t ADT: 3,619

45560 288TH ST

Poor

Over: CK

3N & 0.4W VIBORG, Turner, SD

Built 2001 Load: 40.9 t ADT: 30

28820 463 AVE

Poor

Over: VERMILLION RV

2E & 3.2S DAVIS, Turner, SD

Built 1970 Load: 41.4 t ADT: 97

SD037

Poor

Over: MISSOURI RIVER

1.5NE NIOBRARA, Bon Homme, SD

Built 1996 Load: 42.6 t ADT: 830

Benson Road

Poor

Over: Big Sioux Diversion

east of Minnesota Avenue, Minnehaha, SD

Built 1999 Load: 45.2 t ADT: 9,273

47460 304 STR.

Poor

Over: BRULE CK

6S & 2.6E BERESFORD, Union, SD

Built 1987 Load: 45.5 t ADT: 40

US385

Poor

Over: HORSE CK

3.6 N JCT US 16 E, Pennington, SD

Built 1947 Load: 49.9 t ADT: 2,610

SD022

Poor

Over: CK

5.3 E I 29 INTERCH, Deuel, SD

Built 1959 Load: 50.9 t ADT: 1,723

SD049

Poor

Over: CK

7 S OF HAMILL, Tripp, SD

Built 1972 Load: 51.5 t ADT: 509

31160 UNIVER. ROAD

Poor

Over: VERMILLION RV

1.2E & 6N VERMILLION, Clay, SD

Built 1973 Load: 51.6 t ADT: 297

NEMO ROAD

Poor

Over: BOXELDER CK

1.3N 2.5W OF NEMO, Lawrence, SD

Built 1975 Load: 52.6 t ADT: 300

ARPAN RD

Poor

Over: SOUTH CANAL

11 WEST NEWELL, Butte, SD

Built 1975 Load: 52.9 t ADT: 269

29020 453 AVE

Poor

Over: CK

3W & 0.8N VIBORG, Turner, SD

Built 1999 Load: 59.1 t ADT: 100

US014A

Poor

Over: ICE BOX CK

0.2 E CHEYENNE XING, Lawrence, SD

Built 1964 Load: 61.7 t ADT: 1,447

47320 305 STR

Poor

Over: BRULE CK

7S & 2.2E BERESFORD, Union, SD

Built 1989 Load: 64.4 t ADT: 40

212TH STREET

Poor

Over: CK

1S & 3.7E VOLGA, Brookings, SD

Built 1930 Load: 65.7 t ADT: 92

US012

Poor

Over: CK

4.2 E OF IPSWICH, Edmunds, SD

Built 1974 Load: 67.6 t ADT: 2,882

Showing 5,851-5,900 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.