Total Bridges
5,905
Public highway bridges in South Dakota
State profile · Above national median SD
South Dakota bridge safety
Condition ratings, load ratings, and structural-deficiency data for every public highway bridge in South Dakota — drawn straight from the FHWA National Bridge Inventory.
- 5,905
- Public bridges
- 31.9%
- Good condition
- 16.2%
- Poor condition
- 16.2%
- Structurally deficient
Good Condition
31.9%
1,885 bridges rated 7-9
-18.1pp vs 50% benchmark
Poor Condition
16.2%
959 bridges rated 0-4
Structurally Deficient
16.2%
959 bridges flagged for repair priority
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 — Structurally deficient share 54.1%
National avg
Lower is better. Bar maxes at 30% (worst-state ceiling). National average sits at 7.0%.
Condition Distribution
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 on the structurally deficient leaderboard (lower share = better)
States are ranked by share of bridges flagged structurally deficient — the FHWA classification for any span where deck, superstructure, or substructure carries a condition rating of 4 or below. Lower percentages indicate stronger maintenance funding and inspection follow-through. States here sit immediately above and below South Dakota on the same metric.
66
Guam
15.25% top marginal rate
54
West Virginia
16.02% top marginal rate
46
South Dakota
16.24% top marginal rate
19
Iowa
20.01% top marginal rate
78
Virgin Islands
29.17% top marginal rate
Bridges Needing Most Attention in South Dakota
Six lowest-condition bridges in South Dakota, ranked by composite NBI rating. Each is inspected at least every 24 months.
483 AVENUE
Structurally DeficientOver: WHETSTONE RV
4.8E & 3.2N MILBANK, Grant, SD
Built 1962 Load: 0.9 t ADT: 25
202ND ST.
Structurally DeficientOver: BEAR BUTTE CK
5.3E BEAR BUTTE, Meade, SD
Built 2000 Load: 0.9 t ADT: 50
45980 303 ST.
Structurally DeficientOver: VERMILLION RV
6S & 7.8E IRENE, Clay, SD
Built 1909 Load: 1.8 t ADT: 15
460th Avenue
Structurally DeficientOver: Big Coulee Creek
4S & 2W of Peever, Roberts, SD
Built 1950 Load: 2.2 t ADT: 22
197TH ST
Structurally DeficientOver: TURTLE CK
1N & 1E ST LAWRENCE, Hand, SD
Built 1925 Load: 2.5 t ADT: 25
242 ST
Structurally DeficientOver: CK
1.8E 11.0N PLANKINTON, Aurora, SD
Built 1917 Load: 2.7 t ADT: 101
All Bridges in South Dakota
434 AVE
FairOver: WEST FORK VERMILLION RV
5.1N HOWARD, Miner, SD
Built 1940 Load: 19.1 t ADT: 45
TWELFTH STREET
FairOver: RAPID CK
0.1N 12TH&OMAHA - RC, Pennington, SD
Built 1973 Load: 19.1 t ADT: 300
ELM AVENUE
FairOver: DRAINAGE DITCH
200S ELM & CENTENNIAL -RC, Pennington, SD
Built 1984 Load: 19.1 t ADT: 300
E MEADE ST&HOEFFER
FairOver: MEADE ST DRAINAGE DITCH
E MEADE & HOEFFER - RC, Pennington, SD
Built 1978 Load: 19.1 t ADT: 400
CHERRY AVE
FairOver: MEADE DITCH
0.25MI S OF ST PATRICK ST, Pennington, SD
Built 1974 Load: 19.1 t ADT: 2
157 AVENUE
FairOver: NORTH FORK MOREAU RV
0.6 SOUTH ZCONA, Perkins, SD
Built 1988 Load: 19.1 t ADT: 263
151 STREET
FairOver: CK
6.5 N 8W LODGEPOLE, Perkins, SD
Built 1977 Load: 19.1 t ADT: 44
PRAIRIE CITY ROAD
FairOver: ANTELOPE CK
17 W 14.7 S BISON, Perkins, SD
Built 1977 Load: 19.1 t ADT: 75
DIVIDE ROAD
FairOver: DUCK CK
14W &11.1N BISON, Perkins, SD
Built 1986 Load: 19.1 t ADT: 38
FOUR MILE ROAD
FairOver: FLAT CK
3E 3.5S WHITE BUTTE, Perkins, SD
Built 1977 Load: 19.1 t ADT: 60
CHANCE ROAD
FairOver: THUNDER BUTTE CK
8.2E & 8.3S BISON, Perkins, SD
Built 1980 Load: 19.1 t ADT: 26
RIEDY ROAD
FairOver: CK
7E 9.2S LEMMON, Perkins, SD
Built 1977 Load: 19.1 t ADT: 17
RUML RD
FairOver: JAMES RV
7.2E & 1.3N LETCHER, Sanborn, SD
Built 1976 Load: 19.1 t ADT: 56
227TH ST.
FairOver: CK
1.3W 9N ARTESIAN, Sanborn, SD
Built 1982 Load: 19.1 t ADT: 25
300 AVENUE
FairOver: CK
3W & 3.8N AGAR, Sully, SD
Built 1981 Load: 19.1 t ADT: 48
308 AVENUE
FairOver: OKOBOJO CK
4E & 0.4S AGAR, Sully, SD
Built 1974 Load: 19.1 t ADT: 25
31800 477TH AVE
FairOver: CK
1.2N JCT SD 50, Union, SD
Built 1948 Load: 19.1 t ADT: 300
170TH ST
FairOver: CK
3S & 1.6E MIRANDA, Faulk, SD
Built 1927 Load: 19.2 t ADT: 25
127th Street
FairOver: Hiddenwood Creek
3N & 2.1E of Selby, Walworth, SD
Built 1954 Load: 19.2 t ADT: 28
41450 Airport Road
FairOver: Creek
0.7N&0.7W of Springfield, Bon Homme, SD
Built 1965 Load: 19.3 t ADT: 233
216 STREET
FairOver: BR ELM CK
1.3 E MAC'S CORNER, Hyde, SD
Built 1957 Load: 19.3 t ADT: 98
SD011
FairOver: SPLIT ROCK CK
2.7 N I 90 INTERCH, Minnehaha, SD
Built 1953 Load: 19.3 t ADT: 3,797
MCHARDY ROAD
FairOver: SPLIT ROCK CREEK
0.1E & 0.5S BRANDON, Minnehaha, SD
Built 1986 Load: 19.3 t ADT: 60
305 AVENUE
FairOver: ARTICHOKE CK
5 W & 5.5 S OF GETTYSBURG, Potter, SD
Built 1998 Load: 19.3 t ADT: 99
215TH STREET
FairOver: REDSTONE CK
3.7 E ESMOND, Kingsbury, SD
Built 1965 Load: 19.4 t ADT: 89
200TH ST
FairOver: CK
3.3 E BADGER, Kingsbury, SD
Built 1955 Load: 19.4 t ADT: 400
152ND ST
FairOver: NORTH FORK SNAKE CK
2.7E JCT SD 20, Faulk, SD
Built 1951 Load: 19.5 t ADT: 144
HORSESHOE RD.
FairOver: ELK CK
14S&21.8E STURGIS, Meade, SD
Built 1950 Load: 19.5 t ADT: 10
S. VALLEY DRIVE
FairOver: RAPID CK
0.6S STPAT ON SO:VAL., Pennington, SD
Built 1978 Load: 19.5 t ADT: 1,947
45670 296TH ST
FairOver: CK
5S & 0.7E VIBORG, Turner, SD
Built 2000 Load: 19.5 t ADT: 97
243 ST
FairOver: CK
1.3 W STORLA, Aurora, SD
Built 1978 Load: 19.6 t ADT: 131
198TH St
FairOver: Unnamed Creek
5.5N 0.4E Yale, Beadle, SD
Built 1926 Load: 19.6 t ADT: 56
205TH STREET
FairOver: BIG SIOUX RV
7N & 6.3W BROOKINGS, Brookings, SD
Built 1970 Load: 19.6 t ADT: 92
465TH AVENUE
FairOver: BIG SIOUX RV
7N & 0.6W BRUCE, Brookings, SD
Built 1970 Load: 19.6 t ADT: 340
197TH STREET
FairOver: CK
15N & 4.8W BROOKINGS, Brookings, SD
Built 1974 Load: 19.6 t ADT: 345
197TH STREET
FairOver: CK
15N & 4.5W BROOKINGS, Brookings, SD
Built 1974 Load: 19.6 t ADT: 48
213TH STREET
FairOver: CK
1S & 4.5W BROOKINGS, Brookings, SD
Built 1992 Load: 19.6 t ADT: 92
213TH STREET
FairOver: BIG SIOUX RV
2S & 3.1W BROOKINGS, Brookings, SD
Built 1987 Load: 19.6 t ADT: 92
197TH STREET
FairOver: CK
15N & 3.6W BROOKINGS, Brookings, SD
Built 1973 Load: 19.6 t ADT: 43
214TH STREET
FairOver: CK
2S & 2.9W BROOKINGS, Brookings, SD
Built 1962 Load: 19.6 t ADT: 63
213TH STREET
FairOver: CK
1S & 2.4W BROOKINGS, Brookings, SD
Built 1980 Load: 19.6 t ADT: 92
469TH AVENUE
FairOver: TRIB NORTH DEER CK
2.0W & 4.9N BROOKINGS, Brookings, SD
Built 2006 Load: 19.6 t ADT: 420
470TH AVENUE
FairOver: BR NORTH DEER CK
5.2N & 1W BROOKING, Brookings, SD
Built 1979 Load: 19.6 t ADT: 92
473RD AVENUE
FairOver: SIX MILE CK
2E & 2.4N BROOKINGS, Brookings, SD
Built 1985 Load: 19.6 t ADT: 92
473RD AVENUE
FairOver: CK
3.3S & 2E BROOKINGS, Brookings, SD
Built 1975 Load: 19.6 t ADT: 92
473RD AVENUE
FairOver: CK
3.8S & 2E BROOKINGS, Brookings, SD
Built 1975 Load: 19.6 t ADT: 92
197TH STREET
FairOver: NORTH DEER CK
15N & 2.7E BROOKINGS, Brookings, SD
Built 1974 Load: 19.6 t ADT: 40
201ST STREET
FairOver: CK
11N & 4.1E BRKGS., Brookings, SD
Built 1974 Load: 19.6 t ADT: 41
203 A STREET
FairOver: CK
1.5W WHITE, Brookings, SD
Built 1930 Load: 19.6 t ADT: 92
478TH AVENUE
FairOver: MEDARY CK
2E & 0.1N AURORA, Brookings, SD
Built 1981 Load: 19.6 t ADT: 92
Showing 801-850 of 5,905 bridges
Data sourced from the FHWA National Bridge Inventory (NBI), latest released cycle. See our methodology for details. Retrieved and formatted by PlainBridges Editorial.
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). A "structurally deficient" rating is a repair-priority signal, not a closure or unsafe-to-cross designation. Consult a qualified civil engineer before making decisions based on this data.
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.
| Publisher | Kiznis Studio |
| Sources | FHWA National Bridge Inventory, public U.S. government datasets |