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
102nd Street
Structurally DeficientOver: Elm Lake
8.5W & 5N of Frederick, Brown, SD
Built 1935 Load: 12.2 t ADT: 33
39460 289th Street
Structurally DeficientOver: Creek
8.0N & 0.4W of Wagner, Charles Mix, SD
Built 1940 Load: 12.2 t ADT: 48
130th Street
Structurally DeficientOver: Snake Creek
10.6E & 4N of Ipswich, Edmunds, SD
Built 1980 Load: 12.2 t ADT: 31
438th Avenue
Structurally DeficientOver: BN Railroad
3.5W & 2.1S of Hazel, Hamlin, SD
Built 1936 Load: 12.2 t ADT: 200
ADAMS STREET
Structurally DeficientOver: CK
ADAMS ST. BLUNT, Hughes, SD
Built 1925 Load: 12.2 t ADT: 20
310 AVENUE
Structurally DeficientOver: NORTH MEDICINE CK
1.0E & 0.5N BLUNT, Hughes, SD
Built 1934 Load: 12.2 t ADT: 33
41840 280 ST.
Structurally DeficientOver: DRY CK
4S & 8.4E PARKSTON, Hutchinson, SD
Built 1941 Load: 12.2 t ADT: 69
41910 283 ST.
Structurally DeficientOver: LONETREE CK
7.0S,9.1E PARKSTON, Hutchinson, SD
Built 1964 Load: 12.2 t ADT: 26
286th Street
Structurally DeficientOver: Long Creek
7S & 0.5W of Lennox, Lincoln, SD
Built 1940 Load: 12.2 t ADT: 30
468th Avenue
Structurally DeficientOver: Snake Creek
7.7S & 2E of Lennox, Lincoln, SD
Built 1935 Load: 12.2 t ADT: 56
304th Avenue
Structurally DeficientOver: Creek
1W & 13.1N of Presho, Lyman, SD
Built 1966 Load: 12.2 t ADT: 10
237th Street
Structurally DeficientOver: Big Sioux River
3.5S & 2.6W of Egan, Moody, SD
Built 1976 Load: 12.2 t ADT: 35
BENNET ROAD
Structurally DeficientOver: BOXELDER CK
.5N1E STPAT EXIT BOXELDER, Pennington, SD
Built 1973 Load: 12.2 t ADT: 881
118th Street
Structurally DeficientOver: Little Minnesota River
2.5E & 0.5N of Sisseton, Roberts, SD
Built 1939 Load: 12.2 t ADT: 68
468th Avenue
Structurally DeficientOver: Jim Creek
10E & 0.5S of Sisseton, Roberts, SD
Built 1965 Load: 12.2 t ADT: 175
104th Street
Structurally DeficientOver: Creek
4.5E & 1N of Rosholt, Roberts, SD
Built 1940 Load: 12.2 t ADT: 25
186th Street
Structurally DeficientOver: FOSTER CREEK
4N & 0.4W BLOOMFIELD, Spink, SD
Built 1915 Load: 12.2 t ADT: 31
45860 278 ST
Structurally DeficientOver: VERMILLION RV
1S & 2.3W CHANCELLOR, Turner, SD
Built 1940 Load: 12.2 t ADT: 65
30330 472 AVE.
Structurally DeficientOver: CK
5.3S BERESFORD, Union, SD
Built 1973 Load: 12.2 t ADT: 30
47230 305 STR.
Structurally DeficientOver: CK
7S & 0.3E BERESFORD, Union, SD
Built 1987 Load: 12.2 t ADT: 45
47340 306 STR.
Structurally DeficientOver: CK
8S & 1.4E BERESFORD, Union, SD
Built 1948 Load: 12.2 t ADT: 35
31070 476TH AVE
Structurally DeficientOver: CK
4E & 12.7S BERESFORD, Union, SD
Built 1963 Load: 12.2 t ADT: 35
30999 477TH AVE
Structurally DeficientOver: CK
9S & 2W ALCESTER, Union, SD
Built 1989 Load: 12.2 t ADT: 300
30040 478 AVE.
Structurally DeficientOver: DRAINAGE DITCH
0.5W & 0.6N ALCESTER, Union, SD
Built 1983 Load: 12.2 t ADT: 45
47840 300TH ST
Structurally DeficientOver: DRAINAGE DITCH
1N & 0.6W ALCESTER, Union, SD
Built 1997 Load: 12.2 t ADT: 40
44960 296 ST
Structurally DeficientOver: Turkey Creek
2.4 W 1.0 N Irene, Yankton, SD
Built 1979 Load: 12.2 t ADT: 75
133rd Street
Structurally DeficientOver: Creek
2.5S & 1.8E of Pierpont, Day, SD
Built 1935 Load: 12.4 t ADT: 10
210TH STREET
Structurally DeficientOver: REDSTONE CK
5 N & 3.6 E ESMOND, Kingsbury, SD
Built 1950 Load: 12.6 t ADT: 15
318 AVENUE
Structurally DeficientOver: OLD LODGE CK
2E & 6.9N WINNER, Tripp, SD
Built 1987 Load: 12.6 t ADT: 31
368TH AVE
Structurally DeficientOver: LITTLE TURTLE CK
8E & 6.2N MILLER, Hand, SD
Built 1928 Load: 13.0 t ADT: 15
28980 417 AVE.
Structurally DeficientOver: DAWSON CK
1.0 WEST OF KAYLOR, Hutchinson, SD
Built 1991 Load: 13.3 t ADT: 50
143rd Street
Structurally DeficientOver: Mud Creek
1S & 4.4W of Ferney, Brown, SD
Built 1935 Load: 14.0 t ADT: 98
227th Street
Structurally DeficientOver: Bad River
9.8W & 15.7N MURDO, Jones, SD
Built 1918 Load: 14.1 t ADT: 6
FOSTER ROAD
Structurally DeficientOver: THUNDER BUTTE CK
15.9E 12.4S BISON, Perkins, SD
Built 1975 Load: 14.2 t ADT: 27
41260 306th Street
Structurally DeficientOver: Emanuel Creek
2S & 3.4W of Tyndall, Bon Homme, SD
Built 1970 Load: 14.3 t ADT: 60
47880 306 STR.
Structurally DeficientOver: CK
5S & 0.2W ALCESTER, Union, SD
Built 1950 Load: 14.4 t ADT: 45
206th AVENUE
Structurally DeficientOver: COTTONWOOD CK
4W & 1.2N COTTONWOOD, Jackson, SD
Built 1940 Load: 14.5 t ADT: 10
30600 476 AVE.
Structurally DeficientOver: CK
8S & 4E BERESFORD, Union, SD
Built 1965 Load: 14.5 t ADT: 25
293rd Street
Structurally DeficientOver: Pattee Creek
1N & 2.1W of Hudson, Lincoln, SD
Built 1970 Load: 14.6 t ADT: 35
FT MEADE RECREATIO
Structurally DeficientOver: Alkali Creek
3.5 mi SE of Sturgis, SD, Meade, SD
Built 2008 Load: 14.6 t ADT: 25
314 AVENUE
Structurally DeficientOver: SOUTH MEDICINE CK
5.0E & 0.4N BLUNT, Hughes, SD
Built 1961 Load: 14.7 t ADT: 13
27260 418 AVE.
Structurally DeficientOver: PONY CK
1.9W 0.6N MILLTOWN, Hutchinson, SD
Built 1939 Load: 14.7 t ADT: 81
28120 449 AVE
Structurally DeficientOver: DRAINAGE DITCH
2E & 7.2S MARION, Turner, SD
Built 1930 Load: 14.7 t ADT: 10
CEDAR STREET
Structurally DeficientOver: MARNE CREEK
CEDAR STREET - YANKTON, Yankton, SD
Built 1978 Load: 14.7 t ADT: 969
218th Street
Structurally DeficientOver: Creek
4.5S & 8.3W of Virgil, Beadle, SD
Built 1935 Load: 14.8 t ADT: 56
247TH STREET
Structurally DeficientOver: TRIB TO W PIPESTONE CK
6.8E & 1.3S DELL RAPIDS, Minnehaha, SD
Built 1950 Load: 15.0 t ADT: 11
PLEASANT VALLEY RD
Structurally DeficientOver: LANCE CK
22.4W 2.2N FT.PIERRE, Stanley, SD
Built 1930 Load: 15.0 t ADT: 17
277 STREET
Structurally DeficientOver: DOG EAR CK
1N WINNER, Tripp, SD
Built 1940 Load: 15.0 t ADT: 50
29210 421st Avenue
Structurally DeficientOver: Dawson Creek
3W & 0.1S of Scotland, Bon Homme, SD
Built 1925 Load: 15.4 t ADT: 56
287 STREET
Structurally DeficientOver: CK
1.8E 1.2S COLOME, Tripp, SD
Built 1935 Load: 15.7 t ADT: 55
Showing 5,801-5,850 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 |