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
133rd Street
Structurally DeficientOver: Creek
2.2E of Groton, Brown, SD
Built 1935 Load: 16.3 t ADT: 98
471st Avenue
Structurally DeficientOver: Saddle Creek
1W & 7.5S of Worthing, Lincoln, SD
Built 1935 Load: 16.3 t ADT: 45
48050 311TH ST
Structurally DeficientOver: EAST UNION CK
9.5S & 1.5E ALCESTER, Union, SD
Built 1950 Load: 16.3 t ADT: 110
220 STREET
Structurally DeficientOver: CK
1W 1N ALPENA, Jerauld, SD
Built 1930 Load: 16.4 t ADT: 42
463rd Avenue
Structurally DeficientOver: Creek
3.8S & 4W of Wilmot, Roberts, SD
Built 1966 Load: 16.5 t ADT: 30
483RD AVENUE
Structurally DeficientOver: TRIB TO SPLIT ROCK CK
2.9N & 1E CORSON, Minnehaha, SD
Built 1937 Load: 16.8 t ADT: 28
47610 312TH ST
Structurally DeficientOver: CK
3E & 1N SPINK, Union, SD
Built 1992 Load: 17.1 t ADT: 50
321 AVENUE
Structurally DeficientOver: CHAPELLE CK
0.3W & 10.17S HARROLD, Hughes, SD
Built 1963 Load: 17.2 t ADT: 99
WILCOX RD.
Structurally DeficientOver: EAST ELM CK
6.2N & 35.2E STURGIS, Meade, SD
Built 1966 Load: 17.4 t ADT: 15
45520 275 ST
Structurally DeficientOver: WEST FORK VERMILLION RV
2.2E PARKER, Turner, SD
Built 1952 Load: 17.4 t ADT: 758
400TH AVENUE
Structurally DeficientOver: CK
3 E MT VERNON, Davison, SD
Built 1945 Load: 18.1 t ADT: 20
295 STREET
Structurally DeficientOver: CK
14.5W 3.0S MARTIN, Bennett, SD
Built 1932 Load: 18.3 t ADT: 27
30710 406th Avenue
Structurally DeficientOver: Trib. to Choteau Creek
4.1S of Avon, Bon Homme, SD
Built 1930 Load: 18.3 t ADT: 60
THUNDERHEAD FALLS
Structurally DeficientOver: RAPID CK
0.8E 1.8S JOHNSON SD, Pennington, SD
Built 1964 Load: 18.3 t ADT: 62
379TH AVE
Structurally DeficientOver: TURTLE CREEK
5W 2N TULARE, Spink, SD
Built 1920 Load: 18.3 t ADT: 55
410TH AVE
Structurally DeficientOver: CREEK
4E & 2.8N TURTON, Spink, SD
Built 1940 Load: 18.3 t ADT: 33
30430 446th Avenue
Structurally DeficientOver: Unnamed Creek
1.7N & 5W of Volin, Yankton, SD
Built 1941 Load: 18.3 t ADT: 100
29470 381st Avenue
Structurally DeficientOver: Creek
2.7S & 1.0W of Lake Andes, Charles Mix, SD
Built 1979 Load: 18.4 t ADT: 48
402ND AVENUE
Structurally DeficientOver: MORRIS CK (DRY RUN CK)
7 W & 9.3 N MITCHELL, Davison, SD
Built 1960 Load: 18.4 t ADT: 35
253RD STREET
Structurally DeficientOver: TRIB TO W PIPESTONE CK
3.7W GARRETSON, Minnehaha, SD
Built 1937 Load: 18.4 t ADT: 28
FOUR CORNERS ROAD
Structurally DeficientOver: CK
4.0W 0.9S BRIDGER, Ziebach, SD
Built 1930 Load: 18.4 t ADT: 16
257TH STREET
Structurally DeficientOver: SILVER CREEK
1N & 0.3W RENNER, Minnehaha, SD
Built 1938 Load: 18.7 t ADT: 49
DOMINO PL.
Structurally DeficientOver: ELK CK
0.3W & 1.7 N OF PIEDMONT, Meade, SD
Built 1980 Load: 19.1 t ADT: 30
ELMSPRINGS RD.
Structurally DeficientOver: BULL CK
1.8W 4N ELM SPRINGS, Meade, SD
Built 1975 Load: 19.1 t ADT: 60
27150 446 AVE
Structurally DeficientOver: CK
1.5N & 1W MARION, Turner, SD
Built 1945 Load: 19.1 t ADT: 100
15th Street NE
Structurally DeficientOver: Ravine Park Lake
1N & 0.3E of Huron, Beadle, SD
Built 1924 Load: 19.6 t ADT: 56
396TH AVENUE
Structurally DeficientOver: ENEMY CK
4.6S & 1W MT VERNON, Davison, SD
Built 1967 Load: 19.6 t ADT: 64
257TH ST.
Structurally DeficientOver: ENEMY CK
3 S & 12.5W MITCHELL, Davison, SD
Built 1920 Load: 19.6 t ADT: 64
212th Street
Structurally DeficientOver: Sand Creek
1.5N of 11.9W of Virgil, Beadle, SD
Built 1930 Load: 19.7 t ADT: 56
365TH AVE
Structurally DeficientOver: REE CK
3.1N & 3E ST LAWRENCE, Hand, SD
Built 1920 Load: 19.8 t ADT: 43
478TH AVENUE
Structurally DeficientOver: CK
0.9N BUSHNELL, Brookings, SD
Built 1950 Load: 20.0 t ADT: 1,159
344TH AVE
Structurally DeficientOver: ELM CK
5W & 13.2S REE HEIGHTS, Hand, SD
Built 1930 Load: 20.8 t ADT: 18
478TH AVENUE
Structurally DeficientOver: DEER CK
2.7N BUSHNELL, Brookings, SD
Built 1950 Load: 21.0 t ADT: 712
486TH AVENUE
Structurally DeficientOver: CK
2.5S ELKTON, Brookings, SD
Built 1950 Load: 21.0 t ADT: 361
169TH ST
Structurally DeficientOver: BRYANT CK
2S & 1.4E MIRANDA, Faulk, SD
Built 1934 Load: 21.2 t ADT: 55
407TH AVENUE
Structurally DeficientOver: DRY RUN CK
2 W & 6.8 N MITCHELL, Davison, SD
Built 1935 Load: 22.9 t ADT: 47
161ST ST
Structurally DeficientOver: SOUTH FORK SNAKE CK
11N & 1.9W ZELL, Faulk, SD
Built 1930 Load: 22.9 t ADT: 36
THUNDERHEAD FALLS
Structurally DeficientOver: RAPID CK
0.9E 2.0S JOHNSON SD, Pennington, SD
Built 1964 Load: 23.6 t ADT: 62
29730 484TH AVE
Structurally DeficientOver: CK
12E & 0.3S BERESFORD, Union, SD
Built 1983 Load: 23.6 t ADT: 25
42520 293rd Street
Structurally DeficientOver: Creek
1.2E of Scotland, Bon Homme, SD
Built 1939 Load: 24.5 t ADT: 138
370TH AVE
Structurally DeficientOver: PEARL CK
10E & 1.8N MILLER, Hand, SD
Built 1920 Load: 24.5 t ADT: 25
221st Street
Structurally DeficientOver: Trib. to Big Sioux River
10.8W & 2N of Ward, Moody, SD
Built 1915 Load: 24.5 t ADT: 50
221st Street
Structurally DeficientOver: Trib. to Big Sioux River
10.4W & 2N of Ward, Moody, SD
Built 1915 Load: 24.5 t ADT: 69
158TH SREET
Structurally DeficientOver: CREEK
4S & 1.8E BRENTFORD, Spink, SD
Built 1955 Load: 24.5 t ADT: 30
MEADOWLAND ST
Structurally DeficientOver: DIVERSION DITCH
4.4S & 0.1W BALTIC, Minnehaha, SD
Built 1948 Load: 24.7 t ADT: 26
266TH STREET
Structurally DeficientOver: TRIB TO SKUNK CK
2.2S & 1.3W ELLIS, Minnehaha, SD
Built 1952 Load: 24.8 t ADT: 78
IRR BIA RTE 3
Structurally DeficientOver: LITTLE WHITE RIVER
IN GHOST HAWK PARK, Todd, SD
Built 1964 Load: 24.8 t ADT: 44
230 STREET
Structurally DeficientOver: FIRESTEEL CK
1S 3W LANE, Jerauld, SD
Built 1937 Load: 25.2 t ADT: 20
IRR BIA RTE 2
Structurally DeficientOver: RED WATER CREEK
8.5 KM E OF SD HWY 63, Dewey, SD
Built 1961 Load: 27.2 t ADT: 180
GRAND VIEW MEADOW
Structurally DeficientOver: COLTON CK
1.9S & 2.1W LYONS, Minnehaha, SD
Built 1940 Load: 27.7 t ADT: 70
Showing 5,851-5,900 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 |