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
289th Street
Structurally DeficientOver: Long Creek
10S & 0.9W of Lennox, Lincoln, SD
Built 1935 ADT: 47
COUNTY RD
Structurally DeficientOver: CK
3N & 8.9E KENNEBEC, Lyman, SD
Built 1945 ADT: 10
KENTUCKY PL.
Structurally DeficientOver: SULPHUR CK
9.7S & 2.8E MUD BUTTE, Meade, SD
Built 1925 ADT: 30
425 AVE
Structurally DeficientOver: ROCK CK
10.0W & 0.9S CANOVA, Miner, SD
Built 1920 ADT: 30
SMITHWICK ROAD
Structurally DeficientOver: WHITE RIVER
.75 KM NE OF BIA RTE 41, Oglala Lakota, SD
Built 1935 ADT: 10
195 STREET
Structurally DeficientOver: MEDICINE KNOLL CK
10S & 8.2E ONIDA, Sully, SD
Built 1913 ADT: 10
456TH AVE
Structurally DeficientOver: ELCE CK
3.7N & 3E PARKER, Turner, SD
Built 1934 ADT: 35
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
246 ST
Structurally DeficientOver: FIRESTEEL CK
6.8E 7N PLANKINTON, Aurora, SD
Built 1930 Load: 2.7 t ADT: 65
386th Avenue
Structurally DeficientOver: Sand Creek
3.5W & 4.5S of Virgil, Beadle, SD
Built 1915 Load: 2.7 t ADT: 56
211TH ST
Structurally DeficientOver: CAIN CK
3N VIRGIL, Beadle, SD
Built 1928 Load: 2.7 t ADT: 56
212th Street
Structurally DeficientOver: Middle Pearl Creek
4S & 3.8W of Iroquois, Beadle, SD
Built 1928 Load: 2.7 t ADT: 56
40370 311th Street
Structurally DeficientOver: Choteau Creak
10.2W & 1N of Springfield, Bon Homme, SD
Built 1905 Load: 2.7 t ADT: 50
Jefferson Road
Structurally DeficientOver: Trib. to Dry Choteau Ck
0.4N of Avon, Bon Homme, SD
Built 1945 Load: 2.7 t ADT: 60
29970 415th Avenue
Structurally DeficientOver: Trib. to Emanuel Creek
1W & 3.3N of Tyndall, Bon Homme, SD
Built 1930 Load: 2.7 t ADT: 60
398th Avenue
Structurally DeficientOver: Mud Creek
2E & 2.4S of Sratford, Brown, SD
Built 1915 Load: 2.7 t ADT: 98
103rd Street
Structurally DeficientOver: James River
0.7N & 1W of Hecla, Brown, SD
Built 1900 Load: 2.7 t ADT: 98
KLING RD
Structurally DeficientOver: HAY CK
6W 1.5S B FOURCHE, Butte, SD
Built 1930 Load: 2.7 t ADT: 12
YPPARILLA RD
Structurally DeficientOver: CK
3 N .4 W NEWELL, Butte, SD
Built 1960 Load: 2.7 t ADT: 47
EICHER RD
Structurally DeficientOver: HORSE CK
3.2 S NEWELL.8E US79, Butte, SD
Built 1950 Load: 2.7 t ADT: 47
ZEONA RD
Structurally DeficientOver: CK
1.0N & 3.5E HOOVER, Butte, SD
Built 1966 Load: 2.7 t ADT: 4
37570 287 STREET
Structurally DeficientOver: PEASE CK
2.0S,1.7E OF GEDDES, Charles Mix, SD
Built 1920 Load: 2.7 t ADT: 48
39540 287th Street
Structurally DeficientOver: Choteau Creek
10.0N & 0.4E of Wagner, Charles Mix, SD
Built 1940 Load: 2.7 t ADT: 48
46380 308 ST
Structurally DeficientOver: VERMILLION RV
10.5S & 11.8E IRENE, Clay, SD
Built 1930 Load: 2.7 t ADT: 15
46610 305TH ST.
Structurally DeficientOver: BAPTIST CK
8S & 14.1E IRENE SD, Clay, SD
Built 1935 Load: 2.7 t ADT: 15
167 STREET
Structurally DeficientOver: WILLOW CK
2.2W 5N KRANZBURG, Codington, SD
Built 1910 Load: 2.7 t ADT: 73
104th Street
Structurally DeficientOver: Hump Creek
2.5E & 2S WATAUGA, Corson, SD
Built 1930 Load: 2.7 t ADT: 30
370TH AVE
Structurally DeficientOver: SOUTH FORK SNAKE CK
9.7N & 2W ZELL, Faulk, SD
Built 1920 Load: 2.7 t ADT: 36
297 STREET
Structurally DeficientOver: CK
1S & 0.1W HERRICK, Gregory, SD
Built 1920 Load: 2.7 t ADT: 10
365 AVE
Structurally DeficientOver: WOLF CK
5 E & 8.2 N MILLER, Hand, SD
Built 1915 Load: 2.7 t ADT: 43
231 STREET
Structurally DeficientOver: CROW CK
2.2S & 17.8W WSSGTN SPRGS, Jerauld, SD
Built 1925 Load: 2.7 t ADT: 42
222ND STREET
Structurally DeficientOver: CK
1S & 10W ALPENA, Jerauld, SD
Built 1960 Load: 2.7 t ADT: 42
416th Avenue
Structurally DeficientOver: Crow Creek Ditch
2N & 1E of Amherst, Marshall, SD
Built 1935 Load: 2.7 t ADT: 35
GRAVEL RD.
Structurally DeficientOver: CK
2.6N & 6.3E STURGIS, Meade, SD
Built 1930 Load: 2.7 t ADT: 33
PINE CREEK RD.
Structurally DeficientOver: PINE CK
21.1W & 13.9S FAITH, Meade, SD
Built 1935 Load: 2.7 t ADT: 18
PINE CREEK (UNORG)
Structurally DeficientOver: PINE CK
5W & 0.8S WHITE RIVER, Mellette, SD
Built 1992 Load: 2.7 t ADT: 10
DIRT TRAIL
Structurally DeficientOver: ROCK CK
10S & 11.5W HOWARD, Miner, SD
Built 1910 Load: 2.7 t ADT: 5
MAIN STREET
Structurally DeficientOver: REDSTONE CK
MAIN ST. - CARTHAGE, Miner, SD
Built 1906 Load: 2.7 t ADT: 36
239TH ST.
Structurally DeficientOver: ROCK CK
6S & 6.5W HOWARD, Miner, SD
Built 1910 Load: 2.7 t ADT: 5
SAN MARCO BLVD.
Structurally DeficientOver: PIERRE ST DRAINAGE DITCH
.1S SANMARCO&S.CANYON RC, Pennington, SD
Built 1977 Load: 2.7 t ADT: 250
184th Street
Structurally DeficientOver: James River
11S & 1.8E FRANKFORT, Spink, SD
Built 1910 Load: 2.7 t ADT: 31
277 STREET
Structurally DeficientOver: DOG EAR CK
1.1W & 1N WINNER, Tripp, SD
Built 1930 Load: 2.7 t ADT: 55
31140 474TH AVE
Structurally DeficientOver: CK
13.4S & 2E BERESFORD, Union, SD
Built 1983 Load: 2.7 t ADT: 5
S. 1st Avenue
Structurally DeficientOver: Creek
SE corner of Selby, Walworth, SD
Built 1930 Load: 2.7 t ADT: 183
IRR COUNTY ROAD
Structurally DeficientOver: BEAR CK
0.2 N. DUPREE, Ziebach, SD
Built 1935 Load: 2.7 t ADT: 10
Showing 5,651-5,700 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 |