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
29850 FROGCREEK RD
FairOver: FROG CK
1.5S & 7E IRENE, Clay, SD
Built 1965 Load: 31.9 t ADT: 95
US014
FairOver: LONE TREE CK
3.8 SW HAAKON CO LINE, Jackson, SD
Built 1954 Load: 31.9 t ADT: 970
SD079
FairOver: SPRING CK
5.2 N JCT SD 34, Meade, SD
Built 1954 Load: 31.9 t ADT: 2,199
263RD ST, MAPLE ST
FairOver: BIG SIOUX RIVER
1.5S & 1.5W BRANDON, Minnehaha, SD
Built 1979 Load: 31.9 t ADT: 418
EIGHTH STREET
FairOver: RAPID CK
0.1N 8TH ST & OMAHA - RC, Pennington, SD
Built 1974 Load: 31.9 t ADT: 5,800
CREEK DRIVE
FairOver: DRAINAGE DITCH
0.4 S ST PATRICK ST - RC, Pennington, SD
Built 1985 Load: 31.9 t ADT: 100
LWER SPRING CRK RD
FairOver: SPRING CK
6.8 W,6.0 S. CAPUTA, Pennington, SD
Built 1972 Load: 31.9 t ADT: 63
282 STREET
FairOver: MUD CK
4S WINNER, Tripp, SD
Built 1965 Load: 31.9 t ADT: 25
I090 L
FairOver: MO. RV (FRANCIS CASE LK)
AT CHAMBERLAIN, Brule, SD
Built 1953 Load: 32.0 t ADT: 1,652
US212
FairOver: WILLOW CK
1.4 E JCT US 81, Codington, SD
Built 1970 Load: 32.0 t ADT: 10,754
I090 W
FairOver: CK
5.5 W US 83 N INTERCH, Jones, SD
Built 1970 Load: 32.0 t ADT: 3,700
SD038
FairOver: EAST FORK VERMILLION RV
2.9 NW MINNEHAHA CO LINE, McCook, SD
Built 1947 Load: 32.0 t ADT: 1,708
377TH AVE
FairOver: SOUTH FORK SNAKE CK
3 W 1.1 S ATHOL, Spink, SD
Built 1968 Load: 32.0 t ADT: 41
US014
FairOver: PRAIRIE DOG CK
7.8 S JCT SD 34, Stanley, SD
Built 1960 Load: 32.0 t ADT: 650
SD037
FairOver: CK
6.5 S I 90 INTERCH, Davison, SD
Built 1946 Load: 32.1 t ADT: 3,929
150TH ST
FairOver: NORTH FORK SNAKE CK
3N CRESBARD, Faulk, SD
Built 2003 Load: 32.1 t ADT: 15
US014
FairOver: MITCHELL CK
0.6 E OF MIDLAND, Haakon, SD
Built 1960 Load: 32.1 t ADT: 714
IRR SD044
FairOver: BEAR-IN-THE-LODGE CK
8.5 W OF WANBLEE, Jackson, SD
Built 2012 Load: 32.1 t ADT: 553
SD050
FairOver: EMANUEL CK
1.0 W JCT SD 37 SOUTH, Bon Homme, SD
Built 1960 Load: 32.2 t ADT: 2,189
207TH STREET
FairOver: SIX MILE CK
5N & 3.3E BROOKINGS, Brookings, SD
Built 1974 Load: 32.2 t ADT: 120
IRR SD065
FairOver: FIRESTEEL CK
0.4 N DEWEY CO LINE, Corson, SD
Built 1961 Load: 32.2 t ADT: 556
IRR AR SD063
FairOver: SIMMS CK
10 N JCT SD 44, Mellette, SD
Built 1959 Load: 32.2 t ADT: 159
OLD HILL CITY ROAD
FairOver: BATTLE CK
0.9 W. KEYSTONE, Pennington, SD
Built 1973 Load: 32.2 t ADT: 984
46450 309TH ST.
FairOver: VERMILLION RV
3S & 0.5W HUB CITY, Clay, SD
Built 1981 Load: 32.3 t ADT: 97
167TH ST
FairOver: CK
0.7E MIRANDA, Faulk, SD
Built 2002 Load: 32.3 t ADT: 36
333 AVENUE
FairOver: BULL CK
4W & 0.7N JCT 44&47, Gregory, SD
Built 1965 Load: 32.3 t ADT: 114
340 AVENUE
FairOver: CK
3E 2.4N STEPHAN, Hyde, SD
Built 1975 Load: 32.3 t ADT: 14
Deer Valley Road
FairOver: Creek
4.8W & 7.8S of Reliance, Lyman, SD
Built 1940 Load: 32.3 t ADT: 25
FOX RIDGE RD.
FairOver: BEAVER CK
0.5 N OPAL SCHOOL, Meade, SD
Built 1978 Load: 32.3 t ADT: 60
I029 S
FairOver: SKUNK CK
0.3 N 26TH ST INTERCH, Minnehaha, SD
Built 1989 Load: 32.3 t ADT: 32,190
209TH STREET
FairOver: NORTH DEER CK
3N & 4W BROOKINGS, Brookings, SD
Built 1970 Load: 32.4 t ADT: 92
469TH AVENUE
FairOver: LAKE CAMPBELL OUTLET
5.9S & 2W BROOKINGS, Brookings, SD
Built 1968 Load: 32.4 t ADT: 92
201ST STREET
FairOver: NORTH DEER CK
2.5N & 6.3W WHITE, Brookings, SD
Built 1970 Load: 32.4 t ADT: 336
SD030
FairOver: SIX MILE CK
3.4 E I 29 INTERCH, Brookings, SD
Built 1956 Load: 32.4 t ADT: 1,187
I090 W
FairOver: WHITEWOOD CK
1.0 SE SD 34 N INTERCH, Lawrence, SD
Built 1967 Load: 32.4 t ADT: 7,485
I090 E
FairOver: WHITEWOOD CK
1.0 SE SD 34 N INTERCH, Lawrence, SD
Built 1967 Load: 32.4 t ADT: 7,485
IRR AR SD063
FairOver: BLACK PIPE CK
2.3 N JCT SD 44 E, Mellette, SD
Built 1959 Load: 32.4 t ADT: 159
IRR BIA RTE 27
FairOver: COTTONWOOD CREEK
8 KM NORTH OF ROCKYFORD, Oglala Lakota, SD
Built 1965 Load: 32.4 t ADT: 916
IRR BIA RTE 2
FairOver: WHITE RIVER
4.3 KM NW OF ROCKYFORD, Oglala Lakota, SD
Built 1973 Load: 32.4 t ADT: 134
SD020
FairOver: SNAKE CK
2.1 E FAULK CO LINE, Spink, SD
Built 1959 Load: 32.4 t ADT: 975
220TH STREET
FairOver: MEDARY CK
8S & 1.2E BROOKINGS, Brookings, SD
Built 1966 Load: 32.5 t ADT: 92
I029 S
FairOver: NORTH DEER CK
3.1 S DEUEL CO LINE, Brookings, SD
Built 1970 Load: 32.5 t ADT: 4,680
I029 N
FairOver: NORTH DEER CK
3.1 S DEUEL CO LINE, Brookings, SD
Built 1970 Load: 32.5 t ADT: 4,680
US012
FairOver: ANTELOPE CK
1.6 E JCT SD 37, Brown, SD
Built 1972 Load: 32.5 t ADT: 3,468
SD034
FairOver: MUSH CK
7.3 E JCT US 14 & 83, Hughes, SD
Built 1954 Load: 32.5 t ADT: 1,566
485TH AVENUE
FairOver: BEAVER CREEK
2W & 1.6S VALLEY SPRINGS, Minnehaha, SD
Built 1970 Load: 32.5 t ADT: 17
I090 W
FairOver: CK
2.1 E US 16 B INTERCHANGE, Pennington, SD
Built 1962 Load: 32.5 t ADT: 9,610
I090 E
FairOver: CK
2.1 E US 16 B INTERCHANGE, Pennington, SD
Built 1962 Load: 32.5 t ADT: 9,610
US212
FairOver: WILLOW CK
5.7 NE OF NEWELL, Butte, SD
Built 1956 Load: 32.6 t ADT: 494
IRR US018
FairOver: SLIM BUTTE CK
9 E FALL RIVER CO LINE, Oglala Lakota, SD
Built 1953 Load: 32.6 t ADT: 676
Showing 2,151-2,200 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 |