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
481st Avenue
Structurally DeficientOver: East Brule Creek
5W & 4.4S of Fairview, Lincoln, SD
Built 1959 Load: 7.1 t ADT: 41
105th Street
Structurally DeficientOver: Little Minnesota River
0.5N & 0.7E of Claire Cty, Roberts, SD
Built 1967 Load: 7.1 t ADT: 25
28070 416 AVE.
Structurally DeficientOver: DRY CK
4.7S,6.0E PARKSTON, Hutchinson, SD
Built 1935 Load: 7.3 t ADT: 35
371 AVE
Structurally DeficientOver: WOLF CK
11E & 11.7N MILLER, Hand, SD
Built 1930 Load: 7.4 t ADT: 10
HORSESHOE BUTTE RD
Structurally DeficientOver: BLACK PIPE CK
1.9E & 3.7S BELVIDERE, Jackson, SD
Built 1930 Load: 7.5 t ADT: 27
212th Street
Structurally DeficientOver: S. Fork of Pearl Creek
4S & 0.9W of Iroquois, Beadle, SD
Built 1922 Load: 8.1 t ADT: 56
220TH ST
Structurally DeficientOver: ROCK CK
5 S & 5.4 E ESMOND, Kingsbury, SD
Built 1987 Load: 8.1 t ADT: 10
480 AVENUE
Structurally DeficientOver: SOUTH FORK WHETSTONE RV
1N & 1.5E MILBANK, Grant, SD
Built 1938 Load: 8.2 t ADT: 410
366TH AVE
Structurally DeficientOver: PEARL CK
4E & .4N ST LAWRENCE, Hand, SD
Built 1932 Load: 8.4 t ADT: 43
167TH STREET
Structurally DeficientOver: TIMBER CREEK
5N & 5W DOLAND, Spink, SD
Built 1932 Load: 8.4 t ADT: 55
289th Street
Structurally DeficientOver: Long Creek
10S & 0.8W of Lennox, Lincoln, SD
Built 1935 Load: 8.8 t ADT: 45
29110 393rd Avenue
Structurally DeficientOver: Creek
5.9N & 2.0W of Wagner, Charles Mix, SD
Built 1925 Load: 8.9 t ADT: 48
194TH St
Structurally DeficientOver: Shue Creek
14N 6.2W Iroquois, Beadle, SD
Built 1936 Load: 9.1 t ADT: 56
29120 419th Avenue
Structurally DeficientOver: Dawson Creek
0.8N & 4W of Scotland, Bon Homme, SD
Built 1910 Load: 9.1 t ADT: 60
248th Street
Structurally DeficientOver: W. Fork of Vermillion Rv
4N & 1.9W of Salem, McCook, SD
Built 1917 Load: 9.1 t ADT: 5
28650 461 AVE
Structurally DeficientOver: VERMILLION RV
1E & 1.5S DAVIS, Turner, SD
Built 1956 Load: 9.1 t ADT: 207
484th Avenue
Structurally DeficientOver: Trib. to Pattee Creek
3W & 3.6N of Hudson, Lincoln, SD
Built 1940 Load: 9.3 t ADT: 50
292 STREET
Structurally DeficientOver: WILLOW CK
1.3E CLEARFIELD, Tripp, SD
Built 1950 Load: 9.3 t ADT: 46
28380 446 AVE
Structurally DeficientOver: TURKEY RIDGE CK
1W & 9.8S MARION, Turner, SD
Built 1910 Load: 9.3 t ADT: 5
264 ST
Structurally DeficientOver: PLATTE CK
12S 1.9W WHITE LAKE, Aurora, SD
Built 1978 Load: 9.5 t ADT: 33
42030 302nd Street
Structurally DeficientOver: Snatch Creek
3.3E & 2N of Tyndall, Bon Homme, SD
Built 1983 Load: 9.5 t ADT: 60
E MAIN ST,FAS 6488
Structurally DeficientOver: BEAVER CK
0.4E BUFFALO GAP, Custer, SD
Built 1971 Load: 9.5 t ADT: 108
399TH AVENUE
Structurally DeficientOver: ENEMY CK
4.3S & 2E MT VERNON, Davison, SD
Built 1935 Load: 9.8 t ADT: 64
CITY STREET
Structurally DeficientOver: CK
THIRD ST-DELL RAPIDS, Minnehaha, SD
Built 1952 Load: 9.8 t ADT: 160
MINNEKAHTA AVENUE
Structurally DeficientOver: FALL RV
MINNEKAHTA&RIVER HOTSPNGS, Fall River, SD
Built 1934 Load: 9.9 t ADT: 588
IMPALA PL.
Structurally DeficientOver: CK
2.9N & 21.3E STURGIS, Meade, SD
Built 1964 Load: 10.1 t ADT: 10
480th Avenue
Structurally DeficientOver: Pattee Creek
6W & 2.5S of Fairview, Lincoln, SD
Built 1935 Load: 10.4 t ADT: 55
422nd Avenue
Structurally DeficientOver: Spain Ditch
5.9N & 3E of Langford, Marshall, SD
Built 1930 Load: 10.6 t ADT: 35
410TH AVE
Structurally DeficientOver: BR FOSTER CREEK
4E & 7.7N BLOOMFIELD, Spink, SD
Built 1935 Load: 10.6 t ADT: 31
487th Avenue
Structurally DeficientOver: Flandreau Creek
1.7N & 6E of Flandreau, Moody, SD
Built 1982 Load: 10.7 t ADT: 15
TWNSHP RD 480 AV
Structurally DeficientOver: Mud Creek
4E & 5.4N TUNERVILLE, Deuel, SD
Built 1950 Load: 10.9 t ADT: 25
SCENIC ROAD
Structurally DeficientOver: CHEYENNE RV
3.5E & 3.3S HOT SPRINGS, Fall River, SD
Built 1930 Load: 10.9 t ADT: 41
373rd Avenue
Structurally DeficientOver: Snake Creek
11W & 1S of Warner, Brown, SD
Built 1929 Load: 11.0 t ADT: 98
425th Avenue
Structurally DeficientOver: BURLINGTON NORTHERN RR
1.6E & 0.6S of Bristol, Day, SD
Built 1960 Load: 11.0 t ADT: 274
238th Street
Structurally DeficientOver: Trib. to Bachelor Creek
4.5E & 3S of Colman, Moody, SD
Built 1950 Load: 11.0 t ADT: 15
466th Avenue
Structurally DeficientOver: Creek
3.5N & 1W of Wilmot, Roberts, SD
Built 1940 Load: 11.0 t ADT: 32
466th Avenue
Structurally DeficientOver: Creek
1W & 0.1N of Wilmot, Roberts, SD
Built 1935 Load: 11.0 t ADT: 35
117th Street
Structurally DeficientOver: Jim Creek
9E & 2N of Sisseton, Roberts, SD
Built 1929 Load: 11.0 t ADT: 30
477th Avenue
Structurally DeficientOver: Creek
4E & 6.5S of Rosholt, Roberts, SD
Built 1966 Load: 11.0 t ADT: 25
45970 279 ST.
Structurally DeficientOver: VERMILLION RV
2S & 1.3W CHANCELLOR, Turner, SD
Built 1985 Load: 11.4 t ADT: 97
482ND AVENUE
Structurally DeficientOver: Medary Creek
3.8N & 4W ELKTON, Brookings, SD
Built 1975 Load: 11.7 t ADT: 45
HUETHER ROAD
Structurally DeficientOver: TRIB TO CHEYENNE RIVER
4.0W 5.3N CONATA, Pennington, SD
Built 1940 Load: 11.8 t ADT: 25
WHITE BUTTE ROAD
Structurally DeficientOver: LODGEPOLE CK
4.5E 13.9 N BISON, Perkins, SD
Built 1965 Load: 11.8 t ADT: 163
244 ST
Structurally DeficientOver: FIRESTEEL CK
1S & 2.5W STORLA, Aurora, SD
Built 1940 Load: 12.2 t ADT: 33
245 ST
Structurally DeficientOver: FIRESTEEL CK
5.3E 8N PLANKINTON, Aurora, SD
Built 1940 Load: 12.2 t ADT: 33
193rd Street
Structurally DeficientOver: Creek
9N & 3.8E of Wessington, Beadle, SD
Built 1930 Load: 12.2 t ADT: 56
379th Avenue
Structurally DeficientOver: Creek
12.8S & 6W of Wolsey, Beadle, SD
Built 1928 Load: 12.2 t ADT: 69
201ST ST
Structurally DeficientOver: Shue Creek
7N 0.9E Cavour, Beadle, SD
Built 1922 Load: 12.2 t ADT: 56
42090 303rd Street
Structurally DeficientOver: Snatch Creek
3.9E & 1N of Tyndall, Bon Homme, SD
Built 1910 Load: 12.2 t ADT: 60
30480 428th Avenue
Structurally DeficientOver: Beaver Creek
2W & 4.8S of Lesterville, Bon Homme, SD
Built 1940 Load: 12.2 t ADT: 130
Showing 5,751-5,800 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 |