Total Bridges
5,905
Public highway bridges in South Dakota
State profile · Above median Poor share
South Dakota bridge safety
Condition ratings, load ratings, and Poor-condition data for every public highway bridge in South Dakota, based on the FHWA National Bridge Inventory.
- 5,905
- Public bridges
- 31.9%
- Good condition
- 16.2%
- Poor condition
Data updated May 2026
Good Condition
31.9%
1,885 bridges rated 7-9
-18.1pp vs 50% benchmark
Poor Condition
16.2%
959 bridges whose lowest applicable component is rated 0-4
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 - Poor-condition share 54.1%
National avg
Lower is better. Bar maxes at 30% (worst-state ceiling). National average sits at 7.0%.
Condition Distribution
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 by Poor-condition share (lower share = better)
States are ranked by the share of bridges whose lowest applicable component rating is 4 or below. This describes recorded condition; it does not measure funding effectiveness or live crossing safety. States here sit immediately above and below South Dakota on the same metric.
GU
Guam
15.25% top marginal rate
WV
West Virginia
16.02% top marginal rate
SD
South Dakota
16.24% top marginal rate
IA
Iowa
20.01% top marginal rate
VI
Virgin Islands
29.17% top marginal rate
Bridges Needing Most Attention in South Dakota
Six lowest-condition bridges in South Dakota, ranked by the portal's composite display score. Inspection intervals are risk-based under current NBIS rules.
483 AVENUE
PoorOver: WHETSTONE RV
4.8E & 3.2N MILBANK, Grant, SD
Built 1962 Load: 0.9 t ADT: 25
202ND ST.
PoorOver: BEAR BUTTE CK
5.3E BEAR BUTTE, Meade, SD
Built 2000 Load: 0.9 t ADT: 50
45980 303 ST.
PoorOver: VERMILLION RV
6S & 7.8E IRENE, Clay, SD
Built 1909 Load: 1.8 t ADT: 15
460th Avenue
PoorOver: Big Coulee Creek
4S & 2W of Peever, Roberts, SD
Built 1950 Load: 2.2 t ADT: 22
197TH ST
PoorOver: TURTLE CK
1N & 1E ST LAWRENCE, Hand, SD
Built 1925 Load: 2.5 t ADT: 25
242 ST
PoorOver: CK
1.8E 11.0N PLANKINTON, Aurora, SD
Built 1917 Load: 2.7 t ADT: 101
All Bridges in South Dakota
153RD ST
PoorOver: SNAKE CREEK
1.0N 4.1W NORTHVILLE, Spink, SD
Built 1913 Load: 8.1 t ADT: 55
39450 292nd Street
PoorOver: Choteau Creek
5.0N & 0.5W of Wagner, Charles Mix, SD
Built 1974 Load: 8.2 t ADT: 40
144 STREET
PoorOver: CK
10.1W & 2.5N MARVIN, Grant, SD
Built 1956 Load: 8.2 t ADT: 55
476 AVENUE
PoorOver: CK
2W & 5.3S MILBANK, Grant, SD
Built 1920 Load: 8.2 t ADT: 10
165 STREET
PoorOver: SOUTH FORK YELLOW BANK R
4.7E & 4S STRANDBURG, Grant, SD
Built 1940 Load: 8.2 t ADT: 26
480 AVENUE
PoorOver: SOUTH FORK WHETSTONE RV
1N & 1.5E MILBANK, Grant, SD
Built 1938 Load: 8.2 t ADT: 410
485 AVENUE
PoorOver: CK
3E & 4.5S ALBEE, Grant, SD
Built 1950 Load: 8.2 t ADT: 35
487 AVENUE
PoorOver: NORTH FORK YELLOW BANK R
9E & 1.3S MILBANK, Grant, SD
Built 1958 Load: 8.2 t ADT: 35
STATE PARK RD
PoorOver: CK
4.4E 3.5N STURGIS, Meade, SD
Built 1964 Load: 8.2 t ADT: 33
223RD STREET
PoorOver: BIG SIOUX RV
EGAN, SD, Moody, SD
Built 1922 Load: 8.2 t ADT: 100
167TH ST
PoorOver: James River
1.8S 0.9E ASHTON, Spink, SD
Built 1912 Load: 8.2 t ADT: 54
210TH STREET
PoorOver: BIG SIOUX RV
1N & 1.8E VOLGA, Brookings, SD
Built 1907 Load: 8.3 t ADT: 92
479TH AVENUE
PoorOver: CK
1.6N & 1E WHITE, Brookings, SD
Built 1920 Load: 8.3 t ADT: 92
36460 276th Street
PoorOver: Platte Creek
2.4W & 0.2N of Platte, Charles Mix, SD
Built 1936 Load: 8.3 t ADT: 48
366TH AVE
PoorOver: PEARL CK
4E & .4N ST LAWRENCE, Hand, SD
Built 1932 Load: 8.4 t ADT: 43
167TH STREET
PoorOver: TIMBER CREEK
5N & 5W DOLAND, Spink, SD
Built 1932 Load: 8.4 t ADT: 55
280 STREET
PoorOver: THUNDER CK
3.4E & 3S WINNER, Tripp, SD
Built 1962 Load: 8.4 t ADT: 31
41460 301st Street
PoorOver: Emanuel Creek
2N & 1.4W of Tyndall, Bon Homme, SD
Built 1930 Load: 8.6 t ADT: 60
295th Street
PoorOver: Trib. to E Brule Creek
2N & 6.4E of Beresford, Lincoln, SD
Built 1940 Load: 8.7 t ADT: 41
THUNDERHEAD FALLS
PoorOver: RAPID CK
0.8E 1.9S JOHNSON SD, Pennington, SD
Built 1972 Load: 8.7 t ADT: 62
289th Street
PoorOver: Long Creek
10S & 0.8W of Lennox, Lincoln, SD
Built 1935 Load: 8.8 t ADT: 45
29110 393rd Avenue
PoorOver: Creek
5.9N & 2.0W of Wagner, Charles Mix, SD
Built 1925 Load: 8.9 t ADT: 48
463rd Avenue
PoorOver: Creek
4W & 3S of Wilmot, Roberts, SD
Built 1929 Load: 8.9 t ADT: 30
471st Avenue
PoorOver: Creek
0.8NW of Corona, Roberts, SD
Built 1934 Load: 9.0 t ADT: 50
194TH St
PoorOver: Shue Creek
14N 6.2W Iroquois, Beadle, SD
Built 1936 Load: 9.1 t ADT: 56
192nd Street
PoorOver: Creek
16N & 4.8W of Iroquois, Beadle, SD
Built 1928 Load: 9.1 t ADT: 33
29120 419th Avenue
PoorOver: Dawson Creek
0.8N & 4W of Scotland, Bon Homme, SD
Built 1910 Load: 9.1 t ADT: 60
STATE PARK RD
PoorOver: Grace Coolidge Creek
8.6E 3.7N OF CUSTER, Custer, SD
Built 1950 Load: 9.1 t ADT: 100
STATE PARK RD
PoorOver: Grace Coolidge Creek
9E 2.6N CUSTER, Custer, SD
Built 1950 Load: 9.1 t ADT: 100
423rd Avenue
PoorOver: BURLINGTON NORTHERN RR
3rd Street - Bristol, Day, SD
Built 1938 Load: 9.1 t ADT: 218
27140 404 AVE
PoorOver: CK
12.5 N 2.5E DELMONT, Douglas, SD
Built 1985 Load: 9.1 t ADT: 10
150 STREET
PoorOver: CK
1.9W & 1S MILBANK, Grant, SD
Built 1925 Load: 9.1 t ADT: 35
CENTER ROAD
PoorOver: CK
1.5W & 5.1S MILBANK, Grant, SD
Built 1927 Load: 9.1 t ADT: 20
FAIRVIEW ROAD
PoorOver: SOUTH FORK BAD RV
5E & 3S COTTONWOOD, Jackson, SD
Built 1940 Load: 9.1 t ADT: 10
248th Street
PoorOver: W. Fork of Vermillion Rv
4N & 1.9W of Salem, McCook, SD
Built 1917 Load: 9.1 t ADT: 5
28650 461 AVE
PoorOver: VERMILLION RV
1E & 1.5S DAVIS, Turner, SD
Built 1956 Load: 9.1 t ADT: 207
OLD HIGHWAY 79
PoorOver: ANTELOPE HOLLOW CK
0.8S & 0.2E OELRICHS, Fall River, SD
Built 1930 Load: 9.2 t ADT: 100
158TH STREET
PoorOver: CREEK
3N & 2.5W TURTON, Spink, SD
Built 1935 Load: 9.2 t ADT: 31
127th Street
PoorOver: Creek
3N & 4.9W Pierpont, Day, SD
Built 1930 Load: 9.3 t ADT: 15
361ST AVE
PoorOver: REE CK
2.4N & 1E MILLER, Hand, SD
Built 1910 Load: 9.3 t ADT: 43
484th Avenue
PoorOver: Trib. to Pattee Creek
3W & 3.6N of Hudson, Lincoln, SD
Built 1940 Load: 9.3 t ADT: 50
130TH AVE.
PoorOver: CK
3 E & 12.5 N STURGIS, Meade, SD
Built 1968 Load: 9.3 t ADT: 33
292 STREET
PoorOver: WILLOW CK
1.3E CLEARFIELD, Tripp, SD
Built 1950 Load: 9.3 t ADT: 46
28380 446 AVE
PoorOver: TURKEY RIDGE CK
1W & 9.8S MARION, Turner, SD
Built 1910 Load: 9.3 t ADT: 5
409th Avenue
PoorOver: Pearl Creak
4.8S of Cavour, Beadle, SD
Built 1930 Load: 9.4 t ADT: 178
480th Avenue
PoorOver: East Brule Creek
6W & 3.7S of Fairview, Lincoln, SD
Built 1950 Load: 9.4 t ADT: 50
327th Avenue
PoorOver: Creek
1W & 8.2S of Reliance, Lyman, SD
Built 1940 Load: 9.4 t ADT: 10
264 ST
PoorOver: PLATTE CK
12S 1.9W WHITE LAKE, Aurora, SD
Built 1978 Load: 9.5 t ADT: 33
42030 302nd Street
PoorOver: Snatch Creek
3.3E & 2N of Tyndall, Bon Homme, SD
Built 1983 Load: 9.5 t ADT: 60
27720 363rd Avenue
PoorOver: Platte Creek
1.2S & 4.0W of Platte, Charles Mix, SD
Built 1977 Load: 9.5 t ADT: 48
Showing 5,151-5,200 of 5,905 bridges
Related
Data sourced from the FHWA National Bridge Inventory (NBI), latest released cycle. See our methodology for details. Retrieved and formatted by PlainBridges.
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). Poor condition is an inspection-record category, not a closure or unsafe-to-cross designation. Consult the bridge owner for current status.
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.
Every figure on PlainBridge is rendered directly from federal source data, no number is typed in by an editor. This page draws directly on federal source data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.