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
177TH ST
PoorOver: CK
4S 7.5W REDFIELD, Spink, SD
Built 1935 Load: 12.4 t ADT: 55
30830 405TH AVE
PoorOver: Trib. to Choteau Creek
6.3 S 1 W AVON, Bon Homme, SD
Built 1935 Load: 12.5 t ADT: 60
365 AVE
PoorOver: SHAEFER CK
5 E & 11.1 N MILLER, Hand, SD
Built 1935 Load: 12.6 t ADT: 15
210TH STREET
PoorOver: REDSTONE CK
5 N & 3.6 E ESMOND, Kingsbury, SD
Built 1950 Load: 12.6 t ADT: 15
318 AVENUE
PoorOver: OLD LODGE CK
2E & 6.9N WINNER, Tripp, SD
Built 1987 Load: 12.6 t ADT: 31
220 AVENUE
PoorOver: LAKE CK
1.2E 6.3S MARTIN, Bennett, SD
Built 1950 Load: 12.7 t ADT: 40
219TH STREET
PoorOver: CK
5S & 0.7E AURORA, Brookings, SD
Built 1930 Load: 12.7 t ADT: 19
38890 286th Street
PoorOver: Andes Creek
6.0N & 6.9E Lake Andes, Charles Mix, SD
Built 1930 Load: 12.7 t ADT: 48
Main Street
PoorOver: MITCHELL CK
MIDLAND, Haakon, SD
Built 1955 Load: 12.7 t ADT: 45
243 ST
PoorOver: ROCK CK
10S & 9.2W HOWARD, Miner, SD
Built 1925 Load: 12.7 t ADT: 25
46020 282 ST
PoorOver: VERMILLION RV
3N & 0.2E DAVIS, Turner, SD
Built 1985 Load: 12.7 t ADT: 97
473RD AVENUE
PoorOver: BR NORTH DEER CK
5W & 3.4N WHITE, Brookings, SD
Built 1930 Load: 12.8 t ADT: 92
27290 433 AVE.
PoorOver: CK
5.1N,5.0W FREEMAN, Hutchinson, SD
Built 1935 Load: 12.8 t ADT: 15
234 ST
PoorOver: ROCK CK
1S & 6.1W HOWARD, Miner, SD
Built 1926 Load: 12.8 t ADT: 25
300 STREET
PoorOver: SAND CK
1.7W & 4S KEYAPAHA, Tripp, SD
Built 1967 Load: 12.9 t ADT: 55
475TH AVENUE
PoorOver: SIX MILE CK
2.3S & 3W WHITE, Brookings, SD
Built 1930 Load: 13.0 t ADT: 92
127th Street
PoorOver: Creek
4.5W & 3N Pierpont, Day, SD
Built 1930 Load: 13.0 t ADT: 23
368TH AVE
PoorOver: LITTLE TURTLE CK
8E & 6.2N MILLER, Hand, SD
Built 1928 Load: 13.0 t ADT: 15
COUNTY RD
PoorOver: ROCK CK
2.3E CARTHAGE, Miner, SD
Built 1930 Load: 13.1 t ADT: 228
217th Street
PoorOver: S. Fork of Pearl Creek
2.9E & 9S of Cavour, Beadle, SD
Built 1930 Load: 13.2 t ADT: 56
383rd Avenue
PoorOver: Creek
0.7W & 0.1N of Mansfield, Brown, SD
Built 1930 Load: 13.2 t ADT: 98
171ST ST
PoorOver: CREEK
7S 2.9W ATHOL, Spink, SD
Built 1930 Load: 13.2 t ADT: 55
329 AVENUE
PoorOver: WEST BR BULL CK
13E 0.9S WINNER, Tripp, SD
Built 1950 Load: 13.2 t ADT: 35
205TH STREET
PoorOver: NORTH DEER CK
7N & 2.9W BROOKINGS, Brookings, SD
Built 1930 Load: 13.3 t ADT: 92
OLD HWY 85
PoorOver: FOUR MILE CK
4.2E 32.8N B FOURCHE, Butte, SD
Built 1945 Load: 13.3 t ADT: 25
FAS 6253
PoorOver: NORTH FORK BAD RV
15 W 6.8N PHILIP, Haakon, SD
Built 1950 Load: 13.3 t ADT: 48
28980 417 AVE.
PoorOver: DAWSON CK
1.0 WEST OF KAYLOR, Hutchinson, SD
Built 1991 Load: 13.3 t ADT: 50
256TH STREET
PoorOver: SLIP-UP CREEK
3.7E & 6S BALTIC, Minnehaha, SD
Built 1938 Load: 13.3 t ADT: 80
PAULSEN RD
PoorOver: COTTONWOOD CK
0.6W & 2.1N OF QUINN, Pennington, SD
Built 1964 Load: 13.3 t ADT: 17
397TH AVE.
PoorOver: SAND CK
7.5N WOONSOCKET, Sanborn, SD
Built 1920 Load: 13.3 t ADT: 35
408TH AVENUE
PoorOver: DRY RUN CK
3 E LOOMIS, Davison, SD
Built 1935 Load: 13.4 t ADT: 25
223RD STREET
PoorOver: TRIB TO CHEYENNE RIVER
1.1W&6S OF CREIGHTON, Pennington, SD
Built 1935 Load: 13.4 t ADT: 20
COTTONWOOD STREET
PoorOver: BIG SIOUX RV
12.3W .5N SOUTHSHORE, Codington, SD
Built 1973 Load: 13.6 t ADT: 40
177 STREET
PoorOver: BIG SIOUX RV
5.0S 2.5E WATERTOWN, Codington, SD
Built 1920 Load: 13.6 t ADT: 73
476 AVENUE
PoorOver: SOUTH FORK YELLOW BANK R
4.8S LABOLT, Grant, SD
Built 1925 Load: 13.6 t ADT: 176
PAULSEN RD
PoorOver: COTTONWOOD CK
0.5W & 2.2N OF QUINN, Pennington, SD
Built 1964 Load: 13.6 t ADT: 17
DILLINGER RD
PoorOver: HORSE CK
2 W 1.1 S NEWELL, Butte, SD
Built 1937 Load: 13.7 t ADT: 46
ROY STREET
PoorOver: GRIZZLY BEAR CK
ROY ST - KEYSTONE, Pennington, SD
Built 1955 Load: 13.7 t ADT: 200
301 STREET
PoorOver: CK
1.8N 4W WEWELA, Tripp, SD
Built 1958 Load: 13.7 t ADT: 31
COUNTY RD
PoorOver: CK
2 S & 2.6 E DE SMET, Kingsbury, SD
Built 1930 Load: 13.8 t ADT: 35
256TH STREET
PoorOver: WEST BR SKUNK CK
3.5N & 0.3W HARTFORD, Minnehaha, SD
Built 1930 Load: 13.8 t ADT: 13
472ND AVENUE
PoorOver: MEDARY CK
1E & 6.1S BROOKINGS, Brookings, SD
Built 1910 Load: 13.9 t ADT: 92
143rd Street
PoorOver: Mud Creek
1S & 4.4W of Ferney, Brown, SD
Built 1935 Load: 14.0 t ADT: 98
227th Street
PoorOver: Bad River
9.8W & 15.7N MURDO, Jones, SD
Built 1918 Load: 14.1 t ADT: 6
472nd Avenue
PoorOver: Saddle Creek
7.3S of Worthing, Lincoln, SD
Built 1938 Load: 14.1 t ADT: 150
29210 412th Avenue
PoorOver: Emanuel Creek
11W of Scotland, Bon Homme, SD
Built 1975 Load: 14.2 t ADT: 127
40340 287 ST.
PoorOver: CK
3.0S,1.4E OF DELMONT, Douglas, SD
Built 1912 Load: 14.2 t ADT: 20
26970 417 AVE.
PoorOver: TWELVE MILE CK
6.3N,7.0E PARKSTON, Hutchinson, SD
Built 1978 Load: 14.2 t ADT: 45
237 STREET
PoorOver: COTTONWOOD CK
2.5E COTTONWOOD, Jackson, SD
Built 1935 Load: 14.2 t ADT: 10
237 STREET
PoorOver: SOUTH FORK BAD RIVER
6.7E COTTONWOOD, Jackson, SD
Built 1935 Load: 14.2 t ADT: 11
Showing 5,351-5,400 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.