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
104th Street
PoorOver: Hump Creek
2.5E & 2S WATAUGA, Corson, SD
Built 1930 Load: 2.7 t ADT: 30
PARLE ST (GARY)
PoorOver: W Br Lac qui Parle River
PARLE ST. GARY, Deuel, SD
Built 1950 Load: 2.7 t ADT: 50
370TH AVE
PoorOver: SOUTH FORK SNAKE CK
9.7N & 2W ZELL, Faulk, SD
Built 1920 Load: 2.7 t ADT: 36
297 STREET
PoorOver: CK
1S & 0.1W HERRICK, Gregory, SD
Built 1920 Load: 2.7 t ADT: 10
365 AVE
PoorOver: WOLF CK
5 E & 8.2 N MILLER, Hand, SD
Built 1915 Load: 2.7 t ADT: 43
231 STREET
PoorOver: CROW CK
2.2S & 17.8W WSSGTN SPRGS, Jerauld, SD
Built 1925 Load: 2.7 t ADT: 42
222ND STREET
PoorOver: CK
1S & 10W ALPENA, Jerauld, SD
Built 1960 Load: 2.7 t ADT: 42
416th Avenue
PoorOver: Crow Creek Ditch
2N & 1E of Amherst, Marshall, SD
Built 1935 Load: 2.7 t ADT: 35
113th Street
PoorOver: Crow Creek
3S & 1.2W of Britton, Marshall, SD
Built 1935 Load: 2.7 t ADT: 35
GRAVEL RD.
PoorOver: CK
2.6N & 6.3E STURGIS, Meade, SD
Built 1930 Load: 2.7 t ADT: 33
PINE CREEK RD.
PoorOver: PINE CK
21.1W & 13.9S FAITH, Meade, SD
Built 1935 Load: 2.7 t ADT: 18
PINE CREEK (UNORG)
PoorOver: PINE CK
5W & 0.8S WHITE RIVER, Mellette, SD
Built 1992 Load: 2.7 t ADT: 10
DIRT TRAIL
PoorOver: ROCK CK
10S & 11.5W HOWARD, Miner, SD
Built 1910 Load: 2.7 t ADT: 5
MAIN STREET
PoorOver: REDSTONE CK
MAIN ST. - CARTHAGE, Miner, SD
Built 1906 Load: 2.7 t ADT: 36
239TH ST.
PoorOver: ROCK CK
6S & 6.5W HOWARD, Miner, SD
Built 1910 Load: 2.7 t ADT: 5
SAN MARCO BLVD.
PoorOver: PIERRE ST DRAINAGE DITCH
.1S SANMARCO&S.CANYON RC, Pennington, SD
Built 1977 Load: 2.7 t ADT: 250
184th Street
PoorOver: James River
11S & 1.8E FRANKFORT, Spink, SD
Built 1910 Load: 2.7 t ADT: 31
405TH AVE
PoorOver: FOSTER CREEK
1W & 3.2N BLOOMFIELD, Spink, SD
Built 1910 Load: 2.7 t ADT: 50
277 STREET
PoorOver: DOG EAR CK
1.1W & 1N WINNER, Tripp, SD
Built 1930 Load: 2.7 t ADT: 55
31140 474TH AVE
PoorOver: CK
13.4S & 2E BERESFORD, Union, SD
Built 1983 Load: 2.7 t ADT: 5
S. 1st Avenue
PoorOver: Creek
SE corner of Selby, Walworth, SD
Built 1930 Load: 2.7 t ADT: 183
IRR COUNTY ROAD
PoorOver: BEAR CK
0.2 N. DUPREE, Ziebach, SD
Built 1935 Load: 2.7 t ADT: 10
30410 390 AVE
PoorOver: MOSQUITO CK
7.1S,4.8W OF WAGNER, Charles Mix, SD
Built 1941 Load: 2.9 t ADT: 48
468th Avenue
PoorOver: N. Fork Whetstone Rv
0.3E & 0.5N of Wilmot, Roberts, SD
Built 1940 Load: 2.9 t ADT: 28
377TH AVE
PoorOver: CREEK
1 S 6 W REDFIELD, Spink, SD
Built 1929 Load: 2.9 t ADT: 76
179TH ST
PoorOver: TURTLE CREEK
4.0N 4.9W TULARE, Spink, SD
Built 1908 Load: 2.9 t ADT: 55
175TH ST
PoorOver: TURTLE CREEK
1S 2.8W REDFIELD, Spink, SD
Built 1909 Load: 2.9 t ADT: 126
166TH ST
PoorOver: CREEK
1.6W 0.7S ASHTON, Spink, SD
Built 1930 Load: 2.9 t ADT: 55
172ND ST
PoorOver: TURTLE CREEK
1.0E 1.5N REDFIELD, Spink, SD
Built 1915 Load: 2.9 t ADT: 55
277 STREET
PoorOver: OLD LODGE CK
1N & 1.4E WINNER, Tripp, SD
Built 1950 Load: 2.9 t ADT: 100
375th Avenue
PoorOver: Willow Creek
3.6S & 10W Barnard, Brown, SD
Built 1968 Load: 3.0 t ADT: 98
10th Avenue SE
PoorOver: Moccasin Creek
10th Ave. SE - Aberdeen, Brown, SD
Built 1974 Load: 3.0 t ADT: 2,069
8th Avenue SE
PoorOver: Moccasin Creek
8th Ave. SE - Aberdeen, Brown, SD
Built 1976 Load: 3.0 t ADT: 500
421st Avenue
PoorOver: Antelope Creek
4.8N & 2E of Pierpont, Day, SD
Built 1935 Load: 3.0 t ADT: 10
373 AVE
PoorOver: WOLF CK
13E & 10.6N MILLER, Hand, SD
Built 1910 Load: 3.0 t ADT: 10
254 STREET
PoorOver: COTTONWOOD CK
9.9N & 3.3E WANBLEE, Jackson, SD
Built 1950 Load: 3.0 t ADT: 15
122nd Street
PoorOver: Creek
1N & 0.1E of Langford, Marshall, SD
Built 1930 Load: 3.0 t ADT: 14
451st Avenue
PoorOver: Creek
3S & 4W of Claire City, Roberts, SD
Built 1940 Load: 3.0 t ADT: 29
455th Avenue
PoorOver: Big Sioux River
1.7S of Jct with US 12, Roberts, SD
Built 1939 Load: 3.0 t ADT: 2,500
457th Avenue
PoorOver: Creek
6N of Sisseton, Roberts, SD
Built 1935 Load: 3.0 t ADT: 35
149TH ST
PoorOver: Snake Creek
5N 5.9W of Northville, Spink, SD
Built 1913 Load: 3.0 t ADT: 31
388TH AVE
PoorOver: James River
1.9N 2E REDFIELD, Spink, SD
Built 1904 Load: 3.0 t ADT: 35
164TH STREET
PoorOver: FORDHAM CREEK
8N & 1.6W DOLAND, Spink, SD
Built 1935 Load: 3.0 t ADT: 11
206TH AVENUE
PoorOver: WHITEWATER CK
4.6S & 4W COTTONWOOD, Jackson, SD
Built 1985 Load: 3.2 t ADT: 15
228 ST
PoorOver: WEST FORK VERMILLION RV
5N & 0.1E HOWARD, Miner, SD
Built 1930 Load: 3.4 t ADT: 20
TWNSHP RD 187TH ST
PoorOver: COBB CK
2.3 E & 1 N BRANDT, Deuel, SD
Built 1908 Load: 3.6 t ADT: 25
485 AVENUE
PoorOver: CK
3E & 4.4S ALBEE, Grant, SD
Built 1948 Load: 3.6 t ADT: 35
231 ST
PoorOver: EAST FORK VERMILLION RV
2.3N & 1.2E WINFRED, Lake, SD
Built 1930 Load: 3.6 t ADT: 55
464 AVE
PoorOver: BATTLE CK
2E & 2.2N RUTLAND, Lake, SD
Built 1930 Load: 3.6 t ADT: 15
407 AVE
PoorOver: PEARL CK
7.6S 2W CAVOUR, Beadle, SD
Built 1911 Load: 3.9 t ADT: 56
Showing 5,001-5,050 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.