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
E MAIN ST,FAS 6488
PoorOver: BEAVER CK
0.4E BUFFALO GAP, Custer, SD
Built 1971 Load: 9.5 t ADT: 108
40480 285 STR.
PoorOver: CK
2N & 6.2W TRIPP, Hutchinson, SD
Built 1985 Load: 9.5 t ADT: 20
27310 BENSON RD
PoorOver: TWELVE MILE CK
MILLTOWN, Hutchinson, SD
Built 1987 Load: 9.5 t ADT: 45
MAITLAND ROAD
PoorOver: FALSE BOTTOM CK
0.7SW Christen & Maitland, Lawrence, SD
Built 1977 Load: 9.5 t ADT: 100
TOMAHAWK DR
PoorOver: DRAINAGE CHANNEL
175'W Cntry Club Dr - RC, Pennington, SD
Built 1977 Load: 9.5 t ADT: 125
174TH ST
PoorOver: CREEK
1S & 7.1W REDFIELD, Spink, SD
Built 1930 Load: 9.5 t ADT: 34
413th Avenue
PoorOver: Pearl Creek
1.9N & 2E of Yale, Beadle, SD
Built 1945 Load: 9.7 t ADT: 56
227 ST
PoorOver: CK
5S & 4.6E CARTHAGE, Miner, SD
Built 1925 Load: 9.7 t ADT: 61
383rd Avenue
PoorOver: Cain Creek
4.5N & 4.0W of Wolsey, Beadle, SD
Built 1924 Load: 9.8 t ADT: 56
399TH AVENUE
PoorOver: ENEMY CK
4.3S & 2E MT VERNON, Davison, SD
Built 1935 Load: 9.8 t ADT: 64
413TH Avenue
PoorOver: Creek
1.2 S & 3 W Andover, Day, SD
Built 1930 Load: 9.8 t ADT: 12
192nd Street
PoorOver: Hidewood Creek
1.3W & 2N of Estelline, Hamlin, SD
Built 1930 Load: 9.8 t ADT: 115
227th Street
PoorOver: White Clay Creek
14.5N & 0.2W Murdo, Jones, SD
Built 1965 Load: 9.8 t ADT: 21
478th Avenue
PoorOver: Trib. to E Brule Creek
6E & 1.2N of Beresford, Lincoln, SD
Built 1976 Load: 9.8 t ADT: 75
CITY STREET
PoorOver: CK
THIRD ST-DELL RAPIDS, Minnehaha, SD
Built 1952 Load: 9.8 t ADT: 160
MINNEKAHTA AVENUE
PoorOver: FALL RV
MINNEKAHTA&RIVER HOTSPNGS, Fall River, SD
Built 1934 Load: 9.9 t ADT: 588
159TH AVE
PoorOver: BOXELDER CK
1.6 W NEW UNDERWOOD, Pennington, SD
Built 1950 Load: 9.9 t ADT: 39
163 STREET
PoorOver: SOUTH FORK YELLOW BANK R
3.7W & 2S ALBEE, Grant, SD
Built 1930 Load: 10.0 t ADT: 98
144 STREET
PoorOver: NORTH FORK WHETSTONE RV
0.6E & 5N MILBANK, Grant, SD
Built 1965 Load: 10.0 t ADT: 52
161 STREET
PoorOver: S Fork Yellow Bank River
4.6E ALBEE, Grant, SD
Built 1940 Load: 10.0 t ADT: 52
242 STREET
PoorOver: CK
5.6E & 4N BELVIDERE, Jackson, SD
Built 1935 Load: 10.0 t ADT: 35
27620 457 AVE
PoorOver: VERMILLION RV
4W & 0.8N CHANCELLOR, Turner, SD
Built 1985 Load: 10.0 t ADT: 25
10 Mile Road
PoorOver: MEXICAN CK
7.4W & 10N PHILIP, Haakon, SD
Built 1950 Load: 10.1 t ADT: 58
IMPALA PL.
PoorOver: CK
2.9N & 21.3E STURGIS, Meade, SD
Built 1964 Load: 10.1 t ADT: 10
160 STREET
PoorOver: CK
1.1E & 1N LABOLT, Grant, SD
Built 1991 Load: 10.2 t ADT: 10
194th Street
PoorOver: Dolph Creek
6W & 1S of Lake Norden, Hamlin, SD
Built 1960 Load: 10.3 t ADT: 38
272nd Street
PoorOver: Beaver Creek
3.5W of Tea, Lincoln, SD
Built 1958 Load: 10.3 t ADT: 108
473RD AVENUE
PoorOver: CK
10.1N & 2E BROOKINGS, Brookings, SD
Built 1977 Load: 10.4 t ADT: 92
38840 278 ST
PoorOver: ANDES CK
2.0N & 3.6W OF ARMOUR, Douglas, SD
Built 1972 Load: 10.4 t ADT: 30
480th Avenue
PoorOver: Pattee Creek
6W & 2.5S of Fairview, Lincoln, SD
Built 1935 Load: 10.4 t ADT: 55
302 AVENUE
PoorOver: OKOBOJO CK
3.7N & 2.5W ONIDA, Sully, SD
Built 1962 Load: 10.4 t ADT: 20
422nd Avenue
PoorOver: Spain Ditch
5.9N & 3E of Langford, Marshall, SD
Built 1930 Load: 10.6 t ADT: 35
138th Street
PoorOver: N. Fork Whetstone Rv
2.8E & 1.8S of Wilmot, Roberts, SD
Built 1965 Load: 10.6 t ADT: 35
410TH AVE
PoorOver: BR FOSTER CREEK
4E & 7.7N BLOOMFIELD, Spink, SD
Built 1935 Load: 10.6 t ADT: 31
ELMORE RD
PoorOver: SPEARFISH CK
0.2KM WEST OF 14A, Lawrence, SD
Built 1901 Load: 10.7 t ADT: 50
487th Avenue
PoorOver: Flandreau Creek
1.7N & 6E of Flandreau, Moody, SD
Built 1982 Load: 10.7 t ADT: 15
468th Avenue
PoorOver: Creek
4W & 0.2S of Corona, Roberts, SD
Built 1967 Load: 10.7 t ADT: 20
479TH AVENUE
PoorOver: CK
2.2N & 1E WHITE, Brookings, SD
Built 1930 Load: 10.8 t ADT: 92
185 ST
PoorOver: SHAEFER CK
5.3 E & 12 N MILLER, Hand, SD
Built 1930 Load: 10.8 t ADT: 25
TWNSHP RD 480 AV
PoorOver: Mud Creek
4E & 5.4N TUNERVILLE, Deuel, SD
Built 1950 Load: 10.9 t ADT: 25
SCENIC ROAD
PoorOver: CHEYENNE RV
3.5E & 3.3S HOT SPRINGS, Fall River, SD
Built 1930 Load: 10.9 t ADT: 41
474 AVE
PoorOver: CK
3.0E & 5.8S TWIN BROOKS, Grant, SD
Built 1901 Load: 10.9 t ADT: 25
161 STREET
PoorOver: S Fork Yellow Bank River
4.4E ALBEE, Grant, SD
Built 1940 Load: 10.9 t ADT: 52
373rd Avenue
PoorOver: Snake Creek
11W & 1S of Warner, Brown, SD
Built 1929 Load: 11.0 t ADT: 98
425th Avenue
PoorOver: BURLINGTON NORTHERN RR
1.6E & 0.6S of Bristol, Day, SD
Built 1960 Load: 11.0 t ADT: 274
TWNSHP RD 186TH ST
PoorOver: COBB CK
4S & 5.1E CLEAR LAKE, Deuel, SD
Built 1950 Load: 11.0 t ADT: 45
231st Street
PoorOver: Trib. to Jack Moore Crk
2.0N & 5.3W of Egan, Moody, SD
Built 1950 Load: 11.0 t ADT: 10
238th Street
PoorOver: Trib. to Bachelor Creek
4.5E & 3S of Colman, Moody, SD
Built 1950 Load: 11.0 t ADT: 15
464th Avenue
PoorOver: Creek
3W & 1.9N of Wilmot, Roberts, SD
Built 1950 Load: 11.0 t ADT: 20
466th Avenue
PoorOver: Creek
3.5N & 1W of Wilmot, Roberts, SD
Built 1940 Load: 11.0 t ADT: 32
Showing 5,201-5,250 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.