State profile · Near national median SD

Wisconsin bridge safety

Condition ratings, load ratings, and structural-deficiency data for every public highway bridge in Wisconsin — drawn straight from the FHWA National Bridge Inventory.

14,851
Public bridges
41.3%
Good condition
6.1%
Poor condition
6.1%
Structurally deficient

Total Bridges

14,851

Public highway bridges in Wisconsin

Good Condition

41.3%

6,130 bridges rated 7-9

-8.7pp vs 50% benchmark

Poor Condition

6.1%

911 bridges rated 0-4

Structurally Deficient

6.1%

911 bridges flagged for repair priority

-0.9pp vs national avg 7.0%

Wisconsin vs national bridge condition

Wisconsin — Good condition share 41.3%
National avg

Share of bridges rated 7-9 on the FHWA 0-9 scale (deck, superstructure, substructure all good).

Wisconsin — Structurally deficient share 20.4%
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 — Wisconsin (FHWA NBI)

Wisconsin41.2766817049357%33.10214800350145%GoodFairPoorStructurally Deficient
Bridge inventory deck-condition mix — Wisconsin (FHWA NBI)

Counties (72)

Adams 43 Ashland 92 Barron 321 Bayfield 103 Brown 478 Buffalo 239 Burnett 68 Calumet 63 Chippewa 366 Clark 297 Columbia 191 Crawford 212 Dane 624 Dodge 219 Door 32 Douglas 143 Dunn 252 Eau Claire 242 Florence 20 Fond du Lac 256 Forest 54 Grant 385 Green 249 Green Lake 50 Iowa 212 Iron 52 Jackson 220 Jefferson 186 Juneau 174 Kenosha 121 Kewaunee 93 La Crosse 250 Lafayette 217 Langlade 78 Lincoln 158 Manitowoc 272 Marathon 534 Marinette 136 Marquette 85 Menominee 25 Milwaukee 1005 Monroe 385 Oconto 149 Oneida 64 Outagamie 300 Ozaukee 107 Pepin 57 Pierce 248 Polk 77 Portage 192 Price 104 Racine 143 Richland 298 Rock 325 Rusk 152 Sauk 277 Sawyer 98 Shawano 162 Sheboygan 249 St. Croix 308 Taylor 176 Trempealeau 260 Vernon 333 Vilas 29 Walworth 209 Washburn 54 Washington 166 Waukesha 380 Waupaca 172 Waushara 54 Winnebago 264 Wood 242

Wisconsin 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 Wisconsin on the same metric.

28

Mississippi

5.92% top marginal rate
Structure
Progressive
Burden @ $100K
$16,823

45

South Carolina

6.10% top marginal rate
Structure
Progressive
Burden @ $100K
$5,396
Selected

55

Wisconsin

6.13% top marginal rate
Structure
Progressive
Burden @ $100K
$14,851

37

North Carolina

6.16% top marginal rate
Structure
Progressive
Burden @ $100K
$18,901

15

Hawaii

6.47% top marginal rate
Structure
Progressive
Burden @ $100K
$1,206

Bridges Needing Most Attention in Wisconsin

Six lowest-condition bridges in Wisconsin, ranked by composite NBI rating. Each is inspected at least every 24 months.

LRD MARKET RD

Poor

Over: BEAR CREEK

1.2M N JCT STH 76, Outagamie, WI

Built 1958 Load: 1.6 t ADT: 1,175

LRD WOODFORD DR

Poor

Over: RAILS TO TRAILS TRAIL

0.3M E JCT USH 45, Washington, WI

Built 1910 Load: 1.6 t ADT: 47

LRD ACCESS RD

Poor

Over: MENASHA CHANNEL

ACCESS TO PARKING LOT BY, Winnebago, WI

Built 1960 Load: 1.6 t ADT: 20

CTH A

Structurally Deficient

Over: UNION PACIFIC RR

1.0M W JCT STH 73, Columbia, WI

Built 1910 Load: 3.2 t ADT: 197

LRD OLD 64 (DEAD E

Structurally Deficient

Over: EVERGREEN CREEK

0.1M N JCT STH 64, Langlade, WI

Built 1916 Load: 3.2 t ADT: 6

LRD CORNELL LANE (

Structurally Deficient

Over: BR COON CREEK

0.1M E JCT USH 14, Vernon, WI

Built 1985 Load: 3.2 t ADT: 10

All Bridges in Wisconsin

IH 43 NB

Unknown

Over: USH 10 WB-STH 310

1.0M W JCT STH 310 TO E, Manitowoc, WI

Built 1978 ADT: 5,600

LRD ROCKWOOD RD

Unknown

Over: IH 43

1.0M N JCT USH 10 TO W, Manitowoc, WI

Built 1977 ADT: 22,200

LRD REIFS MILL RD

Unknown

Over: IH 43

2.0M N JCT USH 10 TO W, Manitowoc, WI

Built 1978 ADT: 20,900

CTH V HILLCREST

Unknown

Over: IH 43

3.0M N JCT USH 10 TO W, Manitowoc, WI

Built 1977 ADT: 20,900

LRD HIDDEN VALLEY

Unknown

Over: IH 43

8.7M N JCT USH 10 TO W, Manitowoc, WI

Built 1977 ADT: 19,200

LRD POLIFKA RD

Unknown

Over: IH 43

4.0M N JCT USH 10 TO W, Manitowoc, WI

Built 1977 ADT: 20,000

CTH P

Unknown

Over: IH 43-USH 10

4.5M N JCT USH 151, Manitowoc, WI

Built 1978 ADT: 22,200

IH 43 SB

Unknown

Over: CTH K

1.7M E JCT CTH T, Manitowoc, WI

Built 1977 ADT: 440

IH 43 NB

Unknown

Over: CTH K

2.0M E JCT CTH H, Manitowoc, WI

Built 1977 ADT: 440

LRD FISCHERVILLE R

Unknown

Over: IH 43

6.3M N JCT USH 10 TO W, Manitowoc, WI

Built 1977 ADT: 19,200

LRD ZANDER RD

Unknown

Over: IH 43

2.5M N JCT STH 147, Manitowoc, WI

Built 1979 ADT: 19,200

LRD GREENSTREET RD

Unknown

Over: IH 43

7.2M N JCT USH 10 TO W, Manitowoc, WI

Built 1977 ADT: 19,200

IH 43 SB

Unknown

Over: STH 147

AT JCT STH 147-IH 43, Manitowoc, WI

Built 1977 ADT: 3,600

IH 43 NB

Unknown

Over: STH 147

AT JCT STH 147-IH 43, Manitowoc, WI

Built 1977 ADT: 3,600

IH 43 SB

Unknown

Over: LRD SCHLEY RD

0.3M E JCT CTH R, Manitowoc, WI

Built 1979 ADT: 100

IH 43 NB

Unknown

Over: LRD SCHLEY RD

1.2M E JCT CTH T, Manitowoc, WI

Built 1979 ADT: 100

IH 43 NB

Unknown

Over: CTH T-MARIBEL RD

2.3M N JCT CTH Z, Manitowoc, WI

Built 1979 ADT: 780

IH 43 SB

Unknown

Over: CTH T-MARIBEL RD

2.9M N JCT CTH Z, Manitowoc, WI

Built 1979 ADT: 780

IH 43 SB

Unknown

Over: LRD ROSECRANS RD

3.1M N JCT CTH Z, Manitowoc, WI

Built 1979 ADT: 300

IH 43 NB

Unknown

Over: LRD ROSECRANS RD

2.3M N JCT CTH Z, Manitowoc, WI

Built 1979 ADT: 300

LRD 18TH ST

Unknown

Over: LRD SPRING ST CONNECTOR

0.6M W JCT USH 10 TO E, Manitowoc, WI

Built 1978 ADT: 99

IH 43 SB

Unknown

Over: LRD CENTER ROAD

0.8M E JCT CTH N, Manitowoc, WI

Built 1978 ADT: 200

IH 43 NB

Unknown

Over: LRD CENTER ROAD

0.9M E JCT CTH N, Manitowoc, WI

Built 1978 ADT: 200

USH 10 W

Unknown

Over: LRD WHITEWATER DR

AT USH 10W, Manitowoc, WI

Built 1979 ADT: 100

USH 10 EB

Unknown

Over: LRD WHITEWATER DR

AT US 10 EB, Manitowoc, WI

Built 1979 ADT: 100

WISCONSIN CENTRAL

Unknown

Over: LRD DEWEY STREET

0.5M E 35TH STREET, Manitowoc, WI

Built 1980 ADT: 9,200

IH 43 SB

Unknown

Over: LRD NEWTON RD

0.1M W JCT CTH CR, Manitowoc, WI

Built 2017 ADT: 250

CNW RR

Unknown

Over: LRD MEADOW LN

0.4M E JCT CTH R, Manitowoc, WI

Built 1911 ADT: 265

CNW RR

Unknown

Over: LRD HOSTAK RD

1.0M S JCT CTH R, Manitowoc, WI

Built 1913 ADT: 50

STH 29 WB

Unknown

Over: USH 51 BUS

2.9M N JCT USH 51, Marathon, WI

Built 1971 ADT: 18,400

LRD VOLKMAN STREET

Unknown

Over: STH 29

0.5M E JCT USH 51 BUS, Marathon, WI

Built 1989 ADT: 28,400

LRD ALDERSON ST

Unknown

Over: STH 29

1.5M E JCT USH 51 BUS, Marathon, WI

Built 1989 ADT: 28,400

STH 153-MAIN ST

Unknown

Over: LRD DEPOT ST

0.4M N JCT STH 153, Marathon, WI

Built 1963 ADT: 20

LRD SUNRISE LN

Unknown

Over: STH 29

1.1M E JCT USH 51 TO S, Marathon, WI

Built 1972 ADT: 42,300

STH 107

Unknown

Over: STH 29

3.0M E JCT CTH S, Marathon, WI

Built 1992 ADT: 16,800

STH 29 EB

Unknown

Over: LRD 72ND AVE

2.7M S JCT CTH U, Marathon, WI

Built 1971 ADT: 7,400

STH 29 EB

Unknown

Over: LRD 48TH AVE

1.8M W JCT STH 52, Marathon, WI

Built 1971 ADT: 1,000

STH 29 WB

Unknown

Over: LRD 48TH AVE

1.8M W JCT STH 52, Marathon, WI

Built 1971 ADT: 1,000

STH 29 WB

Unknown

Over: LRD 72ND AVE

2.7M S JCT CTH U, Marathon, WI

Built 1971 ADT: 8,700

STH 29 EB

Unknown

Over: USH 51 BUS

2.9M N JCT USH 51, Marathon, WI

Built 1971 ADT: 18,400

CTH C

Unknown

Over: IH USH 51-IH 39

3.1M N JCT CTH DB TO E, Marathon, WI

Built 1972 ADT: 22,697

STH 34

Unknown

Over: IH USH 51-IH 39

4.5M N JCT CTH DB TO E, Marathon, WI

Built 1972 ADT: 29,500

LRD LOCKER RD

Unknown

Over: IH USH 51-IH 39

1.1M N JCT STH 34 TO S, Marathon, WI

Built 1972 ADT: 29,500

IH USH 51-IH 39 SB

Unknown

Over: STH 153

1.4M E JCT CTH B, Marathon, WI

Built 1973 ADT: 10,300

IH USH 51-IH 39 NB

Unknown

Over: STH 153

1.4M E JCT CTH B, Marathon, WI

Built 1972 ADT: 10,300

USH 51 NB

Unknown

Over: USH B51 SB

0.4M S JCT USH 51, Marathon, WI

Built 1975 ADT: 10,500

USH 51 SB

Unknown

Over: USH B51 SB & EBCTH K

0.4M S JCT USH 51, Marathon, WI

Built 1975 ADT: 10,500

USH 51 NB

Unknown

Over: LRD DECATOR DR

0.5M W JCT CTH K, Marathon, WI

Built 1975 ADT: 380

USH 51 SB

Unknown

Over: LRD DECATOR DR

0.5M W JCT CTH K, Marathon, WI

Built 1975 ADT: 2,100

LRD FALCON DR

Unknown

Over: USH 51

4.3M N JCT STH 29 TO W, Marathon, WI

Built 1974 ADT: 20,900

Showing 1,201-1,250 of 14,851 bridges

Related

All states → | National rankings → | Understanding conditions → | SD bridges explained →
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.