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

USH 51 NB

Unknown

Over: CTH WW

1.1M W JCT CTH K, Marathon, WI

Built 1974 ADT: 2,000

USH 51 SB

Unknown

Over: CTH WW

1.1M W JCT CTH K, Marathon, WI

Built 1974 ADT: 2,000

USH 51 NB

Unknown

Over: LRD MAINE DR

2.9M W JCT CTH K, Marathon, WI

Built 1974 ADT: 100

USH 51 SB

Unknown

Over: LRD MAINE DR

2.9M W JCT CTH K, Marathon, WI

Built 1974 ADT: 100

USH 51 NB

Unknown

Over: LRD RAINBOW DR

2.9M W JCT CTH K, Marathon, WI

Built 1974 ADT: 250

USH 51 SB

Unknown

Over: LRD RAINBOW DR

2.9M W JCT CTH K, Marathon, WI

Built 1974 ADT: 250

WCL RR

Unknown

Over: USH B51-GRAND AVE

0.1M N JCT STH 29 TO E, Marathon, WI

Built 1978 ADT: 16,800

CTH X

Unknown

Over: STH 29

2.5M E JCT USH 51 BUS, Marathon, WI

Built 1989 ADT: 15,800

LRD RYAN ST

Unknown

Over: STH 29

4.0M E JCT USH 51 BUS, Marathon, WI

Built 1989 ADT: 15,800

STH 29 EB

Unknown

Over: CTH J

0.8M S JCT CTH JJ, Marathon, WI

Built 1990 ADT: 4,700

STH 29 WB

Unknown

Over: CTH J

0.8M S JCT CTH JJ, Marathon, WI

Built 1990 ADT: 4,750

STH 29 EB

Unknown

Over: CTH Q

0.4M S JCT CTH JJ, Marathon, WI

Built 1990 ADT: 980

STH 29 WB

Unknown

Over: CTH Q

0.3M S JCT CTH JJ, Marathon, WI

Built 1990 ADT: 980

LRD MAPLE ROAD

Unknown

Over: STH 29 EB & WB

0.9M E JCT STH 13, Marathon, WI

Built 1998 ADT: 9,200

STH 97

Unknown

Over: STH 29 EB

3.0 M E JCT CTH E, Marathon, WI

Built 1999 ADT: 17,300

CTH H

Unknown

Over: STH 29

5.7M E JCT STH 97, Marathon, WI

Built 1997 ADT: 17,300

STH 29 EB

Unknown

Over: STH 13

1.5M N JCT CTH N, Marathon, WI

Built 1998 ADT: 10,700

STH 29 WB

Unknown

Over: STH 13

1.6M N JCT CTH N, Marathon, WI

Built 1998 ADT: 10,700

USH SB USH 51 ON R

Unknown

Over: USH 51 NB

AT 29, Marathon, WI

Built 2006 ADT: 31,400

STH EB STH29

Unknown

Over: STH 29

AT INTERSECTION, Marathon, WI

Built 2006 ADT: 4,500

STH 29 EB

Unknown

Over: USH 51

AT STH29, Marathon, WI

Built 2006 ADT: 62,800

USH 51NB/STH 29

Unknown

Over: CTH N

AT USH51, Marathon, WI

Built 2005 ADT: 19,100

USH 51SB/STH 29

Unknown

Over: CTH N

AT USH51, Marathon, WI

Built 2005 ADT: 20,000

LRD ROBIN LANE

Unknown

Over: IH39/USH51

0.4 MI. N JCT CTH N, Marathon, WI

Built 2005 ADT: 61,100

CTH NN

Unknown

Over: USH 51 NB-STH29

0.3 MI N. CTH N, Marathon, WI

Built 2006 ADT: 30,550

USH 51 NB

Unknown

Over: LRD SHERMAN ST

AT USH51, Marathon, WI

Built 2007 ADT: 10,000

USH 51SB

Unknown

Over: LRD SHERMAN AVE

AT USH51, Marathon, WI

Built 2007 ADT: 10,000

USH 51NB

Unknown

Over: LRD STEWART AVE

AT USH51NB, Marathon, WI

Built 2009 ADT: 8,900

USH 51 SB

Unknown

Over: LRD STEWART AVE

AT 51SB, Marathon, WI

Built 2007 ADT: 8,900

USH 51NB

Unknown

Over: STH 52

AT USH51, Marathon, WI

Built 2008 ADT: 17,800

USH 51 SB

Unknown

Over: STH 52

0.8M S JCT STH 52, Marathon, WI

Built 2007 ADT: 17,800

USH 51 NB EXIT RAM

Unknown

Over: LRD STEWET AVE

AT THE EXIT RAMP N USH51, Marathon, WI

Built 2010 ADT: 8,900

STH 29 EB

Unknown

Over: LRD 28TH AVENUE

AT STH 29 EB, Marathon, WI

Built 2008 ADT: 13,700

STH 29 WB

Unknown

Over: LRD 28TH AVENUE

AT STH 29 WB, Marathon, WI

Built 2008 ADT: 13,700

STH 29

Unknown

Over: LRD SHERMAN ST

AT 29, Marathon, WI

Built 2008 ADT: 7,900

USH 51NB TO29WB

Unknown

Over: USH51

AT INTERSECTION, Marathon, WI

Built 2008 ADT: 61,100

STH 29EB

Unknown

Over: LRD RAMP TO STEWART AVEN

WAUSAU, Marathon, WI

Built 2007 ADT: 3,700

STH29EB TO USH 51N

Unknown

Over: STH 29

AT INTERSECTION, Marathon, WI

Built 2010 ADT: 13,000

USH 51

Unknown

Over: USH 51

AT X STH29, Marathon, WI

Built 2010 ADT: 56,000

STH 29 WB SYSTEM R

Unknown

Over: STH 52

1.2M S, Marathon, WI

Built 2008 ADT: 17,800

USH RAMP USH51SB T

Unknown

Over: USH RAMP STH 52 TO USH S

2.1M, Marathon, WI

Built 2008 ADT: 4,900

USH STH 29WB RAMP

Unknown

Over: STH STEWART AVE.

AT STH 29WB SYSTEM RAMP, Marathon, WI

Built 2008 ADT: 7,400

STH 29 RAMP

Unknown

Over: LRD 28TH AVE

AT 29 RAMP, Marathon, WI

Built 2008 ADT: 13,700

LRD BRIDGE ST

Unknown

Over: USH 51

3.2M N, Marathon, WI

Built 2006 ADT: 38,600

STH 29WB

Unknown

Over: STH RAMP TO STEWART AVE

WAUSAU, Marathon, WI

Built 2007 ADT: 3,800

STH 29 EB SYSTEM R

Unknown

Over: LRD STEWART AVE

AT INTERSECTION, Marathon, WI

Built 2010 ADT: 8,900

USH 51 SB ENTRANCE

Unknown

Over: LRD STEWART AVE

0.2 MI. N. JCT STH 52, Marathon, WI

Built 2007 ADT: 8,900

CTH Y

Unknown

Over: STH 29

AT CTH Y, Marathon, WI

Built 2005 ADT: 13,000

IH 39 SB/USH 51

Unknown

Over: USH BUS 51

0.2 MI S JCT IMPERIAL AVE, Marathon, WI

Built 2013 ADT: 14,100

LRD KOWALSKI RD

Unknown

Over: IH 39

2.8M N STH153, Marathon, WI

Built 2008 ADT: 34,200

Showing 1,251-1,300 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.