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

CTH O

Unknown

Over: STH 29

3.33M E JCT STH 107, Marathon, WI

Built 2013 ADT: 20,700

LRD MAPLE RIDGE RD

Unknown

Over: IH 39

2.0M N JCT STH 153 TO E, Marathon, WI

Built 2012 ADT: 29,800

LRD FOX GLOVE RD

Unknown

Over: IH 39 NB

AT FOX GLOVE RD, Marathon, WI

Built 2011 ADT: 32,700

PEDESTRIAN BRIDGE

Unknown

Over: STH 29 EB

BETWEEN CTH X - ALDEERSON, Marathon, WI

Built 2011 ADT: 26,000

CTH U

Unknown

Over: USH 51 NB

AT CTH U, Marathon, WI

Built 2013 ADT: 32,400

PEDESTRIAN

Unknown

Over: LRD AT MCLENNAN ST

0.1M N JCT STH 52, Marathon, WI

Built 1975 ADT: 2,000

SOO LINE

Unknown

Over: LRD MCMILLAN ST

0.1M W JCT STH 13, Marathon, WI

Built 1930 ADT: 1,050

USH 8-USH 141

Unknown

Over: LRD CRAIN LANE

AT JCT WITH USH 8, Marinette, WI

Built 1970 ADT: 50

SOO LINE

Unknown

Over: USH 8

2.6M E JCT CTH H, Marinette, WI

Built 1938 ADT: 1,500

CTH B, S COLEMAN C

Unknown

Over: USH 141

CTH B, Marinette, WI

Built 2005 ADT: 11,300

CTH Q

Unknown

Over: USH 141

CTH Q, Marinette, WI

Built 2005 ADT: 11,300

CTH CP

Unknown

Over: USH 141

CTH CP, Marinette, WI

Built 2005 ADT: 10,500

CTH Y

Unknown

Over: USH 41

AT Y, Marinette, WI

Built 2009 ADT: 10,900

LRD HALE RD

Unknown

Over: USH 41

AT HALE RD, Marinette, WI

Built 2008 ADT: 12,200

USH 41 NB

Unknown

Over: CTH B

ATUSH 41, Marinette, WI

Built 2009 ADT: 2,400

USH 41 SB

Unknown

Over: CTH B

AT USH 41, Marinette, WI

Built 2009 ADT: 1,400

USH 41 NB

Unknown

Over: LRD OLD PESHTIGO RD

AT USH 41, Marinette, WI

Built 2009 ADT: 1,400

USH 41 SB

Unknown

Over: LRD OLD PESHTIGO RD

AT USH 41, Marinette, WI

Built 2009 ADT: 1,400

USH 41 NB

Unknown

Over: LRD HAYNES RD

AT USH 41, Marinette, WI

Built 2009 ADT: 5,700

USH 41 SB

Unknown

Over: LRD HAYNES RD

AT USH 41, Marinette, WI

Built 2009 ADT: 5,700

STH 64

Unknown

Over: USH US 141

AT STH 64, Marinette, WI

Built 2014 ADT: 8,700

IH USH51-IH39 SB

Unknown

Over: LRD FAWN AVE

0.2M W JCT CTH M, Marquette, WI

Built 1966 ADT: 2,850

CTH D

Unknown

Over: IH USH 51-IH 39

4.2M N JCT STH 23 TO W, Marquette, WI

Built 1966 ADT: 18,400

LRD GROUSE DRIVE

Unknown

Over: IH USH 51-IH 39

5.2M N JCT STH 78 TO S, Marquette, WI

Built 1984 ADT: 16,100

IH USH51-IH39 NB

Unknown

Over: CTH O

4.7M E JCT STH 23 TO W, Marquette, WI

Built 1983 ADT: 980

IH USH51-IH39 SB

Unknown

Over: CTH O

AT JCT USH 51 SB, Marquette, WI

Built 1983 ADT: 980

IH USH51-IH39 NB

Unknown

Over: STH 23

3.9M E JCT CTH O TO N, Marquette, WI

Built 1984 ADT: 1,700

IH USH51-IH39 SB

Unknown

Over: STH 23

4.0M E JCT CTH O TO N, Marquette, WI

Built 1984 ADT: 1,700

IH USH51-IH39 NB

Unknown

Over: CTH CX

3.5M N JCT CTH O, Marquette, WI

Built 1984 ADT: 510

IH39 SB-USH51 SB-S

Unknown

Over: CTH CX

3.5M N JCT CTH O, Marquette, WI

Built 1984 ADT: 590

UNION PACIFIC RR

Unknown

Over: IH USH 51-IH 39

3.3M N JCT STH23 TO E, Marquette, WI

Built 1986 ADT: 15,000

IH USH51-IH39 NB

Unknown

Over: STH 23WB-STH 82EB

0.4M W JCT CTH M, Marquette, WI

Built 1986 ADT: 4,100

IH USH51-IH39 NB

Unknown

Over: LRD FAWN AVE

0.1M W JCT CTH M, Marquette, WI

Built 1986 ADT: 2,850

CTH M

Unknown

Over: IH USH 51-IH 39

4.2M N JCT STH 23 TO E, Marquette, WI

Built 1987 ADT: 12,800

LRD EDGEWOOD COURT

Unknown

Over: IH USH 51-IH 39

1.5M N JCT CTH M, Marquette, WI

Built 1987 ADT: 13,400

IH USH51-IH39 NB

Unknown

Over: CTH EAST SECOND ST/CTH J

VILLAGE OF WESTFIELD, Marquette, WI

Built 1987 ADT: 5,800

IH USH51-IH39 SB

Unknown

Over: CTH EAST SECOND ST(CTH J

VILLAGE OF WESTFIELD, Marquette, WI

Built 1987 ADT: 5,800

IH USH51-IH39 NB

Unknown

Over: LRD DOVER COURT

0.7M W JCT CTH H, Marquette, WI

Built 1987 ADT: 350

IH USH51-IH 39 SB

Unknown

Over: LRD DOVER COURT

0.6M W JCT CTH H, Marquette, WI

Built 1987 ADT: 350

IH USH51-IH39 NB

Unknown

Over: CTH Z

0.4M W JCT CTH H, Marquette, WI

Built 1987 ADT: 350

IH USH51-IH39 SB

Unknown

Over: CTH Z

0.4M W JCT CTH H, Marquette, WI

Built 1987 ADT: 350

IH USH 51 - IH 39

Unknown

Over: STH 23/82 EB & WB

3.5M E JCT CTH J, Marquette, WI

Built 2016 ADT: 4,100

CNW RR

Unknown

Over: CTH CX

3.2M N JCT CTH P, Marquette, WI

Built 1935 ADT: 400

CNW RR

Unknown

Over: LRD LAKEVIEW DR

1.4M W JCT CTH D, Marquette, WI

Built 1911 ADT: 175

CNW RR

Unknown

Over: LRD 2ND COURT

0.3M N JCT STH 82, Marquette, WI

Built 1911 ADT: 20

USH 18 - W BLUEMOU

Unknown

Over: STH 175 - STADIUM FREEWA

0.6M N JCT IH 94 TO E, Milwaukee, WI

Built 1955 ADT: 72,800

LRD N 35TH ST

Unknown

Over: IH 94-E-W FREEWAY

X 0.8M E JCT USH 41 TO S, Milwaukee, WI

Built 1961 ADT: 169,000

STH 57-GREEN BAY A

Unknown

Over: LRD W. SILVER SPRING DRI

0.8M JCT IH43, Milwaukee, WI

Built 1957 ADT: 22,800

IH 94-E-W FREEWAY

Unknown

Over: LRD N 32ND ST

0.6M S JCT USH 18, Milwaukee, WI

Built 1956 ADT: 2,500

LRD N 25TH ST

Unknown

Over: IH 94-E-W FREEWAY

X 1.5M E JCT USH 41 TO S, Milwaukee, WI

Built 1957 ADT: 145,000

Showing 1,301-1,350 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.