State profile · Above median Poor share

Michigan bridge safety

According to the Federal Highway Administration's 2024 National Bridge Inventory, condition ratings, load ratings, and Poor-condition shares for every public highway bridge in Michigan.

11,371
Public bridges
33.7%
Good condition
11.3%
Poor condition

Michigan holds 11,371 public highway bridges (#25 of 52 by inventory) with a 11.27% Poor share (#9 of 52 by Poor share).

That is 11.3% of the state's inventory, against an average of 7.5% across the 54 states and territories with Poor-rated bridges on file, which places it 44 of 54 ordered from the lowest Poor share upward. A bridge is rated Poor when its weakest applicable component scores 4 or below on the inspecting agency's 0-9 scale, so the category is a maintenance and funding signal rather than a closure order or a live crossing-safety verdict.

Inventory: FHWA NBI 2024 · last ETL August 2026

Total Bridges

11,371

Public highway bridges in Michigan

Good Condition

33.7%

3,836 bridges rated 7-9

-16.3pp vs 50% benchmark

Poor Condition

11.3%

1,281 bridges whose lowest applicable component is rated 0-4

3.8pp vs national avg 7.5%

Michigan vs national bridge condition

Michigan - Good condition share 33.7%
National avg

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

Michigan - Poor-condition share 37.6%
National avg

Lower is better. Bar maxes at 30% (worst-state ceiling). National average sits at 7.5%.

Michigan in the national condition pattern

Each point is a state or territory in the FHWA NBI; the highlighted point is this profile.

Inventory size and Poor-condition share are different measures: Michigan has 11,371 bridges and a 11.3% Poor-condition share in the 2024 NBI, rank #44 of 54 jurisdictions ordered from the lowest share upward. The dashed comparisons mark the national average state rate and the midpoint of the plotted inventory range; neither is a live safety or closure threshold. Scatter plot of 54 data points. 0%10%20%30%40% 0k20k40k60k Public bridges in inventory (thousands) Poor-condition share (%) MI, Public bridges in inventory (thousands): 11.4k · Poor-condition share (%): 11.27%AL, Public bridges in inventory (thousands): 16.2k · Poor-condition share (%): 3.35%AK, Public bridges in inventory (thousands): 1.7k · Poor-condition share (%): 7.89%AZ, Public bridges in inventory (thousands): 8.6k · Poor-condition share (%): 1.15%AR, Public bridges in inventory (thousands): 13k · Poor-condition share (%): 5.43%CA, Public bridges in inventory (thousands): 25.8k · Poor-condition share (%): 5.91%CO, Public bridges in inventory (thousands): 9k · Poor-condition share (%): 4.82%CT, Public bridges in inventory (thousands): 4.4k · Poor-condition share (%): 4.72%DE, Public bridges in inventory (thousands): 0.9k · Poor-condition share (%): 1.26%DC, Public bridges in inventory (thousands): 0.3k · Poor-condition share (%): 1.95%FL, Public bridges in inventory (thousands): 13k · Poor-condition share (%): 2.79%GA, Public bridges in inventory (thousands): 15.1k · Poor-condition share (%): 1.59%GU, Public bridges in inventory (thousands): 0k · Poor-condition share (%): 12.77%HI, Public bridges in inventory (thousands): 1.2k · Poor-condition share (%): 6.53%ID, Public bridges in inventory (thousands): 4.6k · Poor-condition share (%): 4.9%IL, Public bridges in inventory (thousands): 26.9k · Poor-condition share (%): 9.35%IN, Public bridges in inventory (thousands): 19.5k · Poor-condition share (%): 5.22%IA, Public bridges in inventory (thousands): 23.7k · Poor-condition share (%): 19.16%KS, Public bridges in inventory (thousands): 24.9k · Poor-condition share (%): 5.26%KY, Public bridges in inventory (thousands): 14.5k · Poor-condition share (%): 7.37%LA, Public bridges in inventory (thousands): 12.7k · Poor-condition share (%): 11.48%ME, Public bridges in inventory (thousands): 2.5k · Poor-condition share (%): 15.41%MD, Public bridges in inventory (thousands): 5.5k · Poor-condition share (%): 4.56%MA, Public bridges in inventory (thousands): 5.3k · Poor-condition share (%): 8.88%MN, Public bridges in inventory (thousands): 13.5k · Poor-condition share (%): 4.44%MS, Public bridges in inventory (thousands): 16.7k · Poor-condition share (%): 6.03%MO, Public bridges in inventory (thousands): 24.6k · Poor-condition share (%): 8.95%MT, Public bridges in inventory (thousands): 5.2k · Poor-condition share (%): 6.81%NE, Public bridges in inventory (thousands): 15.4k · Poor-condition share (%): 7.9%NV, Public bridges in inventory (thousands): 2.1k · Poor-condition share (%): 1.14%NH, Public bridges in inventory (thousands): 2.5k · Poor-condition share (%): 7.51%NJ, Public bridges in inventory (thousands): 6.8k · Poor-condition share (%): 6.01%NM, Public bridges in inventory (thousands): 4k · Poor-condition share (%): 4.51%NY, Public bridges in inventory (thousands): 17.6k · Poor-condition share (%): 9.43%NC, Public bridges in inventory (thousands): 19.2k · Poor-condition share (%): 6.76%ND, Public bridges in inventory (thousands): 4.3k · Poor-condition share (%): 10.98%OH, Public bridges in inventory (thousands): 26.7k · Poor-condition share (%): 4.74%OK, Public bridges in inventory (thousands): 22.9k · Poor-condition share (%): 7.7%OR, Public bridges in inventory (thousands): 8.3k · Poor-condition share (%): 4.61%PA, Public bridges in inventory (thousands): 23.3k · Poor-condition share (%): 12.58%PR, Public bridges in inventory (thousands): 2.4k · Poor-condition share (%): 13.92%RI, Public bridges in inventory (thousands): 0.8k · Poor-condition share (%): 15.2%SC, Public bridges in inventory (thousands): 9.5k · Poor-condition share (%): 6.17%SD, Public bridges in inventory (thousands): 5.9k · Poor-condition share (%): 16.36%TN, Public bridges in inventory (thousands): 20.4k · Poor-condition share (%): 4.41%TX, Public bridges in inventory (thousands): 56.7k · Poor-condition share (%): 1.23%UT, Public bridges in inventory (thousands): 3.1k · Poor-condition share (%): 2.91%VT, Public bridges in inventory (thousands): 2.9k · Poor-condition share (%): 2.9%VI, Public bridges in inventory (thousands): 0k · Poor-condition share (%): 29.17%VA, Public bridges in inventory (thousands): 14.1k · Poor-condition share (%): 3.39%WA, Public bridges in inventory (thousands): 8.5k · Poor-condition share (%): 5.45%WV, Public bridges in inventory (thousands): 7.3k · Poor-condition share (%): 18.64%WI, Public bridges in inventory (thousands): 14.4k · Poor-condition share (%): 6.52%WY, Public bridges in inventory (thousands): 3.1k · Poor-condition share (%): 6.51%
Inventory size and Poor-condition share are different measures: Michigan has 11,371 bridges and a 11.3% Poor-condition share in the 2024 NBI, rank #44 of 54 jurisdictions ordered from the lowest share upward. The dashed comparisons mark the national average state rate and the midpoint of the plotted inventory range; neither is a live safety or closure threshold.

Michigan vs all states by public bridge inventory

Where this state's FHWA NBI public-highway bridge count sits among every state and territory on PlainBridges

11,371 25th of 54 higher than 29 of 54 states

States and territories, banded by public bridge inventory size

Each bar is a band; taller bars hold more states. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.

Source FHWA National Bridge Inventory · 2024

Read the rank neighborhood for Michigan

The highlighted point is Michigan: 11,371 bridges and 11.27% in Poor condition, rank #44 of 54 jurisdictions ordered from the lowest share upward. The five jurisdictions immediately above and below Michigan on that same Poor-share ordering:

  • New York: 17,642 bridges · 9.43% Poor
  • North Dakota: 4,255 bridges · 10.98% Poor
  • Michigan: 11,371 bridges · 11.27% Poor
  • Louisiana: 12,698 bridges · 11.48% Poor
  • Pennsylvania: 23,299 bridges · 12.58% Poor

The full national sortable table lives on the rankings page.

Material families in Michigan

Exclusive FHWA material families across all 11,371 bridges in this state; continuous variants fold into the parent family. Orthogonal to the Poor-share scatter above.

Who maintains Michigan’s inventory

State agency holds 40.0% of the 11,371 public highway bridges filed under Michigan in the 2024 NBI, the agency-of-record split for this state, not a condition verdict.

When Michigan’s bridges were built

Pre-1950 construction accounts for 13.1% of the 11,371 bridges with a recorded original year in Michigan. Era bands are orthogonal to the Poor-share ranking above.

Condition Distribution

Michigan33.7%55%11.3%GoodFairPoor
Bridge inventory deck-condition mix - Michigan (FHWA NBI)

Counties (83)

Alcona 27 Alger 53 Allegan 244 Alpena 32 Antrim 15 Arenac 80 Baraga 68 Barry 69 Bay 166 Benzie 25 Berrien 272 Branch 118 Calhoun 213 Cass 52 Charlevoix 18 Cheboygan 73 Chippewa 112 Clare 96 Clinton 216 Crawford 54 Delta 84 Dickinson 37 Eaton 200 Emmet 37 Genesee 371 Gladwin 63 Gogebic 104 Grand Traverse 33 Gratiot 167 Hillsdale 105 Houghton 58 Huron 192 Ingham 241 Ionia 119 Iosco 47 Iron 54 Isabella 183 Jackson 158 Kalamazoo 151 Kalkaska 15 Kent 523 Keweenaw 12 Lake 30 Lapeer 163 Leelanau 8 Lenawee 225 Livingston 165 Luce 28 Mackinac 63 Macomb 417 Manistee 35 Marquette 147 Mason 66 Mecosta 80 Menominee 96 Midland 139 Missaukee 39 Monroe 297 Montcalm 121 Montmorency 21 Muskegon 144 Newaygo 65 Oakland 508 Oceana 100 Ogemaw 31 Ontonagon 64 Osceola 103 Oscoda 15 Otsego 25 Ottawa 254 Presque Isle 37 Roscommon 43 Saginaw 315 Sanilac 171 Schoolcraft 54 Shiawassee 163 St. Clair 327 St. Joseph 132 Tuscola 242 Van Buren 129 Washtenaw 262 Wayne 1026 Wexford 64

Michigan 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 Michigan on the same metric.

NY

New York

9.43% top marginal rate
Structure
Progressive
Burden @ $100K
$17,642

ND

North Dakota

10.98% top marginal rate
Structure
Progressive
Burden @ $100K
$4,255
Selected

MI

Michigan

11.27% top marginal rate
Structure
Progressive
Burden @ $100K
$11,371

LA

Louisiana

11.48% top marginal rate
Structure
Progressive
Burden @ $100K
$12,698

PA

Pennsylvania

12.58% top marginal rate
Structure
Progressive
Burden @ $100K
$23,299

Bridges Needing Most Attention in Michigan

Six lowest-condition bridges in Michigan, ranked by the portal's composite display score. Inspection intervals are risk-based under current NBIS rules.

WOODLAND ROAD

Poor

Over: AU TRAIN RIVER

0.75 MI E OF AU TRAIN, Alger, MI

Built 1910 Load: 0.0 t

HAZE ROAD

Poor

Over: BETSIE RIVER

1 MI W OF THOMPSONVILLE, Benzie, MI

Built 1900 Load: 0.0 t ADT: 32

BRINK ROAD

Poor

Over: HOG CREEK DRAIN #40

BRONSON TWP SEC 28, Branch, MI

Built 1905 Load: 0.0 t ADT: 111

GOWER ROAD

Poor

Over: COLDWATER RIVER

UNION TWP SEC 10-15, Branch, MI

Built 1900 Load: 0.0 t ADT: 111

DEXTER TRAIL

Poor

Over: MUSKRAT CREEK

0.2 MI N OF CENTERLINE RD, Clinton, MI

Built 1980 Load: 0.0 t ADT: 136

COPPS MINE ROAD

Poor

Over: PRESQUE ISLE RIVER

SEC 28 MARENISCO TWP, Gogebic, MI

Built 1906 Load: 0.0 t ADT: 10

All Bridges in Michigan

MOSTETLER ROAD

Good

Over: MOSTETLER CREEK

SEC 25 HAYES TWP, Clare, MI

Built 2022 Load: 97.2 t ADT: 250

M-21

Good

Over: S FORK OF HAYWORTH CREEK

1.1 MI E OF LOWELL RD, Clinton, MI

Built 2005 Load: 97.2 t ADT: 4,192

WILCOX BRIDGE RD

Good

Over: EAST BRANCH OF AU SABLE

2 MI N OF GRAYLING, Crawford, MI

Built 2002 Load: 97.2 t ADT: 250

COUNTY ROAD I 26

Good

Over: TACOOSH RIVER

.5 M W .5 M N RAPID RIVER, Delta, MI

Built 2017 Load: 97.2 t ADT: 78

I-69

Good

Over: CARMEN CREEK

0.4 MI W OF HAMMERBERG RD, Genesee, MI

Built 1970 Load: 97.2 t ADT: 63,225

MT MORRIS RD

Good

Over: ARMSTRONG CREEK

BET JOHNSON AND ELMS RDS, Genesee, MI

Built 1986 Load: 97.2 t ADT: 7,156

BARD RD

Good

Over: N BR OF CEDAR RIVER

3.5 MI N OF M61, Gladwin, MI

Built 2000 Load: 97.2 t ADT: 430

US-2

Good

Over: GROESBECK CREEK

2.6 MI SE OF GOGEBIC STA, Gogebic, MI

Built 1927 Load: 97.2 t ADT: 977

COUNTY ROAD S10

Good

Over: DOUGLAS CREEK

.1 MI NORTH OF LAKE LINDE, Houghton, MI

Built 1981 Load: 97.2 t ADT: 150

CANBORO ROAD

Good

Over: WEST BR. PIGEON RIVER

SEC. 5-8 GRANT TWP., Huron, MI

Built 1970 Load: 97.2 t ADT: 75

X AVENUE

Good

Over: LITTLE PORTAGE CREEK

1 MI S 1.1 MI W OF FULTON, Kalamazoo, MI

Built 1997 Load: 97.2 t ADT: 163

M-37

Good

Over: MILL CREEK

4.0 MI N OF WALKER, Kent, MI

Built 1948 Load: 97.2 t ADT: 16,670

RED PINE DRIVE

Good

Over: SPRING CREEK

0.90 MI S OF 20 MILE RD, Kent, MI

Built 1986 Load: 97.2 t ADT: 981

CLYDE PARK AVE

Good

Over: BUCK CREEK

0.25 MILE S OF 76TH ST, Kent, MI

Built 1963 Load: 97.2 t ADT: 6,431

PETTIS AVE

Good

Over: HONEY CREEK

0.40 MI NW OF HONEY CREEK, Kent, MI

Built 1985 Load: 97.2 t ADT: 3,164

WINGEIER AVE

Good

Over: PRATT LAKE DRAIN

200 FT S OF 72ND ST, Kent, MI

Built 1966 Load: 97.2 t ADT: 234

THORNAPPLE RIV DRV

Good

Over: UNNAMED

0.35 MI N OF 60TH ST, Kent, MI

Built 1967 Load: 97.2 t ADT: 1,201

COLLEGE AVENUE

Good

Over: GRAND TRUNK RR

GRAND RAPIDS, Kent, MI

Built 2008 Load: 97.2 t ADT: 11,382

UNION STREET

Good

Over: NASH CREEK

0.14 MI N OF DIVISION ST, Kent, MI

Built 1937 Load: 97.2 t ADT: 1,625

M-26

Good

Over: OWLS CREEK BURIED

4.5 MI NE OF EAGLE RIVER, Keweenaw, MI

Built 1948 Load: 97.2 t ADT: 849

M-53

Good

Over: BRANCH BELLE RIVER

3.0 MI N OF ALMONT, Lapeer, MI

Built 2009 Load: 97.2 t ADT: 15,750

HOLLOW CORNERS RD

Good

Over: WEST POND CREEK

SEC. 6 ALMONT TWP., Lapeer, MI

Built 1970 Load: 97.2 t ADT: 125

IOSCO ROAD

Good

Over: W BR RED CEDAR RIVER DRN

SEC 17 IOSCO TWP, Livingston, MI

Built 1948 Load: 97.2 t ADT: 190

MACKINAC TRL FH41

Good

Over: CARP RIVER

2.5 MILES S OF M-134, Mackinac, MI

Built 1927 Load: 97.2 t ADT: 200

CUT RIVER ROAD

Good

Over: CUT RIVER

3 MI E OF EPOUFETTE, Mackinac, MI

Built 1985 Load: 97.2 t ADT: 250

23 MILE ROAD

Good

Over: MCBRIDE DRAIN

0.25 MILES WEST OF CARD, Macomb, MI

Built 2022 Load: 97.2 t ADT: 22,800

NORTH AVENUE

Good

Over: DEER CREEK

0.2 MI NO OF 24 MILE RD, Macomb, MI

Built 1976 Load: 97.2 t ADT: 10,080

NORTH AVE

Good

Over: COON CREEK

0.4 MI NORTH OF 27 MILE, Macomb, MI

Built 1978 Load: 97.2 t ADT: 6,460

31 MILE ROAD

Good

Over: TUPPER BROOK DRAIN

0.5 MI WEST OF NORTH AVE, Macomb, MI

Built 1964 Load: 97.2 t ADT: 420

HAYES ROAD

Good

Over: PRICE BROOK DRAIN

0.25 MI S OF 28 MILE RD, Macomb, MI

Built 1979 Load: 97.2 t ADT: 210

M-35

Good

Over: FIFTEEN CREEK

6.0 MI S OF PALMER, Marquette, MI

Built 1988 Load: 97.2 t ADT: 1,146

HL ROAD

Good

Over: REANY CREEK

2.0 MI SW OF 550 HWY, Marquette, MI

Built 1950 Load: 97.2 t ADT: 30

OG ROAD

Good

Over: NELSON CREEK

SELMA, Marquette, MI

Built 2017 Load: 97.2 t ADT: 40

VICTORY CORNER

Good

Over: S BR LINCOLN RIVER

4 MI W 3 MI N SCOTTVILLE, Mason, MI

Built 1978 Load: 97.2 t ADT: 250

US-131 NB

Good

Over: BUCKHORN CREEK

1.4 MI N OF 22 MI RD, Mecosta, MI

Built 1984 Load: 97.2 t ADT: 6,322

US-131 SB

Good

Over: BUCKHORN CREEK

1.4 MI N OF 22 MI RD, Mecosta, MI

Built 1984 Load: 97.2 t ADT: 6,322

EASTWOOD ROAD

Good

Over: PLUM CREEK

0.1 MI N OF DUNBAR ROAD, Monroe, MI

Built 2017 Load: 97.2 t ADT: 930

US-131 SB

Good

Over: HANDY CREEK

0.5 MI N OF EDGAR RD, Montcalm, MI

Built 1979 Load: 97.2 t ADT: 10,150

PARKDALE RD

Good

Over: STONY CREEK

BET ROCHESTER AND DEQUIND, Oakland, MI

Built 2011 Load: 97.2 t ADT: 15,500

SANDERSON AVE

Good

Over: AUGUSTA DRAIN

0.15 MI SW OF CASS AVE, Oakland, MI

Built 1969 Load: 97.2 t ADT: 4,220

US-31BR

Good

Over: RUSSELL CREEK

0.3 MI E OF US-31, Oceana, MI

Built 2020 Load: 97.2 t ADT: 8,800

US-131 NB

Good

Over: ROSE LAKE OUTLET

0.8 MI N OF MARION RD, Osceola, MI

Built 1975 Load: 97.2 t ADT: 5,863

MACKINAW TRAIL

Good

Over: WHITE PINE TRAIL

SECTION 14/23 T19N R10W, Osceola, MI

Built 2003 Load: 97.2 t ADT: 677

I-196

Good

Over: RUSH CREEK

0.1 MI W OF KENT CO LINE, Ottawa, MI

Built 1974 Load: 97.2 t ADT: 35,372

PECK ROAD

Good

Over: ELK CREEK DRAIN

SEC 30-31 ELK TWP, Sanilac, MI

Built 2023 Load: 97.2 t ADT: 1,538

MARLETTE ROAD

Good

Over: POTTS DRAIN

SEC 31 WASHINGTON TWP, Sanilac, MI

Built 1996 Load: 97.2 t ADT: 840

FRENCH LINE ROAD

Good

Over: CARTER DRAIN

SEC 20-29 ELMER TWP, Sanilac, MI

Built 1994 Load: 97.2 t ADT: 314

SMITHS CREEK ROAD

Good

Over: SMITHS CREEK

SEC 30-31 KIMBALL TWP, St. Clair, MI

Built 2016 Load: 97.2 t ADT: 1,080

HESSEN ROAD

Good

Over: SWAN CREEK

SEC. 2-3 IRA TWP., St. Clair, MI

Built 2017 Load: 97.2 t ADT: 150

KLETTNER ROAD

Good

Over: MOAK DRAIN

SEC 10 ST CLAIR TWP, St. Clair, MI

Built 2021 Load: 97.2 t ADT: 200

Showing 10,001-10,050 of 11,371 bridges

Related

All states → | National rankings → | Understanding conditions → | Retired SD term explained →
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.

What to do with this

Use Michigan's inventory picture to drill to a county or a specific span.

  • Browse counties in Michigan and open the highest-Poor shares first. County list
  • See where this state sits among peers on Poor-condition share. State rankings
  • Compare this state with another jurisdiction on the same measures. State compare

NBI condition ratings are inventory snapshots, not live crossing-safety verdicts.

Every figure on PlainBridges is rendered directly from federal source data, no number is typed in by an editor. Michigan Good/Fair/Poor shares and county rollups on this page are computed from the same NBI extract as the national boards; no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of 2024 NBI release. NBI condition categories reflect the latest reported inventory record, not a live safety, closure, or travel decision.