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

BOYLE LAKE ROAD

Good

Over: WEAVER & HARROFF DRAIN

5 MI E OF NEW TROY, Berrien, MI

Built 2009 Load: 32.7 t ADT: 165

HOLDEN ROAD

Good

Over: GALIEN RIVER

1 MI NW OF GALIEN, Berrien, MI

Built 2008 Load: 32.7 t ADT: 17

GIRARD ROAD

Good

Over: BUELL DRAIN #10

SHERWOOD TWP SEC 13-24, Branch, MI

Built 1989 Load: 32.7 t ADT: 461

MICHIGAN ROAD

Good

Over: COUNTY DRAIN #33

COLDWATER TWP SEC 2-3, Branch, MI

Built 1981 Load: 32.7 t ADT: 522

BOUND ROAD

Good

Over: WAISKA RIVER

6.5 MI N OF KINROSS, Chippewa, MI

Built 1985 Load: 32.7 t ADT: 500

EASTERDAY AVE.

Good

Over: ASHMUN CREEK

SAULT STE MARIE, Chippewa, MI

Built 1994 Load: 32.7 t ADT: 8,347

WRIGHT ROAD

Good

Over: MORRIS DRAIN

1/4 MI S OF PRICE RD, Clinton, MI

Built 2007 Load: 32.7 t ADT: 1,026

HOLLISTER ROAD

Good

Over: ALDER CREEK

AT WOODWORTH RD, Clinton, MI

Built 1994 Load: 32.7 t ADT: 2,020

TALLMAN ROAD

Good

Over: MORRIS DRAIN

0.2 MI S OF PRATT RD, Clinton, MI

Built 2003 Load: 32.7 t ADT: 101

US-2

Good

Over: STURGEON RIVER

1.0 MI W OF LORETTO, Dickinson, MI

Built 2003 Load: 32.7 t ADT: 5,743

COUNTY HWY 581

Good

Over: E BR STURGEON RIVER

2 MI N OF FELCH, Dickinson, MI

Built 1927 Load: 32.7 t ADT: 406

CAMP NO 3 ROAD

Good

Over: E BR STURGEON RIVER

2.5 MI N OF HARDWOOD, Dickinson, MI

Built 1988 Load: 32.7 t ADT: 44

M-100

Good

Over: THORNAPPLE DRAIN

3.5 MI N OF I-69, Eaton, MI

Built 2015 Load: 32.7 t ADT: 5,425

BROADWAY HWY

Good

Over: BATTLE CREEK RIVER

1 MI SW OF CHARLOTTE, Eaton, MI

Built 1985 Load: 32.7 t ADT: 148

KINSEL HWY

Good

Over: LACEY CREEK

3.5 MI SE OF VERMONTVILLE, Eaton, MI

Built 2000 Load: 32.7 t ADT: 137

LAMIE HWY

Good

Over: LACEY CREEK(POWERS DRN)

3 MI E OF VERMONTVILLE, Eaton, MI

Built 2004 Load: 32.7 t ADT: 25

LEROY STREET

Good

Over: SHIAWASSEE RIVER

BY FENTON MUNICIPAL BLD, Genesee, MI

Built 1906 Load: 32.7 t ADT: 10,918

CARPENTER ROAD

Good

Over: FLINT RIVER

BET BRAY & BRANCH ROADS, Genesee, MI

Built 1948 Load: 32.7 t ADT: 6,830

M-30

Good

Over: TOBACCO RIVER

0.3 MI N OF MIDLAND COL, Gladwin, MI

Built 2021 Load: 32.7 t ADT: 5,025

BADGER RD

Good

Over: LITTLE CEDAR RIVER

0.5 MI W OF DUNDAS RD, Gladwin, MI

Built 2000 Load: 32.7 t ADT: 82

PRESQUE ISLE ROAD

Good

Over: PLANTERS CREEK

SEC 4 WAKEFIELD TWP, Gogebic, MI

Built 1986 Load: 32.7 t ADT: 544

OLD US-2

Good

Over: MORRISON CREEK

SEC 16 WATERSMEET TWP, Gogebic, MI

Built 1993 Load: 32.7 t ADT: 130

GRANT ROAD

Good

Over: NORTH SHADE DRAIN

SEC 36 NEW HAVEN TWP, Gratiot, MI

Built 2004 Load: 32.7 t ADT: 615

GRANT ROAD

Good

Over: DRAIN #135

SEC 35 NEWARK TWP, Gratiot, MI

Built 2008 Load: 32.7 t ADT: 395

ST CHARLES ROAD

Good

Over: SHAD CREEK DRAIN

SEC 29-32 LAFAYETTE TWP, Gratiot, MI

Built 1980 Load: 32.7 t ADT: 164

MCCLELLAND ROAD

Good

Over: SHAD CREEK DRAIN

SEC 29-30 LAFAYETTE TWP, Gratiot, MI

Built 1981 Load: 32.7 t ADT: 132

RANSOM ROAD

Good

Over: SHAD CREEK DRAIN

SEC 32-33 LAFAYETTE TWP, Gratiot, MI

Built 1978 Load: 32.7 t ADT: 111

GRANT ROAD

Good

Over: BEAR CREEK DRAIN

SEC 32 NORTH STAR TWP, Gratiot, MI

Built 1979 Load: 32.7 t ADT: 99

MOORE ROAD

Good

Over: BEEBE CREEK

0.6 MILE E OF HOMER ROAD, Hillsdale, MI

Built 2007 Load: 32.7 t ADT: 689

FILION ROAD

Good

Over: EAST BR WILLOW RIVER DRN

SEC 16-21 BLOOMFIELD TWP, Huron, MI

Built 2005 Load: 32.7 t ADT: 645

OAK BEACH ROAD

Good

Over: TAFT DRAIN

SEC 20-29 HUME TWP, Huron, MI

Built 2005 Load: 32.7 t ADT: 390

SWAZYE ROAD

Good

Over: EAST BR WILLOW RIVER DRN

SEC 21-28 BLOOMFIELD TWP, Huron, MI

Built 1994 Load: 32.7 t ADT: 52

HARPER ROAD

Good

Over: MUD CREEK DRAIN

2.2 M N & .5 M E OF MASON, Ingham, MI

Built 1997 Load: 32.7 t ADT: 440

KANE ROAD

Good

Over: WEST CEDAR DRAIN

4.4 MI SE OF WEBBERVILLE, Ingham, MI

Built 2002 Load: 32.7 t ADT: 220

OLDS ROAD

Good

Over: PERRY CREEK

1 M S & 2.3 M W OF LESLIE, Ingham, MI

Built 2019 Load: 32.7 t ADT: 280

GREEN ROAD

Good

Over: LOWE LAKE DRAIN

1.2 MI SE OF STOCKBRIDGE, Ingham, MI

Built 2002 Load: 32.7 t ADT: 900

KEEFER HWY

Good

Over: SEBEWA CREEK

2 MI W OF PORTLAND 4 MI S, Ionia, MI

Built 1993 Load: 32.7 t ADT: 664

COWMAN ROAD

Good

Over: STOUGTON CREEK

0.25 MI W OF HUBBARDSTON, Ionia, MI

Built 1999 Load: 32.7 t ADT: 101

BLANCHARD ROAD

Good

Over: BACHELDER DRAIN

SEC 12 FREMONT TWP, Isabella, MI

Built 1994 Load: 32.7 t ADT: 2,855

BASE LINE ROAD

Good

Over: JOHN NEFF DRAIN

50 FT E OF MISSION RD, Isabella, MI

Built 2009 Load: 32.7 t ADT: 427

ROSEBUSH ROAD

Good

Over: SPRING CREEK

0.3 M W NE COR SEC 14 T15, Isabella, MI

Built 1999 Load: 32.7 t ADT: 1,860

VERNON ROAD

Good

Over: WALKER CREEK

0.2M E SW COR SEC 35 T16N, Isabella, MI

Built 1995 Load: 32.7 t ADT: 120

WINN ROAD

Good

Over: CEDAR CREEK

100 FT S NW COR SEC 27 T1, Isabella, MI

Built 2003 Load: 32.7 t ADT: 1,650

DEERFIELD ROAD

Good

Over: POTTER CREEK

NW COR SEC 33 CHIPPEWA, Isabella, MI

Built 1993 Load: 32.7 t ADT: 1,930

WING ROAD

Good

Over: CEDAR CREEK

SEC 34C DEERFIELD TWP, Isabella, MI

Built 1992 Load: 32.7 t ADT: 137

SOUTH COUNTY LINE

Good

Over: CEDAR DRAIN

SEC 35 S FREMONT TWP, Isabella, MI

Built 2004 Load: 32.7 t ADT: 47

VANDECAR ROAD

Good

Over: THATCHER CREEK

SEC 26-27 FREMONT TWP, Isabella, MI

Built 1997 Load: 32.7 t ADT: 74

ISABELLA ROAD

Good

Over: SOUTH BR SALT RIVER

SEC 13-14 ISABELLA TWP, Isabella, MI

Built 2006 Load: 32.7 t ADT: 185

M-99

Good

Over: S BR OF RICE CREEK

5.8 MILES S OF SPRINGPORT, Jackson, MI

Built 2012 Load: 32.7 t ADT: 1,900

TERRITORIAL ROAD

Good

Over: PORTAGE RIVER DRAIN

1 MI N 1 MI W OF MUNITH, Jackson, MI

Built 2002 Load: 32.7 t ADT: 1,470

Showing 6,801-6,850 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.