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

KINNEVILLE ROAD

Fair

Over: GRAND RIVER

2 MI NW OF ONONDAGA, Ingham, MI

Built 1952 Load: 14.2 t ADT: 1,230

COUNTY ROAD I 24

Fair

Over: TACOOSH RIVER

1 M N 1 M W RAPID RIVER, Delta, MI

Built 1969 Load: 14.3 t ADT: 73

SAGINAW HWY

Fair

Over: SEBEWA CREEK

1.5 MI SE OF SUNFIELD, Eaton, MI

Built 1928 Load: 14.3 t ADT: 53

EAST STREET

Fair

Over: SHIAWASSEE RIVER

IN FENTON, Genesee, MI

Built 1974 Load: 14.3 t ADT: 1,385

RESCUE ROAD

Fair

Over: COLUMBIA DRAIN

SEC. 13-24 SEBEWAING TWP., Huron, MI

Built 1927 Load: 14.3 t ADT: 110

STILSON ROAD

Fair

Over: SETTER DRAIN

SEC11 12 13&14 FLYNN TWP, Sanilac, MI

Built 1979 Load: 14.3 t ADT: 170

HIBBARD ROAD

Fair

Over: BURGESS DRAIN

1.3 M NE OF BENNINGTON, Shiawassee, MI

Built 1968 Load: 14.3 t ADT: 1,137

TYRRELL RD

Fair

Over: AUSTIN CREEK

3 MI N & .3 MI E OF PERRY, Shiawassee, MI

Built 1965 Load: 14.3 t ADT: 271

GUENTHER RD

Fair

Over: MILL CREEK

LIMA TWP SEC 34, Washtenaw, MI

Built 1944 Load: 14.3 t ADT: 139

SECOND AVE

Fair

Over: LOWER ROUGE RIVER

IN CITY OF WAYNE, Wayne, MI

Built 1976 Load: 14.3 t ADT: 2,457

UPTON ROAD

Fair

Over: MAPLE RIVER BRANCH

.2 MI S OF MAPLE RAPIDS R, Clinton, MI

Built 1994 Load: 14.6 t ADT: 162

M-18

Fair

Over: FARM DRAIN

3.6 MI SW OF GLADWIN, Gladwin, MI

Built 1937 Load: 14.6 t ADT: 5,052

E MAIN STREET

Fair

Over: PRAIRIE RIVER

IN BURR OAK, St. Joseph, MI

Built 1957 Load: 14.6 t ADT: 610

GARFIELD ROAD

Fair

Over: WHITE FEATHER CREEK

0.5 MI N OF W CODY ESTEY, Bay, MI

Built 1959 Load: 14.6 t ADT: 50

NO DATA ENTERED

Fair

Over: BEAVER CREEK

T45N R17W SEC. 18, Schoolcraft, MI

Built 1996 Load: 14.6 t ADT: 50

3332

Fair

Over: CARP RIVER

3.062 WEST ON 3332, Mackinac, MI

Built 1951 Load: 14.6 t ADT: 15

SHELL RD

Fair

Over: LITTLE SUGAR RIVER

20 RODS S OF SOUTHWELL RD, Gladwin, MI

Built 1976 Load: 14.7 t ADT: 125

N DR SO

Fair

Over: NOTTAWA CREEK

BURLINGTON TWP SEC 4, Calhoun, MI

Built 1977 Load: 14.8 t ADT: 692

STEPHAN BRIDGE RD

Fair

Over: AU SABLE RIVER

7.0 MI NE OF GRAYLING, Crawford, MI

Built 1900 Load: 14.9 t ADT: 560

MT MORRIS ROAD

Fair

Over: BUTTERNUT CREEK

BET GENESEE & VASSAR ROAD, Genesee, MI

Built 1927 Load: 14.9 t ADT: 3,115

PECK LAKE ROAD

Fair

Over: COUNTY DRAIN

4.0 MI S 2.5 MI E IONIA, Ionia, MI

Built 1982 Load: 14.9 t ADT: 108

PATTERSON ROAD

Fair

Over: S FORK OF N BR CASS RIV

SEC 16-17 AUSTIN TWP, Sanilac, MI

Built 1985 Load: 14.9 t ADT: 150

BUNO ROAD

Fair

Over: HURON RIVER

MILFORD TWP SEC 28, Oakland, MI

Built 1940 Load: 15.0 t ADT: 750

M-63

Fair

Over: CSX RR & WHITWAM DRIVE

IN ST JOSEPH, Berrien, MI

Built 2000 Load: 15.2 t ADT: 11,171

FISKE ROAD

Fair

Over: SAUK RIVER

COLDWATER TWP SEC 25-26, Branch, MI

Built 1963 Load: 15.2 t ADT: 500

ROBERT T LONGWAY

Fair

Over: FLINT RIVER

IN CITY OF FLINT, Genesee, MI

Built 1994 Load: 15.2 t ADT: 18,849

POLEGATE RD

Fair

Over: MOLASSES RIVER

61 RODS E OF HERNER RD, Gladwin, MI

Built 1918 Load: 15.2 t ADT: 155

FARVER ROAD

Fair

Over: WEST BR. PIGEON RIVER

SEC. 8-9 GRANT TWP., Huron, MI

Built 1920 Load: 15.2 t ADT: 20

FAUSSETT ROAD

Fair

Over: YELLOW RIVER DRAIN

SEC 28-33 DEERFIELD TWP, Livingston, MI

Built 1938 Load: 15.2 t ADT: 2,030

PEALER STREET

Fair

Over: RAILROAD DR & CONRAIL RR

ONE BLOCK W OF MAIN ST, St. Joseph, MI

Built 1981 Load: 15.2 t ADT: 2,700

BEAVERTON ROAD

Fair

Over: BAILEY CREEK

SHERIDAN TWP SEC 10-15, Clare, MI

Built 2002 Load: 15.2 t ADT: 1,430

ALLEGAN DAM RD

Fair

Over: KALAMAZOO RIVER

0.35 MI W OF 41ST ST, Allegan, MI

Built 1930 Load: 15.2 t ADT: 50

TALLMAN ROAD

Fair

Over: LOOKING GLASS RIVER

0.1 MI S OF HERBISON, Clinton, MI

Built 1996 Load: 15.6 t ADT: 359

OLD BRIDGE ROAD

Fair

Over: THREAD CREEK

IN GRAND BLANC, Genesee, MI

Built 1960 Load: 15.6 t ADT: 2,497

WOODBRIDGE ROAD

Fair

Over: THREAD CREEK

IN GRAND BLANC, Genesee, MI

Built 1961 Load: 15.6 t ADT: 1,276

27.25 MILE ROAD

Fair

Over: LITTLE CEDAR RIVER

3 MI. N OF DAGGETT, Menominee, MI

Built 1965 Load: 15.6 t ADT: 51

SQUIRREL RD NB

Fair

Over: M-59

PONTIAC TWP SEC 25, Oakland, MI

Built 1999 Load: 15.6 t ADT: 12,630

FRENCH LINE ROAD

Fair

Over: BLACK RIVER I/C DRAIN

SEC 23-26 WASHINGTON TWP, Sanilac, MI

Built 1992 Load: 15.6 t ADT: 510

ROSELAWN COURT

Fair

Over: CANAL PARALLEL TO M 29

.1MI E OF ST CLAIR RIV DR, St. Clair, MI

Built 1979 Load: 15.6 t ADT: 234

SERGENT ROAD

Fair

Over: DEAD CREEK

SEC 7 ARBELA TWP, Tuscola, MI

Built 1979 Load: 15.6 t ADT: 80

PIOTTER HWY

Fair

Over: SWAMP RAISIN DRAIN

0.1 MI S OF LABERDEE RD, Lenawee, MI

Built 1974 Load: 15.6 t ADT: 155

ARMS ROAD

Fair

Over: VAN WERT DRAIN

AT N FINN ROAD, Bay, MI

Built 1956 Load: 15.6 t ADT: 50

112TH AVE

Fair

Over: SWAN CREEK

APPROX 0.10 MI W OF 46TH, Allegan, MI

Built 1964 Load: 15.9 t ADT: 288

Q DRIVE SOUTH

Fair

Over: NOTTAWA CREEK

4 MI NE OF ATHENS, Calhoun, MI

Built 1920 Load: 15.9 t ADT: 159

RIVERSIDE DRIVE

Fair

Over: DOWAGIAC CREEK

0.2 MI SOUTH OF DIVISION, Cass, MI

Built 1984 Load: 15.9 t ADT: 2,065

US-23

Fair

Over: ELLIOT CREEK

4.1 MI E OF CHEBOYGAN, Cheboygan, MI

Built 1937 Load: 15.9 t ADT: 977

MCCANDLISH ROAD

Fair

Over: THREAD RIVER

BET IRISH & GALE ROAD, Genesee, MI

Built 1934 Load: 15.9 t ADT: 1,163

BLISS ROAD

Fair

Over: NORTH SHADE DRAIN

SEC 2-3 NORTH SHADE TWP, Gratiot, MI

Built 1981 Load: 15.9 t ADT: 126

GAETH ROAD

Fair

Over: COLUMBIA DRAIN

SEC. 14 SEBEWAING TWP., Huron, MI

Built 1927 Load: 15.9 t ADT: 25

D AVENUE

Fair

Over: GULL LAKE OUTLET

IN YORKVILLE S OF GULL LK, Kalamazoo, MI

Built 1984 Load: 15.9 t ADT: 1,247

Showing 101-150 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.