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

104TH AVE

Poor

Over: BLACK CREEK

SECTION 14 HOLLAND TWP, Ottawa, MI

Built 1976 Load: 14.9 t ADT: 5,243

MCKEIGHAN ROAD

Poor

Over: PICKEREL CREEK

0.9 MI N OF FERGUS ROAD, Saginaw, MI

Built 1973 Load: 14.9 t ADT: 900

MOORISH ROAD

Poor

Over: PINE RUN CREEK

0.1 MI N OF GARY ROAD, Saginaw, MI

Built 1931 Load: 14.9 t ADT: 176

LONG ISLAND COURT

Poor

Over: UNNAMED CANAL

SEC. 22 IRA TWP, St. Clair, MI

Built 1982 Load: 14.9 t ADT: 350

DENVER ROAD

Poor

Over: NORTH BR SALT RIVER

SEC 4-9 DENVER TWP, Isabella, MI

Built 1937 Load: 15.1 t ADT: 185

BALDWIN ROAD

Poor

Over: SWARTZ CREEK

BET FENTON & GRAYTRAX RD, Genesee, MI

Built 1938 Load: 15.2 t ADT: 12,678

SHAFFER ROAD

Poor

Over: BLUFF CREEK

0.35 MI E OF GENEVA RD, Midland, MI

Built 1930 Load: 15.2 t ADT: 1,430

SIX MILE ROAD

Poor

Over: EN HINES DRIVE

NORTHVILLE T W/NORTHV RD, Wayne, MI

Built 1933 Load: 15.2 t ADT: 9,326

F DR S

Poor

Over: S BR KALAMAZOO RIVER

ALBION TWP SEC 17, Calhoun, MI

Built 1959 Load: 15.3 t ADT: 388

CRUZEN ROAD

Poor

Over: SO BRANCH OF PINE RIVER

2.0 MI W 1.2 MI S MIKADO, Alcona, MI

Built 1984 Load: 15.6 t ADT: 339

N DOWN RIVER RD

Poor

Over: BIG CREEK

18.0 MI NE OF GRAYLING, Crawford, MI

Built 1948 Load: 15.6 t ADT: 261

M-43

Poor

Over: RED CEDAR RIVER

4.4 MI W OF WILLIAMSTON, Ingham, MI

Built 1924 Load: 15.6 t ADT: 13,900

RANGER HWY

Poor

Over: LIME CRK

0.2 MI N OF RIDGEVILLE RD, Lenawee, MI

Built 1982 Load: 15.6 t ADT: 162

BOWDISH ROAD

Poor

Over: UNNAMED CREEK

SEC 32 UNADILLA TWP, Livingston, MI

Built 1937 Load: 15.6 t ADT: 54

SANBORN STREET

Poor

Over: BLACK RIVER

CITY OF CROSWELL, Sanilac, MI

Built 1974 Load: 15.6 t ADT: 850

CONNELL ROAD

Poor

Over: SHEEHY DRAIN

SEC. 27 BROCKWAY TWP., St. Clair, MI

Built 1979 Load: 15.6 t ADT: 160

BORDEN RD

Poor

Over: PRAIRIE CREEK

1.5 MI S OF PALO & 1.2 E, Ionia, MI

Built 1927 Load: 15.9 t ADT: 462

MORRIS ROAD

Poor

Over: SOUTH BR. FLINT RIVER

SEC. 9-10 LAPEER TWP., Lapeer, MI

Built 1967 Load: 15.9 t ADT: 4,300

DUNHAM ROAD

Poor

Over: ORE CREEK

SEC 15-22 HARTLAND TWP, Livingston, MI

Built 1923 Load: 15.9 t ADT: 730

ALLEN ROAD

Poor

Over: BOGUE CREEK

SEC 35 COHOCTAH TWP, Livingston, MI

Built 1958 Load: 15.9 t ADT: 310

KELLY ROAD

Poor

Over: MUDDY CREEK

0.1 MI W OF COUSINO ROAD, Monroe, MI

Built 1986 Load: 15.9 t ADT: 280

JONES ROAD

Poor

Over: WANADOGA CREEK

1.3 MI E OF M-66, Barry, MI

Built 1970 Load: 15.9 t ADT: 100

ROUTE 577

Poor

Over: LITTLE RIVER

2.5 MI W OF BIRCH CREEK, Menominee, MI

Built 1920 Load: 16.1 t ADT: 216

GLENDORA ROAD

Poor

Over: E BR GALIEN RIVER

7 MI NW OF BUCHANAN, Berrien, MI

Built 1954 Load: 16.2 t ADT: 1,017

WALKER ROAD

Poor

Over: N BRANCH OF FORD RIVER

0.5 MI E OF ALFRED, Dickinson, MI

Built 1957 Load: 16.2 t ADT: 10

64TH STREET

Poor

Over: M BR PERE MARQUETTE RIV.

2 MI S 0.5 M W OF NIRVANA, Lake, MI

Built 1909 Load: 16.2 t ADT: 34

WILDER ROAD

Poor

Over: SOUTH BR. FLINT RIVER

SEC. 1 METAMORA TWP., Lapeer, MI

Built 1938 Load: 16.2 t ADT: 165

MAGRUDDER ROAD

Poor

Over: LITTLE SALT CREEK

@ BRADFORD RD, Midland, MI

Built 1936 Load: 16.2 t ADT: 90

MIXER ROAD

Poor

Over: CEDAR CREEK

0.7 MI E OF M-37, Barry, MI

Built 1970 Load: 16.2 t ADT: 100

HUFF ROAD

Poor

Over: WANADOGA CREEK

0.28 MI E OF M-66, Barry, MI

Built 1970 Load: 16.2 t ADT: 100

KING ROAD

Poor

Over: WHITEFISH RIVER

6 MI NW OF TRAUNIK, Alger, MI

Built 1910 Load: 16.3 t ADT: 50

COATS ROAD

Poor

Over: BATTLE CREEK RIVER

7 MI E OF OLIVET, Eaton, MI

Built 1923 Load: 16.3 t ADT: 200

OC ROAD (OLD US41)

Poor

Over: NELSON CREEK

0.4 MI N OF SKANDIA, Marquette, MI

Built 1935 Load: 16.3 t ADT: 300

OLD COUNTY ROAD

Poor

Over: BLACK RIVER

SEC 13 BESSEMER TWP, Gogebic, MI

Built 1922 Load: 16.4 t ADT: 391

BUCK LAKE ROAD

Poor

Over: MIDDLE BR ONTONAGON RIV

SEC 13 WATERSMEET TWP, Gogebic, MI

Built 1957 Load: 16.4 t ADT: 28

ALAMANDO ROAD

Poor

Over: SALT RIVER

75 FT S OF STEWART ROAD, Midland, MI

Built 1906 Load: 16.4 t ADT: 73

AMSDEN ROAD

Poor

Over: DICKERSON CREEK

0.75 SOUTH OF FENWICK RD, Montcalm, MI

Built 1905 Load: 16.4 t ADT: 37

BISMARK HWY

Poor

Over: SEBEWA CREEK

4 MI S OF SUNFIELD, Eaton, MI

Built 1921 Load: 16.5 t ADT: 72

ELMS ROAD

Poor

Over: BRENT RUN

BET WILSON & VIENNA RD, Genesee, MI

Built 1929 Load: 16.5 t ADT: 3,741

SHELLENBARGER ROAD

Poor

Over: SMITH CREEK

0.1 MI W TOWERLINE ROAD, Iosco, MI

Built 1950 Load: 16.5 t ADT: 220

LANGE ROAD

Poor

Over: MIDDLE BR RED CEDAR RIV

SEC 11 IOSCO TWP, Livingston, MI

Built 1922 Load: 16.5 t ADT: 200

WASHINGTON RD

Poor

Over: SALT RIVER

0.1 MILE WEST OF BAKER RD, Macomb, MI

Built 1965 Load: 16.5 t ADT: 16,400

LIFE GUARD ROAD

Poor

Over: SADONY BAYOU

0.1 MI W OF LAU RD, Muskegon, MI

Built 1900 Load: 16.5 t ADT: 440

HAYES ST

Poor

Over: BRANCH OF SAND CREEK

MARNE - 0.3 MI E OF 16TH, Ottawa, MI

Built 1923 Load: 16.5 t ADT: 3,060

JEFFERSON AVENUE

Poor

Over: HURON RIVER

BROWNSTOWN COUNTY LINE, Wayne, MI

Built 1930 Load: 16.5 t ADT: 4,529

YOUNG DRIVE

Poor

Over: W GIBRALTAR WATERWAY

EAST OF WORTH, Wayne, MI

Built 1990 Load: 16.5 t ADT: 380

CASS CITY ROAD

Poor

Over: SOUTHGATE DRAIN

SEC 19-30 AKRON TWP, Tuscola, MI

Built 1945 Load: 16.7 t ADT: 77

107TH AVE

Poor

Over: SWAN CREEK

JUST W OF 46TH ST, Allegan, MI

Built 1974 Load: 16.8 t ADT: 55

21ST STREET

Poor

Over: LITTLE RABBIT RIVER

APPROX 1/8MI N OF 144TH A, Allegan, MI

Built 1973 Load: 16.8 t ADT: 168

20TH STREET

Poor

Over: RED RUN DRAIN

APPROX 5/8MI N OF 142ND A, Allegan, MI

Built 1972 Load: 16.8 t ADT: 245

Showing 10,351-10,400 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.