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

GRISWOLD ROAD

Poor

Over: PINE RIVER

SEC. 7-18 KIMBALL TWP., St. Clair, MI

Built 1990 Load: 19.8 t ADT: 2,030

FARRAND ROAD

Poor

Over: ST JOSEPH RIVER

1.0 MI NW OF COLON, St. Joseph, MI

Built 1965 Load: 19.8 t ADT: 1,482

CHESTNUT

Poor

Over: CLAM RIVER

IN CADILLAC, Wexford, MI

Built 1968 Load: 19.8 t ADT: 12,000

SENECA HWY

Poor

Over: RAISIN RIVER S BRANCH

0.2 MI S OF M-34, Lenawee, MI

Built 1978 Load: 19.8 t ADT: 340

STONE ROAD

Poor

Over: MAPLE RIVER DRAIN

1/4 MI E OF WRIGHT RD, Clinton, MI

Built 1938 Load: 19.9 t ADT: 505

MORSEVILLE RD

Poor

Over: PINE RUN CREEK

0.2 MI N OF BIRCH RUN RD, Saginaw, MI

Built 1957 Load: 19.9 t ADT: 405

ROUTE 410

Poor

Over: TEN MILE CREEK

11 MI W OF ESCANABA, Delta, MI

Built 1939 Load: 20.1 t ADT: 444

PEACH LAKE RD

Poor

Over: W BR RIFLE RIVER

2 MI SOUTH OF M-55, Ogemaw, MI

Built 1948 Load: 20.1 t ADT: 643

SHIPMAN RD

Poor

Over: RUSHBED CREEK

1.3 MI S OF JUDDVILLE, Shiawassee, MI

Built 1930 Load: 20.1 t ADT: 144

FAWN RIVER ROAD

Poor

Over: FAWN RIVER

0.7 MI WEST OF FAWN RIVER, St. Joseph, MI

Built 1964 Load: 20.1 t ADT: 1,441

BALL CREEK RD

Poor

Over: BALL CREEK

0.30 MI NW OF 17 MILE RD, Kent, MI

Built 1925 Load: 20.2 t ADT: 2,100

BALL CREEK RD

Poor

Over: BALL CREEK

0.14 MI SE OF MAIN ST, Kent, MI

Built 1925 Load: 20.2 t ADT: 2,100

62ND STREET

Poor

Over: LEVERIDGE DRAIN

APPROX 1/8MI S OF 116TH A, Allegan, MI

Built 1972 Load: 20.4 t ADT: 754

HAVEN ROAD

Poor

Over: S BRA KALAMAZOO RIVER

ONE BLOCK EAST OF M-99 &, Calhoun, MI

Built 1979 Load: 20.4 t ADT: 839

JORDAN ROAD

Poor

Over: KEARSLEY CREEK

2600 FT EAST OF IRISH RD, Genesee, MI

Built 1934 Load: 20.4 t ADT: 315

COOK ROAD

Poor

Over: SWARTZ CREEK

0.1 MI. WEST OF FENTON RD, Genesee, MI

Built 1930 Load: 20.4 t ADT: 542

AIRLINE ROAD

Poor

Over: SOUTH BR CHIPPEWA RIVER

0.45M W NE COR SEC 17 T15, Isabella, MI

Built 1974 Load: 20.4 t ADT: 788

E N HINES DRIVE

Poor

Over: MIDDLE ROUGE RIVER

WESTLAND W/MERRIMAN, Wayne, MI

Built 1948 Load: 20.4 t ADT: 14,193

ROOSEVELT ROAD

Poor

Over: HICKORY CREEK

1 MI NE OF STEVENSVILLE, Berrien, MI

Built 1970 Load: 20.7 t ADT: 2,045

QUINCY GRANGE ROAD

Poor

Over: SOUTH BR HOG CREEK

BUTLER TWP SEC 20-21, Branch, MI

Built 1983 Load: 20.7 t ADT: 210

LINDEN ROAD

Poor

Over: BRENT RUN

2500 FT SOUTH OF WILSON, Genesee, MI

Built 1931 Load: 20.7 t ADT: 4,149

OLD US-2

Poor

Over: TENDERFOOT CREEK

SEC 31 MARENISCO TWP, Gogebic, MI

Built 1927 Load: 20.7 t ADT: 7

KUHL ROAD

Poor

Over: SHEBEON DRAIN

SEC. 14-15 FAIRHAVEN TWP., Huron, MI

Built 1984 Load: 20.7 t ADT: 350

MCMILLAN ROAD

Poor

Over: MOORE CREEK

SEC 33-34 HUME TWP, Huron, MI

Built 1920 Load: 20.7 t ADT: 180

CHAPIN ROAD

Poor

Over: LAMB CREEK

0.1 MI N OF RIDGE ROAD, Saginaw, MI

Built 1916 Load: 20.7 t ADT: 675

STONY CREEK ROAD

Poor

Over: PAINT CREEK

YPSILANTI TWP SEC 20 & 21, Washtenaw, MI

Built 1920 Load: 20.7 t ADT: 8,856

NO 1 ROAD

Poor

Over: SLAGLE CREEK

SECTION 6 T22N R12W, Wexford, MI

Built 1975 Load: 20.7 t ADT: 25

OLD DIXBORO ROAD

Poor

Over: HURON RIVER

ANN ARBOR TWP SEC 36, Washtenaw, MI

Built 1921 Load: 20.8 t ADT: 16,342

DIVINE HIGHWAY

Poor

Over: LOOKINGGLASS RIVER

0.05 MI N OF OLD US16 POR, Ionia, MI

Built 1979 Load: 20.9 t ADT: 2,494

KING ROAD

Poor

Over: BETSIE RIVER

1.5 MI N OF THOMPSONVILLE, Benzie, MI

Built 1973 Load: 21.1 t ADT: 52

MILLBROOK ROAD

Poor

Over: PONY CREEK

0.4 M W SE COR SEC 35 T14, Isabella, MI

Built 1939 Load: 21.1 t ADT: 56

44TH STREET

Poor

Over: BUCK CREEK

IN WYOMING, Kent, MI

Built 1976 Load: 21.1 t ADT: 27,397

WILSON ROAD

Poor

Over: S BR PERE MARQUETTE RIVR

2.5 MI S 2 MI E OF CUSTER, Mason, MI

Built 1900 Load: 21.1 t ADT: 100

RIVERSIDE PARK DR

Poor

Over: GRAND RIVER LAGOON

RIVERSIDE PARK, Kent, MI

Built 1930 Load: 21.3 t ADT: 200

114TH AVE

Poor

Over: MINER CREEK DRAIN

JUST W OF 21ST ST, Allegan, MI

Built 1974 Load: 21.4 t ADT: 300

19 1/2 MILE ROAD

Poor

Over: STATE DITCH

7 MI N OF MARSHALL, Calhoun, MI

Built 1974 Load: 21.4 t ADT: 147

HOLT ROAD

Poor

Over: DOAN CREEK

4.6 MILES SE OF WILLIAMST, Ingham, MI

Built 1957 Load: 21.4 t ADT: 1,050

DUNHAM ROAD

Poor

Over: MILLER DRAIN

0.1 MI W OF HEYDENREICH, Macomb, MI

Built 1964 Load: 21.4 t ADT: 2,740

BLOCK ROAD

Poor

Over: CHEBOYGANING CREEK

1.0 MI N OF HOLLAND ROAD, Saginaw, MI

Built 1960 Load: 21.4 t ADT: 433

40TH STREET

Poor

Over: PAW PAW RIVER

2.7 MI SE OF GLENDALE, Van Buren, MI

Built 1970 Load: 21.4 t ADT: 780

BECK ROAD

Poor

Over: JOHNSON DRAIN

NORTHVILLE T N/SIX MILE, Wayne, MI

Built 1930 Load: 21.4 t ADT: 16,972

BLACK RIVER FALLS

Poor

Over: BLACK RIVER

1.3 MI W OF CR 581, Marquette, MI

Built 1930 Load: 21.5 t ADT: 10

DORWOOD ROAD

Poor

Over: BIRCH RUN CREEK

0.5 MI N OF BUSCH ROAD, Saginaw, MI

Built 1973 Load: 21.6 t ADT: 467

MAIN ST-WHITMORE

Poor

Over: HORSESHOE LAKE OUTLET

NORTHFIELD TWP SEC 5, Washtenaw, MI

Built 1920 Load: 21.6 t ADT: 5,803

CAYUGA STREET

Poor

Over: INTERMEDIATE RIVER

0.2 MI W OF M-88, Antrim, MI

Built 1977 Load: 21.7 t ADT: 3,000

ORCHARD BEACH ROAD

Poor

Over: BLACK RIVER

BETWEEN SEC 26&35 T37NR1W, Cheboygan, MI

Built 1976 Load: 21.7 t ADT: 2,200

COUNTY HWY 569

Poor

Over: E BR STURGEON RIVER

FOSTER CITY, Dickinson, MI

Built 1945 Load: 21.7 t ADT: 453

DERBY ST

Poor

Over: GRAND TRUNK WESTERN RR

0.9 MI W OF COOLIDGE HWY, Oakland, MI

Built 1930 Load: 21.7 t ADT: 1,952

WILKES ROAD

Poor

Over: MILL CREEK

SEC.23-26 BROCKWAY TWP., St. Clair, MI

Built 1980 Load: 21.7 t ADT: 120

140TH AVE

Poor

Over: RED RUN DRAIN

APPROX 1/8MI W OF 16TH ST, Allegan, MI

Built 1974 Load: 22.0 t ADT: 279

Showing 10,501-10,550 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.