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

34 MILE ROAD

Fair

Over: LITTLE CEDAR RIVER

4 MI. W OF NADEAU, Menominee, MI

Built 1936 Load: 27.9 t ADT: 20

26TH STREET

Fair

Over: MENOMINEE RIVER

IN MENOMINEE CITY, Menominee, MI

Built 1976 Load: 27.9 t ADT: 8,450

US-24

Fair

Over: RAISIN RIVER & ELM AVE

IN MONROE, Monroe, MI

Built 1988 Load: 27.9 t ADT: 27,951

PONTALUNA

Fair

Over: US-31

1.0 MI N OF OTTAWA COL, Muskegon, MI

Built 1958 Load: 27.9 t ADT: 10,850

MARLETTE RD

Fair

Over: I-75

1.5 MI N OF CRAWFORD COL, Otsego, MI

Built 1961 Load: 27.9 t ADT: 800

HIGGINS LAKE PARK

Fair

Over: US-127 SB

7.0 MI N OF M-55, Roscommon, MI

Built 1967 Load: 27.9 t ADT: 1,750

HIGGINS LAKE PARK

Fair

Over: US-127 NB

7.0 MI N OF M-55, Roscommon, MI

Built 1967 Load: 27.9 t ADT: 1,750

JANES RD

Fair

Over: I-675 RAMP

@ I-75, Saginaw, MI

Built 1971 Load: 27.9 t ADT: 1,409

RIVERVIEW DRIVE

Fair

Over: I-75

9.7 MI NW OF GENESEE COL, Saginaw, MI

Built 1961 Load: 27.9 t ADT: 289

FOSTORIA ROAD

Fair

Over: FOSTORIA I/C DRAIN

SEC 35-36 WATERTOWN TWP, Tuscola, MI

Built 1987 Load: 27.9 t ADT: 2,080

ACKERMAN ROAD

Fair

Over: STATE I/C DRAIN EXTN

SEC 11-14 COLUMBIA TWP, Tuscola, MI

Built 1972 Load: 27.9 t ADT: 30

62 ND STREET

Fair

Over: I-94

4.0 MI E OF BERRIEN COL, Van Buren, MI

Built 1960 Load: 27.9 t ADT: 720

POWER PLANT RD

Fair

Over: N BR PAW PAW RIVER

IN PAW PAW, Van Buren, MI

Built 1988 Load: 27.9 t ADT: 2,075

I-94 WB

Fair

Over: MIDDLEBELT RD

1.2 MI W OF TAYLOR, Wayne, MI

Built 1993 Load: 27.9 t ADT: 74,175

NO 11.5 ROAD

Fair

Over: POPLAR CREEK

SECTION 36 T21N R12W, Wexford, MI

Built 1971 Load: 27.9 t ADT: 300

WHALEY ROAD

Fair

Over: US-131

CLAM LAKE TWP SEC 10, Wexford, MI

Built 1998 Load: 27.9 t ADT: 1,200

ADDISON ROAD

Fair

Over: KEMPTON DRAIN

0.25 MI W OF MERIDIAN RD, Hillsdale, MI

Built 1985 Load: 28.0 t ADT: 592

CHIPPEWA ROAD

Fair

Over: ONION CREEK

SEC 25-26 CHIPPEWA TWP, Isabella, MI

Built 1980 Load: 28.0 t ADT: 185

COLEMAN ROAD

Fair

Over: NORTH BR CHIPPEWA RIVER

VERNON TWP SEC 19/30, Isabella, MI

Built 1978 Load: 28.0 t ADT: 285

REDSTONE ROAD

Fair

Over: LITTLE SALT RIVER

JASPER TWP SEC 29/32, Midland, MI

Built 1970 Load: 28.0 t ADT: 1,089

NINE MILE ROAD

Fair

Over: N BR KAWKAWLIN RIVER

0.2 MI N OF PARISH RD, Bay, MI

Built 1980 Load: 28.1 t ADT: 350

SCOTT HWY

Fair

Over: BLACK CREEK

0.1 MI N OF SHELDON RD, Lenawee, MI

Built 1998 Load: 28.1 t ADT: 98

JUDD ROAD (EAST)

Fair

Over: PAINT CREEK

AUGUSTA TWP SEC 10 & 15 W, Washtenaw, MI

Built 1984 Load: 28.1 t ADT: 163

JUDD ROAD (WEST)

Fair

Over: PAINT CREEK

AUGUSTA TWP SEC 10 & 15 E, Washtenaw, MI

Built 1984 Load: 28.1 t ADT: 142

M-96 (E COLUMBIA)

Fair

Over: KALAMAZOO RIVER

0.4 MI E OF I-194, Calhoun, MI

Built 1994 Load: 28.2 t ADT: 17,000

M-51

Fair

Over: POKAGON CREEK

IN POKAGON, Cass, MI

Built 1931 Load: 28.2 t ADT: 5,100

HENRY STREET

Fair

Over: DOWAGIAC CREEK

0.2 MI SOUTH OF HIGH ST, Cass, MI

Built 1980 Load: 28.2 t ADT: 639

STRIMBACK ROAD

Fair

Over: MUD CREEK

1.5 MI S OF WOODBURY, Eaton, MI

Built 1992 Load: 28.2 t ADT: 58

I-75 NB & US-23 NB

Fair

Over: PINE RUN CREEK

0.4 MI N OF M-57, Genesee, MI

Built 1958 Load: 28.2 t ADT: 28,043

DUFFIELD RD

Fair

Over: I-69

1.0 MI E OF M-13, Genesee, MI

Built 1959 Load: 28.2 t ADT: 1,222

FRANCES ROAD

Fair

Over: BRENT RUN

BET JENNINGS & CLIO ROAD, Genesee, MI

Built 1925 Load: 28.2 t ADT: 364

WOODWORTH AVENUE

Fair

Over: PINE RIVER

0.2 MI S US-27BR IN ALMA, Gratiot, MI

Built 1979 Load: 28.2 t ADT: 2,991

MOELLER ROAD

Fair

Over: WILLOW RIVER

SEC 28-33 HURON TWP., Huron, MI

Built 1987 Load: 28.2 t ADT: 80

JEFFERSON STREET

Fair

Over: SYCAMORE CREEK

IN THE CITY OF MASON, Ingham, MI

Built 1975 Load: 28.2 t ADT: 5,795

M-21

Fair

Over: STONEY CREEK

1.5 MI E OF MUIR, Ionia, MI

Built 1929 Load: 28.2 t ADT: 2,533

LEATON RD

Fair

Over: US-10

2.2 MI SE OF CLARE COL, Isabella, MI

Built 1961 Load: 28.2 t ADT: 110

WILLITS ROAD

Fair

Over: FOSTORIA DRAIN

SEC. 31 RICH TWP., Lapeer, MI

Built 1965 Load: 28.2 t ADT: 95

GRAND RIVER AVE

Fair

Over: US-23 NB

0.5 MI S OF I-96, Livingston, MI

Built 1962 Load: 28.2 t ADT: 3,300

FLINT RD

Fair

Over: I-96

1.4 MI NW OF US-23, Livingston, MI

Built 1962 Load: 28.2 t ADT: 400

BAE ROAD

Fair

Over: CHOCOLAY RIVER

4.5 MILES N OF SKANDIA, Marquette, MI

Built 1910 Load: 28.2 t ADT: 400

TH (BECKMAN ROAD)

Fair

Over: NELSON CREEK

1 MI NW OF SKANDIA, Marquette, MI

Built 1930 Load: 28.2 t ADT: 40

13 MILE RD FH28

Fair

Over: BIG S BR PERE MARQUETTE

5 MI W OF BITELY, Newaygo, MI

Built 1958 Load: 28.2 t ADT: 350

17 MILE RD

Fair

Over: LSBR PERE MARQUETTE

6 MI NE OF BITELY, Newaygo, MI

Built 2000 Load: 28.2 t ADT: 100

I-96 EB

Fair

Over: 4 MI RD

0.8 MI NW OF KENT CO LINE, Ottawa, MI

Built 1961 Load: 28.2 t ADT: 19,024

I-96 WB

Fair

Over: 4 MI RD

0.8 MI NW OF KENT CO LINE, Ottawa, MI

Built 1961 Load: 28.2 t ADT: 19,024

QUINCY STREET

Fair

Over: BLACK CREEK

SECTION 11 HOLLAND TWP, Ottawa, MI

Built 1968 Load: 28.2 t ADT: 7,464

84TH AVE

Fair

Over: BLACK RIVER

SECTION 29 ZEELAND TWP, Ottawa, MI

Built 1976 Load: 28.2 t ADT: 100

MEADS LANDING RD

Fair

Over: US-127 SB

4.7 MI N OF M-55, Roscommon, MI

Built 1967 Load: 28.2 t ADT: 60

MEADS LANDING RD

Fair

Over: US-127 NB

4.7 MI N OF M-55, Roscommon, MI

Built 1967 Load: 28.2 t ADT: 60

BEYER ROAD

Fair

Over: CHEBOYGANING CREEK

1.0 MI N OF M-81, Saginaw, MI

Built 1960 Load: 28.2 t ADT: 248

Showing 751-800 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.