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

RIVER AVE

Good

Over: BLACK RIVER

NORTH LIMITS OF HOLLAND, Ottawa, MI

Built 2005 Load: 56.7 t ADT: 33,450

OLD US-27

Good

Over: WOLF CREEK

SECTION 15/16 T21N R4W, Roscommon, MI

Built 1935 Load: 56.7 t ADT: 1,276

M-46

Good

Over: WHITMORE DRAIN

2.3 MI EAST OF MERRILL, Saginaw, MI

Built 2018 Load: 56.7 t ADT: 6,100

I-94 WB

Good

Over: GTW RR

0.6 MI W OF M-21, St. Clair, MI

Built 2003 Load: 56.7 t ADT: 14,887

I-94

Good

Over: GREENFIELD RD

IN DEARBORN, Wayne, MI

Built 1971 Load: 56.7 t ADT: 98,506

HAGGERTY ROAD

Good

Over: SWAN CREEK

SUMPTER S/JUDD, Wayne, MI

Built 1998 Load: 56.7 t ADT: 159

I-94 & I-69 EB

Good

Over: BLACK RIVER & SCOTT AVE

W CITY LIMITS, St. Clair, MI

Built 2011 Load: 56.7 t ADT: 7,820

MID-BAY CO LINE RD

Good

Over: N BR KAWKAWLIN RIVER

1 MI N OF E LEVELY RD, Bay, MI

Built 2019 Load: 56.7 t ADT: 80

MAPLE POINT RD

Good

Over: MOLASSES RIVER

250 FT W OF FORNIER RD, Gladwin, MI

Built 2022 Load: 56.7 t ADT: 250

BREWER RD

Good

Over: SWAMP RAISIN CREEK

2.75 MI E OF COUNTY LINE, Monroe, MI

Built 2009 Load: 56.8 t ADT: 260

BEAL CITY ROAD

Good

Over: JORDAN CREEK

SEC 21-28 DENVER TWP, Isabella, MI

Built 2007 Load: 56.9 t ADT: 95

LABERDEE RD

Good

Over: RIVER RAISIN

0.5 MI W OF WILMOTH HWY, Lenawee, MI

Built 2008 Load: 56.9 t ADT: 1,382

HURON LINE ROAD

Good

Over: STATE DRAIN I/C DRAIN

SEC 35 SEBEWAING TWP, Huron, MI

Built 1925 Load: 57.0 t ADT: 44

TURTLE ROAD

Good

Over: EAST BRANCH AUGRES RIVER

600 FT W OF E SEC LINE, Iosco, MI

Built 2008 Load: 57.0 t ADT: 50

M-64

Good

Over: FLOODWOOD RIVER

4.0 MI SW OF US-45, Ontonagon, MI

Built 1968 Load: 57.0 t ADT: 1,725

RILEY ST

Good

Over: BLACK CREEK

SECTION 14 HOLLAND TWP, Ottawa, MI

Built 2011 Load: 57.0 t ADT: 13,450

ANCHOR BAY DRIVE

Good

Over: UNNAMED CANAL

SEC 25 CLAY TWP, St. Clair, MI

Built 1984 Load: 57.0 t ADT: 1,655

WILSON DRIVE

Good

Over: E FORK SAND CREEK

0.17 MI N OF 3 MILE ROAD, Kent, MI

Built 1996 Load: 57.0 t ADT: 800

E CR 638

Good

Over: GRAND LAKE OUTLET

0.75 MI E OF US-23, Presque Isle, MI

Built 2018 Load: 57.0 t ADT: 718

TERRITORIAL ROAD

Good

Over: E BR ST JOSEPH OF MAUMEE

0.2 MI E OF GILBERT RD, Hillsdale, MI

Built 2008 Load: 57.1 t ADT: 1,028

LYONS HWY

Good

Over: BLACK CREEK

0.4 MI S OF PACKARD RD, Lenawee, MI

Built 2009 Load: 57.1 t ADT: 1,117

TWO MILE ROAD

Good

Over: GOETZ DRAIN

1.0 MI S OF AMELITH RD, Bay, MI

Built 2016 Load: 57.3 t ADT: 156

ANDERSON ROAD

Good

Over: HAYWORTH CREEK

0.3 MI N OF PAXTON RD, Clinton, MI

Built 2011 Load: 57.3 t ADT: 94

M-25

Good

Over: MUD CREEK

3.8 MI NE OF BAY PORT, Huron, MI

Built 2006 Load: 57.3 t ADT: 3,104

HUBBARDSTON RD

Good

Over: MAPLE RIVER

3.5 MILES NORTH OF PEWAMO, Ionia, MI

Built 2000 Load: 57.3 t ADT: 1,170

DEERFIELD ROAD

Good

Over: POTTER CREEK

SEC 27-34 CHIPPEWA TWP, Isabella, MI

Built 1983 Load: 57.3 t ADT: 175

MILLS

Good

Over: KALAMAZOO

IN KALAMAZOO, Kalamazoo, MI

Built 1993 Load: 57.3 t ADT: 11,538

WILMOTH HWY

Good

Over: RIVER RAISIN

0.4 MI SOUTH OF E VALLEY, Lenawee, MI

Built 2017 Load: 57.3 t ADT: 1,503

COATES HWY FH38

Good

Over: BIG MANISTEE RIVER

8.5 MILES E OF BRETHERN, Manistee, MI

Built 2018 Load: 57.3 t ADT: 854

BRENNAN ROAD

Good

Over: BEAVER CREEK

0.2 MI N OF NELSON ROAD, Saginaw, MI

Built 1998 Load: 57.3 t ADT: 114

WALTZ ROAD

Good

Over: HURON RIVER

HURON T S/HURON RIVER DR, Wayne, MI

Built 2019 Load: 57.3 t ADT: 4,320

McCORMICK DR. EXT.

Good

Over: HUNTERS CREEK

CITY OF LAPEER, Lapeer, MI

Built 1998 Load: 57.3 t ADT: 7,343

SB I-75 RMP TO VER

Good

Over: I-75 AND WB I-96

AMBASSADOR GATEWAY, Wayne, MI

Built 2007 Load: 57.3 t ADT: 22,000

WEST RIVER ROAD

Good

Over: BLACK CREEK

JEROME TWP SEC 11, Midland, MI

Built 2016 Load: 57.3 t ADT: 350

M-140

Good

Over: PAW PAW LAKE OUTLET

1.7 MI N OF WATERVLIET, Berrien, MI

Built 1958 Load: 57.7 t ADT: 4,525

BROOKFIELD ROAD

Good

Over: BATTLE CREEK RIVER

2 MI E OF CHARLOTTE, Eaton, MI

Built 2015 Load: 57.7 t ADT: 368

STATE ROAD

Good

Over: BEEBE CREEK

0.1 MILE S OF MAUCK RD, Hillsdale, MI

Built 1982 Load: 57.7 t ADT: 1,396

BACH ROAD

Good

Over: BROOKFIELD I/C DRAIN

SEC 28-33 BROOKFIELD TWP, Huron, MI

Built 2008 Load: 57.7 t ADT: 160

DAVID HWY

Good

Over: LIBHART CREEK

2 MI S OF IONIA 4.6 MI E, Ionia, MI

Built 2016 Load: 57.7 t ADT: 1,550

DUMON ROAD

Good

Over: MILLE RACE

0.5 MILES EAST OF SYMRNA, Ionia, MI

Built 1999 Load: 57.7 t ADT: 102

CROCKETT HWY

Good

Over: BLACK CREEK

0.5 MI SOUTH OF GORMAN RD, Lenawee, MI

Built 2016 Load: 57.7 t ADT: 874

ARMADA CENTER RD

Good

Over: N. BRANCH CLINTON RIVER

0.2 MI WEST OF MCFADDEN, Macomb, MI

Built 1995 Load: 57.7 t ADT: 1,680

WOLCOTT ROAD

Good

Over: N BRANCH CLINTON RIVER

0.4 MI NORTH OF 29 MILE, Macomb, MI

Built 2014 Load: 57.7 t ADT: 860

HIGH BRIDGE R FH31

Good

Over: BIG MANISTEE RIVER

3.0 MILES S OF BRETHERN, Manistee, MI

Built 1993 Load: 57.7 t ADT: 2,015

WILCOX ROAD

Good

Over: MID. BRANCH MACON DRAIN

0.2 MI N OF KENT ROAD, Monroe, MI

Built 1976 Load: 57.7 t ADT: 210

LUCE ST

Good

Over: SAND CREEK

SECTION 35 TALLMADGE TWP, Ottawa, MI

Built 2015 Load: 57.7 t ADT: 1,300

FRANKFORD ROAD

Good

Over: SUCKER CREEK

SEC 7 WELLS TWP, Tuscola, MI

Built 2016 Load: 57.7 t ADT: 540

LONYO AVE

Good

Over: I-94

IN DETROIT, Wayne, MI

Built 1949 Load: 57.7 t ADT: 13,370

M-231

Good

Over: GRAND RIVER

4.5 MI N OF M-45, Ottawa, MI

Built 2013 Load: 57.7 t ADT: 18,700

PROSPECT STREET

Good

Over: BUTTERMILK CREEK

500 FT W OF 32ND AVENUE, Ottawa, MI

Built 1970 Load: 57.7 t ADT: 500

Showing 9,401-9,450 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.