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

NEPESSING STREET

Good

Over: FLINT RIVER

3265 FT EAST OF M24 JUNCT, Lapeer, MI

Built 1973 Load: 41.8 t ADT: 5,850

PATTERSON LAKE RD

Good

Over: PORTAGE CREEK

SEC 32 PUTNAM TWP, Livingston, MI

Built 1998 Load: 41.8 t ADT: 1,614

M-59 WB

Good

Over: N BR CLINTON RIVER

0.7 MI W OF M-97, Macomb, MI

Built 1996 Load: 41.8 t ADT: 31,800

WEBER ROAD

Good

Over: BELLE RIVER

1.3 MILES EAST OF M-19, Macomb, MI

Built 2002 Load: 41.8 t ADT: 270

US-41

Good

Over: C&NW & E&LS RR

IN MENOMINEE, Menominee, MI

Built 1998 Load: 41.8 t ADT: 20,760

US-10 EB

Good

Over: SANFORD LAKE

0.2 MI NW OF M-30, Midland, MI

Built 2008 Load: 41.8 t ADT: 7,893

220 TH AVE

Good

Over: EAST BRANCH PINE RIVER

SECTION 28/29 T20N R10W, Osceola, MI

Built 2008 Load: 41.8 t ADT: 62

M-45

Good

Over: SAND CREEK

2.7 MI W OF KENT CO LINE, Ottawa, MI

Built 1999 Load: 41.8 t ADT: 18,856

I-75 NB

Good

Over: GENESEE AVE

10.5 MI NW OF GENESEE CO, Saginaw, MI

Built 1961 Load: 41.8 t ADT: 25,971

MARLETTE ROAD

Good

Over: ELK CREEK DRAIN

SEC 33 WATERTOWN TWP, Sanilac, MI

Built 1983 Load: 41.8 t ADT: 725

MONROE RD

Good

Over: THREE MILE CREEK

0.5 MI N 1 MI E OF DURAND, Shiawassee, MI

Built 1986 Load: 41.8 t ADT: 363

MEISNER ROAD

Good

Over: BELLE RIVER

PC 243 EAST CHINA TWP., St. Clair, MI

Built 2020 Load: 41.8 t ADT: 3,275

SMITHS CREEK ROAD

Good

Over: PINE RIVER

SEC. 27-34 KIMBALL TWP., St. Clair, MI

Built 1973 Load: 41.8 t ADT: 3,160

DEXTER-PINCKNEY RD

Good

Over: PORTAGE LAKE CANAL

DEXTER TWP SECTION 2, Washtenaw, MI

Built 2010 Load: 41.8 t ADT: 7,407

M-102 RAMP

Good

Over: M-10 RAMP

N LTS OF DETROIT, Wayne, MI

Built 1965 Load: 41.8 t ADT: 6,000

M-5 EB

Good

Over: ROUGE RIVER

IN DETROIT, Wayne, MI

Built 2003 Load: 41.8 t ADT: 9,098

PLYMOUTH ROAD

Good

Over: M-39 (SOUTHFIELD)

IN DETROIT, Wayne, MI

Built 1961 Load: 41.8 t ADT: 34,400

DAVISON TO I-75 RP

Good

Over: GTWRR I-75&DAVISON(M-8)

IN DETROIT, Wayne, MI

Built 1971 Load: 41.8 t ADT: 5,930

EAST RIVER ROAD

Good

Over: N HICKORY CANAL

GROSSE ILE T S/GROH, Wayne, MI

Built 2020 Load: 41.8 t ADT: 1,225

18TH AVE

Good

Over: RUSH CREEK

SECTION 22 GEORGETOWN TWP, Ottawa, MI

Built 1996 Load: 41.8 t ADT: 7,948

SKEELS ROAD

Good

Over: FLOWER CREEK

0.25 MI W OF 72ND AVE, Oceana, MI

Built 2001 Load: 41.8 t ADT: 150

I-94 WB

Good

Over: GRISWOLD ROAD

PORT HURON TWP SEC 7-18, St. Clair, MI

Built 2003 Load: 41.8 t ADT: 14,887

US-131

Good

Over: ST JOSEPH RIVER

W LIMITS OF CONSTANTINE, St. Joseph, MI

Built 2013 Load: 41.8 t ADT: 9,999

TUTTLE ROAD

Good

Over: E BR ST JOSEPH OF MAUMEE

0.3 MI S OF BURT ROAD, Hillsdale, MI

Built 1987 Load: 41.9 t ADT: 36

CONDENSERY ROAD

Good

Over: UNNAMED STREAM

0.40 MI E OF HERRICK ROAD, Montcalm, MI

Built 2002 Load: 41.9 t ADT: 75

COWLING ROAD

Good

Over: ROCKY RIVER

1 MI N OF THREE RIVERS, St. Joseph, MI

Built 1993 Load: 41.9 t ADT: 146

CANANDAIGUA RD

Good

Over: BEAR CREEK

0.25 MI EAST OF M-156, Lenawee, MI

Built 2006 Load: 42.0 t ADT: 190

BUCHOLTZ HWY

Good

Over: SCHENK BEN KELLY DRAIN

0.1 MI S OF SUTTON RD, Lenawee, MI

Built 2003 Load: 42.0 t ADT: 49

US-23

Good

Over: WHITNEY DRAIN

1.0 MI S OF IOSCO CO LINE, Arenac, MI

Built 1972 Load: 42.1 t ADT: 7,600

SILVER RIVER ROAD

Good

Over: SILVER RIVER

5 MI SE OF LANSE, Baraga, MI

Built 2005 Load: 42.1 t ADT: 68

WHEELER RD

Good

Over: M-13/I-75 CONN

1.0 MI S OF KAWKAWLIN, Bay, MI

Built 1961 Load: 42.1 t ADT: 2,966

GRANGE ROAD

Good

Over: LOOKING GLASS RIVER

1/2 S OF HERBISON, Clinton, MI

Built 2008 Load: 42.1 t ADT: 2,311

M-30

Good

Over: LARABEE CREEK

IN WINEGARS, Gladwin, MI

Built 1977 Load: 42.1 t ADT: 3,517

ROSEBUSH ROAD

Good

Over: NORTH BR SALT RIVER

0.5M E NWCOR SEC15 DENV, Isabella, MI

Built 2017 Load: 42.1 t ADT: 885

THIRTY-FIFTH ST

Good

Over: KALAMAZOO RIVER

W GALESBURG LIMITS, Kalamazoo, MI

Built 2008 Load: 42.1 t ADT: 14,452

M-22

Good

Over: CEDAR CREEK

1.5 MI N OF GRND TRAV COL, Leelanau, MI

Built 2006 Load: 42.1 t ADT: 9,527

M-34

Good

Over: BEAN CREEK

IN HUDSON, Lenawee, MI

Built 1998 Load: 42.1 t ADT: 6,285

SMITH ROAD

Good

Over: RED CEDAR RIVER

SEC 13-14 HANDY TWP, Livingston, MI

Built 1999 Load: 42.1 t ADT: 160

HILL ISLAND ROAD

Good

Over: FLOWER BAY LAKE HURON

0.25 MI S OF M-134, Mackinac, MI

Built 2018 Load: 42.1 t ADT: 606

28 MILE ROAD

Good

Over: SALT RIVER

0.4 MI WEST OF GRATIOT, Macomb, MI

Built 2003 Load: 42.1 t ADT: 130

O-3 ROAD

Good

Over: LITTLE CEDAR RIVER

0.5 MI. NW OF DAGGETT, Menominee, MI

Built 2010 Load: 42.1 t ADT: 20

F-1 ROAD

Good

Over: TEN MILE CREEK

3 MI. NW OF WHITNEY, Menominee, MI

Built 2015 Load: 42.1 t ADT: 100

CALL ROAD

Good

Over: CLAM RIVER

SECTION 5/6 T21N R7W, Missaukee, MI

Built 1986 Load: 42.1 t ADT: 180

HEAD-O-LAKE RD

Good

Over: OTTAWA LAKE OUTLET

1.6 MI NO OF OLD US 223, Monroe, MI

Built 2002 Load: 42.1 t ADT: 570

SECOR RD

Good

Over: LOCKWOOD DRAIN

2.4 MI N OF CO RD 151, Monroe, MI

Built 2013 Load: 42.1 t ADT: 1,340

HESS LAKE DRIVE

Good

Over: WHEELER DRAIN

S SIDE HESS LAKE, Newaygo, MI

Built 2006 Load: 42.1 t ADT: 1,000

120TH AVENUE

Good

Over: PIGEON CREEK

0.49 MILES N OF TAYLOR, Ottawa, MI

Built 1997 Load: 42.1 t ADT: 8,390

DICE ROAD

Good

Over: JO DRAIN (SWAN CREEK)

1.1 MI E OF GLEANER ROAD, Saginaw, MI

Built 1995 Load: 42.1 t ADT: 703

M-90

Good

Over: SPRING CREEK

0.7 MI E OF M-19, Sanilac, MI

Built 2000 Load: 42.1 t ADT: 5,001

BANNER ROAD

Good

Over: ELK CREEK DRAIN

SEC 33-34 WATERTOWN TWP, Sanilac, MI

Built 1983 Load: 42.1 t ADT: 222

Showing 8,101-8,150 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.