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

MANSFIELD RD

Fair

Over: MICHIGAMME RIVER

3.5 MI NW COLONY CORNERS, Iron, MI

Built 2006 Load: 34.0 t ADT: 179

B AVE

Fair

Over: US-131

1.0 MI S OF ALLEGAN COL, Kalamazoo, MI

Built 1962 Load: 34.0 t ADT: 736

M-89

Fair

Over: GULL CREEK

0.1 MI W OF 37 TH STREET, Kalamazoo, MI

Built 1949 Load: 34.0 t ADT: 5,044

WHITNEYVILLE AVE

Fair

Over: I-96

4.7 MI E OF M-11, Kent, MI

Built 1959 Load: 34.0 t ADT: 5,700

MORSE LAKE AVE

Fair

Over: I-96

1.9 MI W OF M-50 & M-91, Kent, MI

Built 1959 Load: 34.0 t ADT: 615

DEAN LAKE AVE

Fair

Over: I-96

2.8 MI E & S OF US-131, Kent, MI

Built 1961 Load: 34.0 t ADT: 8,696

INDIAN LAKES RD

Fair

Over: CEDAR CREEK

0.50 MI E OF ALGOMA RD, Kent, MI

Built 1962 Load: 34.0 t ADT: 741

I-69 WB

Fair

Over: S BR FLINT RIVER

SE OF LAPEER, Lapeer, MI

Built 1983 Load: 34.0 t ADT: 12,398

ELM CREEK ROAD

Fair

Over: ELM CREEK DRAIN

SEC. 2-11 N. BRANCH TWP., Lapeer, MI

Built 1979 Load: 34.0 t ADT: 58

FOX STREET

Fair

Over: FARMERS CREEK

350 FT NORTH OF M21 JUNCT, Lapeer, MI

Built 1983 Load: 34.0 t ADT: 737

US-223

Fair

Over: S BR RAISIN RIVER

0.5 MI S OF ADRIAN, Lenawee, MI

Built 1953 Load: 34.0 t ADT: 13,253

SAND CREEK HWY

Fair

Over: NILE DRAIN

0.2 MI S OF MULBERRY RD, Lenawee, MI

Built 1969 Load: 34.0 t ADT: 180

FISK ROAD

Fair

Over: UNNAMED CREEK

SEC 1 MARION TWP, Livingston, MI

Built 1943 Load: 34.0 t ADT: 547

UTICA RD

Fair

Over: M-59

IN UTICA, Macomb, MI

Built 1994 Load: 34.0 t ADT: 8,500

MARTIN RD

Fair

Over: I-94

W LTS OF ST CLAIR SHORES, Macomb, MI

Built 1967 Load: 34.0 t ADT: 2,270

M-3 TO I-94 EB CON

Fair

Over: I-94 WB

IN ROSEVILLE (NB GRATIOT), Macomb, MI

Built 1965 Load: 34.0 t ADT: 17,021

26 MILE ROAD

Fair

Over: YATES DRAIN

0.2 MI EAST OF M-53, Macomb, MI

Built 1972 Load: 34.0 t ADT: 22,405

GORDONVILLE ROAD

Fair

Over: LITTLE SALT CREEK

0.4 MI W OF TEN MILE RD, Midland, MI

Built 1986 Load: 34.0 t ADT: 244

SIDNEY RD (CR 510)

Fair

Over: FLAT RIVER

0.25 MI. E. OF JOHNSON RD, Montcalm, MI

Built 1931 Load: 34.0 t ADT: 4,593

MCBRIDES RD 530

Fair

Over: PINE RIVER

0.03 WEST OF CO LINE, Montcalm, MI

Built 1967 Load: 34.0 t ADT: 316

CO ROAD 451

Fair

Over: N BR THUNDER BAY RIVER

SEC 1 MONTMORENCY TWP E, Montmorency, MI

Built 1994 Load: 34.0 t ADT: 2,126

US-31 NB

Fair

Over: BLACK CREEK

1.0 MI N OF I-96, Muskegon, MI

Built 1959 Load: 34.0 t ADT: 31,322

US-31 NB

Fair

Over: CSX RR

1.9 MI N OF M-120, Muskegon, MI

Built 1963 Load: 34.0 t ADT: 12,533

GILES ROAD

Fair

Over: BEAR CREEK

0.4 MI W OF M-120, Muskegon, MI

Built 1932 Load: 34.0 t ADT: 9,080

INDIAN BAY ROAD

Fair

Over: FLOWER CREEK

0.3 MI S OF COUNTY LINE, Muskegon, MI

Built 1920 Load: 34.0 t ADT: 278

MOORLAND ROAD

Fair

Over: CROCKERY CREEK

0.7 MI S OF MT GARFIED RD, Muskegon, MI

Built 1950 Load: 34.0 t ADT: 1,460

LAHSER RD

Fair

Over: M-10

IN SOUTHFIELD, Oakland, MI

Built 1963 Load: 34.0 t ADT: 57,800

I-696 WB SER

Fair

Over: M-1 (WOODWARD AVE)

AT I-696 & WOODWARD, Oakland, MI

Built 1986 Load: 34.0 t ADT: 93,000

I-696 EB SERV

Fair

Over: M-1 (WOODWARD AVE)

AT I-696 & WOODWARD, Oakland, MI

Built 1986 Load: 34.0 t ADT: 27,000

CENTRAL PARK BLVD

Fair

Over: I-696

IN SOUTHFIELD, Oakland, MI

Built 1986 Load: 34.0 t ADT: 1,500

NB BALDWIN RD

Fair

Over: I-75

3.1 MI NW OF M-24, Oakland, MI

Built 1993 Load: 34.0 t ADT: 13,188

RATTALEE LAKE RD

Fair

Over: I-75

4.8 MI NW OF M-10, Oakland, MI

Built 1963 Load: 34.0 t ADT: 1,420

120 TH AVENUE

Fair

Over: N BR PENTWATER RIVER

3 MI NW OF CRYSTAL VALLEY, Oceana, MI

Built 1953 Load: 34.0 t ADT: 1,000

LEVER RD

Fair

Over: S BRANCH PENTWATER RIVER

0.5 MI E OF 104TH AVE, Oceana, MI

Built 1979 Load: 34.0 t ADT: 100

STATE STREET

Fair

Over: HART LAKE-PENTWATER RIVE

IN HART 350 FT N OF MAIN, Oceana, MI

Built 1983 Load: 34.0 t ADT: 1,350

85TH AVE

Fair

Over: MUSKEGON RIVER

SECTION 3 T17N R8W, Osceola, MI

Built 1994 Load: 34.0 t ADT: 2,805

ROTH STREET

Fair

Over: HERSEY RIVER

IN REED CITY 0.3MI S.OF10, Osceola, MI

Built 1979 Load: 34.0 t ADT: 400

MILL ST (OLD US-27

Fair

Over: I-75

NW LTS OF VANDERBILT, Otsego, MI

Built 1962 Load: 34.0 t ADT: 850

96TH AVENUE

Fair

Over: BASS RIVER

0.98 MI N OF FILLMORE, Ottawa, MI

Built 1973 Load: 34.0 t ADT: 5,360

PORTER ROAD

Fair

Over: RAINY RIVER

ALLIS TWP SEC 11 & 12, Presque Isle, MI

Built 2008 Load: 34.0 t ADT: 650

COUNTY ROAD 402

Fair

Over: US-127 SB

2.8 MI N OF CLARE CO LINE, Roscommon, MI

Built 1967 Load: 34.0 t ADT: 100

M-57

Fair

Over: LAMB CREEK

4.3 MI E OF GRATIOT COL, Saginaw, MI

Built 1959 Load: 34.0 t ADT: 3,741

BISHOP ROAD

Fair

Over: FAIRCHILD CREEK

0.9 MI N OF GARY ROAD, Saginaw, MI

Built 1994 Load: 34.0 t ADT: 192

MERIDIAN ROAD

Fair

Over: BEAVER CREEK

0.9MINOFROOSEVELTRD, Saginaw, MI

Built 1994 Load: 34.0 t ADT: 156

EAST ROAD

Fair

Over: MISTEGUAY CREEK

0.6 MI N OF VOLKMER ROAD, Saginaw, MI

Built 1986 Load: 34.0 t ADT: 171

WASHINGTON ROAD

Fair

Over: ELK CREEK DRAIN

SEC 9-16 WASHINGTON TWP, Sanilac, MI

Built 1983 Load: 34.0 t ADT: 225

ST CLAIR HWY

Fair

Over: I-94

5.9 MI NE OF MACOMB COL, St. Clair, MI

Built 1964 Load: 34.0 t ADT: 2,130

MILLARD ROAD

Fair

Over: N BR MILL CREEK DRAIN

SEC 15 LYNN TWP, St. Clair, MI

Built 1964 Load: 34.0 t ADT: 22

RAVENSWOOD ROAD

Fair

Over: SMITHS CREEK

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

Built 1912 Load: 34.0 t ADT: 105

DEAN STREET

Fair

Over: PRAIRIE RIVER

0.1 MI N OF CENTREVILLE, St. Joseph, MI

Built 1967 Load: 34.0 t ADT: 1,314

Showing 2,001-2,050 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.