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

SHEARER RD

Good

Over: HOWLAND CREEK

120 RODS S OF M-61, Gladwin, MI

Built 1985 Load: 19.6 t ADT: 286

SCHMIDT RD

Good

Over: N BR CEDAR RIVER

30 RODS W OF BARD RD, Gladwin, MI

Built 1992 Load: 19.6 t ADT: 205

YOUNGS RD

Good

Over: LITTLE TOBACCO RIVER

1 MI WEST OF M30, Gladwin, MI

Built 2002 Load: 19.6 t ADT: 250

NICKLESS RD

Good

Over: S BR LITTLE SUGAR RIVER

140 RODS S OF REIGLE RD, Gladwin, MI

Built 2003 Load: 19.6 t ADT: 300

NETTLETON RD

Good

Over: LITTLE TOBACCO RIVER

155 RODS N OF YOUNGS RD, Gladwin, MI

Built 1994 Load: 19.6 t ADT: 80

GRASS LAKE RD

Good

Over: TITTABAWASSEE RIVER

247 RODS E OF LEATONVILLE, Gladwin, MI

Built 2004 Load: 19.6 t ADT: 92

DASSEY RD

Good

Over: S BR LITTLE SUGAR RIVER

110 RODS S OF SOUTHWELL, Gladwin, MI

Built 1994 Load: 19.6 t ADT: 184

HAMMOND ROAD

Good

Over: GLC RR

0.9 MI W OF GARFIELD RD, Grand Traverse, MI

Built 2009 Load: 19.6 t ADT: 15,578

KEYSTONE ROAD N

Good

Over: GLC RR

0.1 MI N OF HAMMOND ROAD, Grand Traverse, MI

Built 2009 Load: 19.6 t ADT: 5,348

WARFIELD RD FH5231

Good

Over: PETERSON CREEK

0.7 MI N OF PETERSON TRL, Manistee, MI

Built 2012 Load: 19.8 t ADT: 200

JEFFERSON STREET

Good

Over: SAUK (COLDWATER) RIVER

IN COLDWATER, Branch, MI

Built 1951 Load: 20.1 t ADT: 1,658

BRIDGE ST

Good

Over: FLAT RIVER

IN BELDING, Ionia, MI

Built 2005 Load: 20.1 t ADT: 4,777

ADAMS ROAD

Good

Over: WHITE CREEK I/C DRAIN

SEC 21-28 LAMOTTE TWP, Sanilac, MI

Built 1980 Load: 20.1 t ADT: 135

WEAR ROAD

Good

Over: BRADSHAW DRAIN

SUMPTERE/RAWSONVILLE, Wayne, MI

Built 1986 Load: 20.1 t ADT: 340

E. ROBINSON RD

Good

Over: MAPLE RIVER

SEC 34 CENTER TWP, Emmet, MI

Built 2007 Load: 20.1 t ADT: 2,346

M-6 WB RMP TO 8TH

Good

Over: RUSH CREEK

JAMESTOWN TWP SEC 1, Ottawa, MI

Built 2002 Load: 20.1 t ADT: 9,300

ELY BRIDGE ROAD

Good

Over: W BR OF MAPLE RIVER

0.21 MI S OF ELY ROAD, Emmet, MI

Built 2014 Load: 20.1 t ADT: 50

10 MILE RD

Good

Over: ROUGE RIVER

BET TELEGRAPH AND BEECH, Oakland, MI

Built 1995 Load: 20.2 t ADT: 16,418

FINDLEY ROAD

Good

Over: PRAIRIE RIVER

2.5 MI SE OF CENTERVILLE, St. Joseph, MI

Built 1971 Load: 20.5 t ADT: 577

BARNES LAKE ROAD

Good

Over: NORTH BR. FLINT RIVER

SEC. 13-24 MARATHON TWP., Lapeer, MI

Built 1994 Load: 20.7 t ADT: 358

WARNER AVENUE

Good

Over: MUSKEGON RIVER

8.5 S OF FREMONT, Newaygo, MI

Built 1971 Load: 20.7 t ADT: 2,424

MCMILLAN ROAD

Good

Over: BEAR CREEK

0.3 MI W OF M-120, Muskegon, MI

Built 1972 Load: 21.1 t ADT: 79

STAR SIDING ROAD

Good

Over: STAR CREEK

1.5 MI N OF M-28, Alger, MI

Built 1993 Load: 21.1 t ADT: 5

ROUTE 442 FH76

Good

Over: STURGEON RIVER

14 MI N OF NAHMA JCT, Delta, MI

Built 2004 Load: 21.4 t ADT: 105

PHILLIPS ROAD

Good

Over: SOUTH BR WHITE CREEK

SEC 7 KINGSTON TWP, Tuscola, MI

Built 1968 Load: 21.4 t ADT: 50

NO 12 ROAD

Good

Over: MANTON CREEK

SECTION 29/32 T24N R9W, Wexford, MI

Built 2002 Load: 21.4 t ADT: 120

PINE STREET

Good

Over: MITCHELL CREEK

CITY OF BIG RAPIDS, Mecosta, MI

Built 1998 Load: 21.4 t ADT: 4,550

FENCE RIVER ROAD

Good

Over: SPRUCE RIVER

SPURR TWP SEC 1 & 2, Baraga, MI

Built 2007 Load: 21.6 t ADT: 76

COLONY ROAD

Good

Over: S FORK HAYWORTH CRK

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

Built 1965 Load: 21.7 t ADT: 1,593

COLONY ROAD

Good

Over: SO FORK OF HAYWORTH G.R.

1/4MI W OF ESSEX CENTER R, Clinton, MI

Built 1965 Load: 21.7 t ADT: 1,593

SHAFTSBURG RD

Good

Over: BEAR CREEK

4.7 MI SE OF OVID, Shiawassee, MI

Built 1959 Load: 21.7 t ADT: 125

ROSSMAN ROAD

Good

Over: S. O. DRAIN

SEC 29-32 WELLS TWP, Tuscola, MI

Built 1978 Load: 21.7 t ADT: 120

GENESEE ROAD

Good

Over: CN NORTH AMERICA

SEC. 11 ELBA TWP., Lapeer, MI

Built 2003 Load: 22.0 t ADT: 2,007

33 MILE ROAD

Good

Over: COON CREEK

0.5 MI EAST OF WOLCOTT RD, Macomb, MI

Built 1965 Load: 22.0 t ADT: 180

LONE ROAD

Good

Over: MCCLELLAN RUN

0.5 MI N OF GEDDES ROAD, Saginaw, MI

Built 1987 Load: 22.0 t ADT: 290

MORIARTEY ROAD

Good

Over: WHITE CREEK I/C DRAIN

SEC 9-16 LAMOTTE TWP, Sanilac, MI

Built 1980 Load: 22.0 t ADT: 150

OLIVER STREET

Good

Over: SHIAWASSEE RIVER

CITY OF OWOSSO, Shiawassee, MI

Built 2007 Load: 22.0 t ADT: 9,200

I-75 RAMP C

Good

Over: FRANK & POET DRAIN

IN TAYLOR, Wayne, MI

Built 1966 Load: 22.0 t ADT: 40,584

I-94 WB

Good

Over: ST CLAIR RIVER CN RR

AT PORT HURON, St. Clair, MI

Built 1938 Load: 22.4 t ADT: 7,234

M-6 WB

Good

Over: M-37

CALENDONIA TWP SEC 6, Kent, MI

Built 1997 Load: 22.4 t ADT: 20,090

MUNSON HWY

Good

Over: BEAN CREEK

0.3 MI N OF MEDINA RD, Lenawee, MI

Built 1996 Load: 22.6 t ADT: 113

GRUBER ROAD

Good

Over: SANDY CREEK

1 MI N OF BLUEBUSH ROAD, Monroe, MI

Built 2001 Load: 22.7 t ADT: 670

RUDDIMAN AVENUE

Good

Over: BEAR LAKE CHANNEL

IN NORTH MUSKEGON, Muskegon, MI

Built 1971 Load: 22.7 t ADT: 3,233

M-6 EB

Good

Over: M-37

CALEDONIA TWP SEC 6, Kent, MI

Built 1997 Load: 22.7 t ADT: 20,090

LANG RD

Good

Over: MIDDLE BR TOBACCO RIVER

30 RODS E OF MCCULLOUGH, Gladwin, MI

Built 2007 Load: 23.0 t ADT: 187

EBY ROAD

Good

Over: PINNEBOG RIVER

SEC. 15 OLIVER TWP., Huron, MI

Built 1958 Load: 23.0 t ADT: 50

BAY CREEK ROAD

Good

Over: FLAT CREEK

0.2 MI E OF SUMMIT STREET, Monroe, MI

Built 1957 Load: 23.0 t ADT: 140

WITHERSPOON ROAD

Good

Over: TAFT DRAIN

SEC 17-20 HUME TWP, Huron, MI

Built 1981 Load: 23.3 t ADT: 12

US-131 SB

Good

Over: MARKET AVE

IN GRAND RAPIDS, Kent, MI

Built 2000 Load: 23.3 t ADT: 49,600

BROWNTOWN ROAD

Good

Over: CLYMER COUNTY DRAIN

LAKE TWP SEC 35, Berrien, MI

Built 1999 Load: 23.3 t ADT: 360

Showing 6,301-6,350 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.