Total Bridges
11,371
Public highway bridges in Michigan
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
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.
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
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
ND
North Dakota
10.98% top marginal rate
MI
Michigan
11.27% top marginal rate
LA
Louisiana
11.48% top marginal rate
PA
Pennsylvania
12.58% top marginal rate
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
PoorOver: AU TRAIN RIVER
0.75 MI E OF AU TRAIN, Alger, MI
Built 1910 Load: 0.0 t
HAZE ROAD
PoorOver: BETSIE RIVER
1 MI W OF THOMPSONVILLE, Benzie, MI
Built 1900 Load: 0.0 t ADT: 32
BRINK ROAD
PoorOver: HOG CREEK DRAIN #40
BRONSON TWP SEC 28, Branch, MI
Built 1905 Load: 0.0 t ADT: 111
GOWER ROAD
PoorOver: COLDWATER RIVER
UNION TWP SEC 10-15, Branch, MI
Built 1900 Load: 0.0 t ADT: 111
DEXTER TRAIL
PoorOver: MUSKRAT CREEK
0.2 MI N OF CENTERLINE RD, Clinton, MI
Built 1980 Load: 0.0 t ADT: 136
COPPS MINE ROAD
PoorOver: PRESQUE ISLE RIVER
SEC 28 MARENISCO TWP, Gogebic, MI
Built 1906 Load: 0.0 t ADT: 10
All Bridges in Michigan
US-127 NB
FairOver: FRED MEIJER STATE TRAIL
0.5 MI N OF M-21, Clinton, MI
Built 1993 Load: 37.6 t ADT: 9,978
CLARK RD
FairOver: I-69 & US-127
3 MI N OF INGHAM CO LINE, Clinton, MI
Built 1971 Load: 37.6 t ADT: 3,506
M-21
FairOver: WALTZ & STURGIS DRAIN
SORREL ST IN FOWLER, Clinton, MI
Built 2005 Load: 37.6 t ADT: 3,160
I-75 NB
FairOver: FLUSHING RD
N OF FLINT RIVER, Genesee, MI
Built 1958 Load: 37.6 t ADT: 76,600
DODGE RD
FairOver: I-75
2.1 MI S OF M-57, Genesee, MI
Built 1958 Load: 37.6 t ADT: 2,145
I-75 RAMP L
FairOver: SWARTZ CREEK
NB I-75 RMP TO MILLER RD, Genesee, MI
Built 1969 Load: 37.6 t ADT: 4,200
CALHOUN ROAD
FairOver: MIDDLE BR TOBACCO RIVER
0.5 MI EAST OF W CO LINE, Gladwin, MI
Built 1980 Load: 37.6 t ADT: 205
GLIDDEN RD
FairOver: TOBACCO RIVER
175 RODS E OF M18, Gladwin, MI
Built 1987 Load: 37.6 t ADT: 880
US-2
FairOver: MIDDLE BR ONTONAGON
6.2 MI W OF US-45, Gogebic, MI
Built 1964 Load: 37.6 t ADT: 977
PARK STREET
FairOver: BOARDMAN RIVER
IN TRAVERSE CITY, Grand Traverse, MI
Built 1956 Load: 37.6 t ADT: 3,824
US-127 NB
FairOver: MDOT RR CORRIDOR
0.5 MI E OF ITHACA, Gratiot, MI
Built 1959 Load: 37.6 t ADT: 8,987
M-38
FairOver: W BR STURGEON RIVER
2.7 MI W OF BARAGA COL, Houghton, MI
Built 1934 Load: 37.6 t ADT: 679
THOMAS ROAD
FairOver: BAD AXE DRAIN
SEC. 34-35 MEADE TWP., Huron, MI
Built 1990 Load: 37.6 t ADT: 120
I-496 & US-127 SB
FairOver: I-96 EB
I-96 & I-496/US127 INTRCH, Ingham, MI
Built 1966 Load: 37.6 t ADT: 16,286
I-94 BL EB
FairOver: I-94
@ I-94 BL, Kalamazoo, MI
Built 1955 Load: 37.6 t ADT: 3,921
I-196 WB FR US-131
FairOver: I-196 EB
IN GRAND RAPIDS, Kent, MI
Built 1964 Load: 37.6 t ADT: 6,810
US-131 SB
FairOver: W RIVER DR & MDOT RR COR
1.3 MI N OF I-96, Kent, MI
Built 1969 Load: 37.6 t ADT: 29,425
HORTON RD
FairOver: BEAR CREEK DRAIN
0.1 MI E OF TUTTLE RD, Lenawee, MI
Built 1989 Load: 37.6 t ADT: 164
SPENCER RD
FairOver: I-96
0.8 MI NW OF US-23, Livingston, MI
Built 1962 Load: 37.6 t ADT: 3,100
CLYDE ROAD
FairOver: N ORE CREEK
SEC 5-8 HARTLAND TWP, Livingston, MI
Built 1946 Load: 37.6 t ADT: 6,080
OLD SENEY
FairOver: E BR OF FOX RIVER
1 MI E SCHOOLCRAFT CO LIN, Luce, MI
Built 1987 Load: 37.6 t ADT: 25
US-2
FairOver: CUT RIVER
4.3 MI NW OF BREVORT, Mackinac, MI
Built 1947 Load: 37.6 t ADT: 4,450
I-75 SB
FairOver: OLD US-2
4.0 MI NE OF M-123, Mackinac, MI
Built 1963 Load: 37.6 t ADT: 4,400
M-53
FairOver: BEAR CREEK
IN WARREN, Macomb, MI
Built 1960 Load: 37.6 t ADT: 50,187
BUNERT RD
FairOver: I-696
IN WARREN, Macomb, MI
Built 1973 Load: 37.6 t ADT: 7,468
M-29
FairOver: SALT RIVER
0.7 MI W OF NEW BALTIMORE, Macomb, MI
Built 1972 Load: 37.6 t ADT: 37,832
M-18
FairOver: US-10
@ M-18, Midland, MI
Built 1962 Load: 37.6 t ADT: 4,500
US-23
FairOver: M-50
IN DUNDEE, Monroe, MI
Built 1958 Load: 37.6 t ADT: 34,524
LAKE HARBOR ROAD
FairOver: MONA LAKE CHANNEL
IN NORTON SHORES, Muskegon, MI
Built 1982 Load: 37.6 t ADT: 8,000
WOOD RD
FairOver: YONKERS DRAIN
0.5 MI S OF PONTALUNA RD, Muskegon, MI
Built 1999 Load: 37.6 t ADT: 400
GREENWOOD ROAD
FairOver: I-75
7.0 MI S OF WEST BRANCH, Ogemaw, MI
Built 1970 Load: 37.6 t ADT: 2,188
M-28 M-64
FairOver: MERRYWEATHER CREEK
0.1 MI E OF W JET M-64, Ontonagon, MI
Built 1932 Load: 37.6 t ADT: 2,120
LEROY RD
FairOver: US-131
1.3 MI W OF LEROY, Osceola, MI
Built 1985 Load: 37.6 t ADT: 1,500
US-10
FairOver: HERSEY RIVER
IN REED CITY, Osceola, MI
Built 1958 Load: 37.6 t ADT: 6,569
LAKESHORE AVE
FairOver: C&O RAILROAD
0.03 MI N OF CROSWELL ST, Ottawa, MI
Built 1978 Load: 37.6 t ADT: 4,410
M-18
FairOver: I-75
2.0 MI S OF ROSCOMMON, Roscommon, MI
Built 1971 Load: 37.6 t ADT: 2,961
KENO ROAD (CR 602)
FairOver: S BR AU SABLE RIVER
SECTION 8&9 T24N R1W, Roscommon, MI
Built 1976 Load: 37.6 t ADT: 161
I-75 NB
FairOver: BIRCH RUN CREEK
4.1 MI NW OF GENESEE COL, Saginaw, MI
Built 1961 Load: 37.6 t ADT: 25,771
NORMAN STREET
FairOver: VET.MEM.PARKWAY
CITY OF SAGINAW, Saginaw, MI
Built 1971 Load: 37.6 t ADT: 2,500
M-53
FairOver: N BR CASS RIVER
2.5 MI S OF HURON CO LINE, Sanilac, MI
Built 1985 Load: 37.6 t ADT: 4,062
I-69 WB
FairOver: BATH RD
2.5 MILES W OF PERRY, Shiawassee, MI
Built 1988 Load: 37.6 t ADT: 20,138
M-21
FairOver: SHIAWASSEE RIVER
IN OWOSSO, Shiawassee, MI
Built 1970 Load: 37.6 t ADT: 22,689
MEISNER RD
FairOver: I-94
1.6 MI NE OF MACOMB COL, St. Clair, MI
Built 1964 Load: 37.6 t ADT: 500
CHURCH RD
FairOver: I-94
3.2 MI NE OF MACOMB COL, St. Clair, MI
Built 1964 Load: 37.6 t ADT: 450
RINGLE ROAD
FairOver: SELLARS DRAIN
SEC 27-28 AKRON TWP, Tuscola, MI
Built 1960 Load: 37.6 t ADT: 138
MURRAY ROAD
FairOver: SUCKER CREEK DRAIN
SEC 32-33 WELLS TWP, Tuscola, MI
Built 1965 Load: 37.6 t ADT: 105
I-196BLEB(PHOENIX)
FairOver: I-196
0.5 MI E OF SOUTH HAVEN, Van Buren, MI
Built 1972 Load: 37.6 t ADT: 5,370
CR 384
FairOver: S BR BLACK RIVER
2.0 MI EAST OF M-43, Van Buren, MI
Built 1973 Load: 37.6 t ADT: 1,155
US-23 NB
FairOver: I-94
@ US-23, Washtenaw, MI
Built 1962 Load: 37.6 t ADT: 27,274
M-153
FairOver: CSX RR
1M E OF I-275 IN WESTLAND, Wayne, MI
Built 1982 Load: 37.6 t ADT: 46,461
Showing 2,901-2,950 of 11,371 bridges
Related
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.