County profile · official public datasets

Macomb County, MI

417 public highway bridges tracked in the FHWA National Bridge Inventory: 42.7% rated Good, 49.6% Fair, 7.7% Poor.

417
Public bridges
42.7%
Good condition
7.7%
Poor condition

The verdict

According to the Federal Highway Administration's 2024 National Bridge Inventory.

Macomb County posts a better-than-median Poor-condition share among rated counties in the state across mid-size county bridge inventory.

Top 36%
lowest Poor share in state
7.7%
Poor-condition share
417
public highway bridges
1980
avg year built

Poor is an FHWA condition category from the lowest applicable component rating (4 or below), not a live crossing-safety or closure decision. Rankings cover counties with at least five public highway bridges.

Macomb County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Macomb County ranks #30 of 83 Michigan counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 7.7%). Macomb County, Michigan contains 417 public highway bridges. Roughly 42.7% are rated “Good,” 49.6% “Fair,” and 7.7% “Poor.” Poor means the lowest applicable deck, superstructure, substructure, or culvert rating is 4 or below on the 0–9 NBI scale. It is a condition category, not a live safety or closure decision.

Responsible agencies inspect covered bridges on risk-based intervals under current NBIS rules and submit inventory data to FHWA annually. The list below shows every NBI-tracked bridge in the county. Use the “Sort by” controls to change the ordering, and click any row for its reported inspection date, traffic count, and condition fields.

Source: FHWA National Bridge Inventory. See methodology for full definitions.

Total bridges

417

Public highway bridges in Macomb County

Good condition

42.7%

178 of 417 rated 7-9

Fair condition

49.6%

207 of 417 rated 5-6

Poor condition

7.7%

32 of 417 rated 4 or below

In-state Poor-share rank

#30 of 83

Among Michigan counties with 5+ bridges, lower share ranks better

Condition distribution

Share of 417 NBI-tracked bridges by lowest applicable component rating.

Good
42.7% (178)
Fair
49.6% (207)
Poor
7.7% (32)

Macomb County's Poor-condition bridges carry 212,104 vehicle crossings a day

That is 3.3% of the county's reported daily bridge traffic on 7.7% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 6,628 crossings a day against 12,107 for a Good-condition one. A Poor rating is a condition category, not a closure or a live safety judgement; it means the lowest applicable component rating is 4 or below.

Computed over the 416 of 417 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.

48.2% of Macomb County's bridges have passed the 50-year mark

201 of the 417 bridges with a recorded construction year were built in 1974 or earlier. Age alone is not a defect: a well-maintained older bridge can rate Good, and 42.7% of this county's inventory does. Even so, this older cohort is the population from which future Poor ratings are drawn, which is why the age profile below matters alongside the condition split above.

Cutoff derives from the 2024 release year minus a 50-year design life. Source: FHWA National Bridge Inventory, 2024 release.

One structure carries 17.8% of the county's Poor-condition bridge traffic

M-3 & M-29 over I-94, built 1963, carries 37,832 vehicles a day, the most of any Poor-rated structure here. The county's Poor-condition exposure is concentrated rather than evenly spread, so the 32-bridge count understates how much of the daily burden sits on a single crossing.

Share is of the 212,104 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.

When Macomb County's bridges were built

417 bridges with a recorded construction year, grouped by decade

bridges

What this shows Construction peaked in the 1970s, when 104 of the county's bridges still in the inventory were built, which is 24.9% of those with a recorded year. That cohort is now 45 to 54 years old in the 2024 inventory. Its average build year (1980) matches the Michigan average (1976).

Source FHWA National Bridge Inventory (year built) As of 2024 NBI release

How Macomb County compares with Michigan's closest counties by inventory size

The 5 Michigan counties nearest Macomb County in number of bridges, with their condition splits. Its 7.7% Poor share is the 3rd-lowest of these 6. Its average build year of 1980 against a peer-group mean of 1978 is in line with the group.

Showing the 5 closest of 82 Michigan counties eligible for comparison.

Bridge inventory size and condition shares for Macomb County and the 5 Michigan counties closest to it in inventory size
County Bridges Poor
Kent County 523 5.4%
Oakland County 508 7.5%
Macomb County (this page) 417 7.7%
Genesee County 371 15.4%
St. Clair County 327 8.3%
Saginaw County 315 18.4%

Each share is of that county's own total tracked bridges; peers are the counties with 5 or more bridges whose inventory size is closest to Macomb County's. Source: FHWA National Bridge Inventory, 2024 release.

Nationwide counties with similar inventory size or average build year

Two NBI-derived peer sets for Macomb County, both outside Michigan so the neighborhoods are not the same-state size table above.

Similar inventory size

Nearest county inventories outside MI (417 bridges here).

Similar average build year

Nearest mean year-built outside MI (1980 here).

Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.

All 417 Good 178 Fair 207 Poor 32

Good-condition bridges (178)

M-3 NB

Good

Over: CLINTON RIVER

IN MT CLEMENS, Macomb, MI

Built 2011 Load: 10.7 t ADT: 18,500

WASHINGTON ST

Good

Over: CREPEAU CREEK

400 FT N OF GREEN STREET, Macomb, MI

Built 1968 Load: 17.2 t ADT: 9,770

33 MILE ROAD

Good

Over: COON CREEK

0.5 MI EAST OF WOLCOTT RD, Macomb, MI

Built 1965 Load: 22.0 t ADT: 180

25 MILE ROAD

Good

Over: FISH CREEK

0.5 MI EAST OF GRATIOT, Macomb, MI

Built 1995 Load: 24.6 t ADT: 480

14 MILE ROAD

Good

Over: RED RUN DRAIN

310 FT W OF HOOVER RD, Macomb, MI

Built 2009 Load: 27.2 t ADT: 17,100

26 MILE ROAD

Good

Over: SALT RIVER

0.5MI EAST OF GRATIOT AVE, Macomb, MI

Built 1996 Load: 27.2 t ADT: 8,910

X OVER W/MOUND RD

Good

Over: M-59

0.5 WEST OF UTICA, Macomb, MI

Built 1994 Load: 29.8 t ADT: 35,600

22 MI RD

Good

Over: M-53

2.0 MI N OF M-59, Macomb, MI

Built 1965 Load: 30.8 t ADT: 13,387

HARPER AVE

Good

Over: CLINTON RIVER SPILLWAY

0.6 MI NORTH OF 16 MILE, Macomb, MI

Built 1951 Load: 30.8 t ADT: 11,600

M-59 WB

Good

Over: MIDDLE BR CLINTON RIVER

4.2 MILES E OF M-53, Macomb, MI

Built 1996 Load: 30.8 t ADT: 31,800

IRIS DRIVE

Good

Over: SUTHERLAND - OEMIG DRAIN

0.1 MI SE OF DONNER RD, Macomb, MI

Built 1999 Load: 31.8 t ADT: 250

SB MOUND RD

Good

Over: M-59

0.5 MI. WEST OF UTICA, Macomb, MI

Built 1994 Load: 32.1 t ADT: 11,100

M-53 NB

Good

Over: 24 MILE RD

4.0 MI N OF M-59, Macomb, MI

Built 1965 Load: 32.4 t ADT: 27,631

SHERWOOD AVE

Good

Over: I-696 &RAMPS B C H &F

CITY OF WARREN, Macomb, MI

Built 1975 Load: 32.4 t ADT: 12,000

EB METRO PARKWAY

Good

Over: CLINTON RIVER SPILLWAY

0.02 MI E OF UNION LAKE, Macomb, MI

Built 1964 Load: 32.4 t ADT: 14,905

ARMADA CENTER RD

Good

Over: EAST BRANCH COON CREEK

0.2 MI EAST OF NORTH AVE, Macomb, MI

Built 2002 Load: 32.4 t ADT: 1,260

ROMEO PLANK RD

Good

Over: GLOEDE DRAIN

0.5 MILES SOUTH OF M-59, Macomb, MI

Built 2009 Load: 32.4 t ADT: 20,070

24 MILE ROAD

Good

Over: FISH CREEK

0.3 MI WEST OF SASS ROAD, Macomb, MI

Built 1999 Load: 32.4 t ADT: 2,870

24 MILE ROAD

Good

Over: SALT RIVER

0.1 MI WEST OF BAKER ROAD, Macomb, MI

Built 1996 Load: 32.4 t ADT: 4,270

18.5 MILE RD

Good

Over: PLUM BROOK DRAIN

EAST OF RYAN RD, Macomb, MI

Built 2000 Load: 32.4 t ADT: 1,585

SEAWAY DRIVE

Good

Over: CANAL TO SEAWAY ISLAND

EAST END OF SEAWAY DRIVE, Macomb, MI

Built 1965 Load: 32.6 t ADT: 536

U TRN E/MOUND RD

Good

Over: M-59

0.5 MI WEST OF UTICA, Macomb, MI

Built 1994 Load: 32.7 t ADT: 8,500

WB METRO PARKWAY

Good

Over: HARRINGTON DRAIN

0.75 MI WEST OF M-97, Macomb, MI

Built 1952 Load: 32.7 t ADT: 18,950

23 MILE RD

Good

Over: MIDDLE BR CLINTON RIVER

0.1MI EAST OF ROMEO PLANK, Macomb, MI

Built 2006 Load: 32.7 t ADT: 15,350

NB & SB MOUND RD

Good

Over: BIG BEAVER CREEK

0.5 MI N OF 14 MILE RD, Macomb, MI

Built 1996 Load: 32.7 t ADT: 78,001

GARFIELD RD

Good

Over: CLINTON RIVER

0.1 MI S OF CLINTON R RD, Macomb, MI

Built 1986 Load: 32.7 t ADT: 32,581

NORTH AVE

Good

Over: COON CREEK

0.3 MI NORTH OF 31 MILE, Macomb, MI

Built 1999 Load: 32.7 t ADT: 7,160

30 MILE ROAD

Good

Over: COON CREEK

0.1 MI EAST OF NORTH AVE, Macomb, MI

Built 1994 Load: 32.7 t ADT: 180

MONTE RD

Good

Over: FULLER DRAIN

0.4 MI N OF SUGARBUSH RD, Macomb, MI

Built 1998 Load: 32.7 t ADT: 1,510

SANTA ANITA DRIVE

Good

Over: FULLER DRAIN

0.4 MI N OF SUGARBUSH RD, Macomb, MI

Built 1998 Load: 32.7 t ADT: 200

BROUGHTON RD

Good

Over: MCBRIDE DRAIN

0.3 MI S OF 25 MILE RD, Macomb, MI

Built 2001 Load: 32.7 t ADT: 1,180

HAVERHILL DR

Good

Over: SALT SLING GLOEDE DRAIN

100 FT W OF GARFIELD RD, Macomb, MI

Built 2004 Load: 32.7 t ADT: 80

14 MILE RD

Good

Over: BIG BEAVER CREEK

0.3 MI W OF VAN DYKE, Macomb, MI

Built 1973 Load: 33.0 t ADT: 27,068

34 MILE ROAD

Good

Over: HIGHBANK CREEK

0.9 MI EAST OF OMO ROAD, Macomb, MI

Built 1997 Load: 33.2 t ADT: 100

M-53

Good

Over: BEAVER CREEK

IN WARREN, Macomb, MI

Built 1964 Load: 33.4 t ADT: 55,558

MCPHALL ROAD

Good

Over: EAST BRANCH COON CREEK

0.2 MI WEST OF NORTH AVE, Macomb, MI

Built 2000 Load: 33.4 t ADT: 190

25 MILE ROAD

Good

Over: MIDDLE BR CLINTON RIVER

0.1 MI E OF ROMEO PLANK, Macomb, MI

Built 1988 Load: 33.4 t ADT: 9,581

25 MILE ROAD

Good

Over: MCBRIDE DRAIN

1.5 MI E OF ROMEO PLANK, Macomb, MI

Built 1997 Load: 33.5 t ADT: 4,210

M-59 EB

Good

Over: MIDDLE BR CLINTON RIVER

4.2 MI E OF M-53, Macomb, MI

Built 1996 Load: 33.7 t ADT: 31,800

HEYDENREICH ROAD

Good

Over: MILLER DRAIN

0.5 MI NORTH OF CASS AVE, Macomb, MI

Built 1990 Load: 33.9 t ADT: 7,290

CRIMSON DRIVE

Good

Over: PRICE BROOK DRAIN

0.2 MI S OF 29 MILE RD, Macomb, MI

Built 2002 Load: 34.0 t ADT: 150

27 MILE ROAD

Good

Over: KIRKHAM DRAIN

0.8 MI EAST OF GRATIOT, Macomb, MI

Built 1994 Load: 34.2 t ADT: 290

GARFIELD RD

Good

Over: SALT SLANG GLOEDE DRAIN

MACOMB TWP SEC 31 & 32, Macomb, MI

Built 1993 Load: 34.3 t ADT: 22,188

30 MILE ROAD

Good

Over: HEALY BROOK DRAIN

1.3 MI EAST OF VAN DYKE, Macomb, MI

Built 2008 Load: 34.6 t ADT: 350

M-53 NB

Good

Over: 27 MILE RD

7.1 MI N OF M-59, Macomb, MI

Built 1966 Load: 34.7 t ADT: 20,848

CALLENS RD

Good

Over: SALT RIVER

0.5 SOUTH OF 23 MILE ROAD, Macomb, MI

Built 1983 Load: 34.7 t ADT: 4,200

RYAN RD

Good

Over: CLINTON RIVER

0.8 MI S OF 23 MILE ROAD, Macomb, MI

Built 1964 Load: 35.3 t ADT: 12,980

M-59 EB

Good

Over: N BR CLINTON RIVER

0.7 MILES W OF M-97, Macomb, MI

Built 1996 Load: 35.3 t ADT: 31,800

DEQUINDRE RD

Good

Over: RED RUN DRAIN

0.1 MI N OF CHICAGO RD, Macomb, MI

Built 1970 Load: 35.4 t ADT: 26,740

18 MILE RD

Good

Over: GIBSON DRAIN

0.3 MI EAST OF DEQUINDRE, Macomb, MI

Built 1985 Load: 35.6 t ADT: 18,030

Read our methodology - how this data is sourced, computed, and verified.

Related

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Data sourced from official public datasets. See our methodology for details. Retrieved and formatted by PlainBridges

Every figure on PlainBridges is rendered directly from federal source data, no number is typed in by an editor. This page draws directly on federal source data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. NBI condition categories reflect the latest reported inventory record, not a live safety, closure, or travel decision.