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)

SCHOENHERR RD NBD

Good

Over: CLINTON RIVER

0.6 MI NORTH OF UTICA RD, Macomb, MI

Built 1992 Load: 59.6 t ADT: 12,750

CHAPMAN RD

Good

Over: DEER CREEK

0.3 MI EAST OF NORTH AVE, Macomb, MI

Built 2016 Load: 60.3 t ADT: 230

29 MILE ROAD

Good

Over: DEER CREEK

0.2 MI EAST OF BATES ROAD, Macomb, MI

Built 2003 Load: 60.6 t ADT: 300

21 MILE ROAD

Good

Over: LEWIS DRAIN

0.5 MI EAST OF HAYES ROAD, Macomb, MI

Built 1975 Load: 60.7 t ADT: 20,610

28 MILE ROAD

Good

Over: CAMP BROOK DRAIN

1.2 MI E OF ROMEO PLANK, Macomb, MI

Built 1995 Load: 60.9 t ADT: 110

26 MILE ROAD

Good

Over: DEER CREEK

2.5MI W OF GRATIOT US-25, Macomb, MI

Built 2012 Load: 61.6 t ADT: 11,617

TILCH RD

Good

Over: DUNN-BANISTER DRAIN

0.5 MILE N OF M-59, Macomb, MI

Built 1979 Load: 61.9 t ADT: 4,490

33 MILE ROAD

Good

Over: CEMETERY CREEK

0.5 MI EAST OF OMO ROAD, Macomb, MI

Built 2014 Load: 63.8 t ADT: 200

33 MILE ROAD

Good

Over: HIGHBANK CREEK

0.6 MI EAST OF OMO ROAD, Macomb, MI

Built 2014 Load: 63.8 t ADT: 200

M-53 NB

Good

Over: MIDDLE BR CLINTON RIVER

5.6 MI N OF M-59, Macomb, MI

Built 1966 Load: 64.5 t ADT: 27,631

M-59 EB

Good

Over: RYAN RD

1.5 MI W OF UTICA, Macomb, MI

Built 1972 Load: 64.5 t ADT: 44,118

28 MILE ROAD

Good

Over: STONY CREEK

0.5 MI WEST OF MOUND RD, Macomb, MI

Built 1961 Load: 65.1 t ADT: 3,400

SCHOENHERR RD SBD

Good

Over: CLINTON RIVER

0.6 MI NORTH OF UTICA RD, Macomb, MI

Built 1992 Load: 65.8 t ADT: 21,510

QUINN ROAD

Good

Over: CLINTON HARRISON DRAIN

100 FT WEST OF I-94, Macomb, MI

Built 2016 Load: 66.7 t ADT: 4,538

26 MILE ROAD

Good

Over: NORTH BRANCH CLINTON R

1.2 MI WEST OF NORTH AVE, Macomb, MI

Built 1968 Load: 68.0 t ADT: 11,030

M-59 EB

Good

Over: GLOEDE DRAIN

3.1 MI E OF M-53, Macomb, MI

Built 1993 Load: 71.9 t ADT: 40,518

29 MILE ROAD

Good

Over: EAST BRANCH COON CREEK

0.2 MI EAST OF OMO ROAD, Macomb, MI

Built 2005 Load: 71.9 t ADT: 210

MT VERNON RD

Good

Over: TRIBUTARY OF STONEY CRK

0.3 MI S OF 31 MI RD, Macomb, MI

Built 2007 Load: 72.3 t ADT: 121

KELLY ROAD

Good

Over: HARRINGTON DRAIN

0.5 MI NORTH OF 15 MILE, Macomb, MI

Built 1980 Load: 80.0 t ADT: 4,700

ROMEO PLANK RD

Good

Over: HEALY BROOK DRAIN

0.1 MI NORTH OF 27 MILE, Macomb, MI

Built 1978 Load: 89.7 t ADT: 6,195

WEBER ROAD

Good

Over: BEAVER CREEK

660 FT WEST OF M-19, Macomb, MI

Built 1970 Load: 96.9 t ADT: 160

23 MILE ROAD

Good

Over: MCBRIDE DRAIN

0.25 MILES WEST OF CARD, Macomb, MI

Built 2022 Load: 97.2 t ADT: 22,800

NORTH AVENUE

Good

Over: DEER CREEK

0.2 MI NO OF 24 MILE RD, Macomb, MI

Built 1976 Load: 97.2 t ADT: 10,080

NORTH AVE

Good

Over: COON CREEK

0.4 MI NORTH OF 27 MILE, Macomb, MI

Built 1978 Load: 97.2 t ADT: 6,460

31 MILE ROAD

Good

Over: TUPPER BROOK DRAIN

0.5 MI WEST OF NORTH AVE, Macomb, MI

Built 1964 Load: 97.2 t ADT: 420

HAYES ROAD

Good

Over: PRICE BROOK DRAIN

0.25 MI S OF 28 MILE RD, Macomb, MI

Built 1979 Load: 97.2 t ADT: 210

M-53

Good

Over: STERLING RELIEF DRAIN

0.5 MI N OF 15 MILE RD, Macomb, MI

Built 1964 Load: 97.2 t ADT: 55,558

M-53

Good

Over: MOORES DRAIN

JUST S OF 17 MILE RD, Macomb, MI

Built 1988 Load: 97.2 t ADT: 61,396

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

Related

Browse all → | Rankings →
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.