Total bridges
417
Public highway bridges in Macomb County
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.
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
- 1920s 6
1920–1929
6 bridges
- 1930s 1
1930–1939
1 bridges
- 1940s 3
1940–1949
3 bridges
- 1950s 23
1950–1959
23 bridges
- 1960s
1960–1969
101 bridges
- 1970s
1970–1979
104 bridges
- 1980s 31
1980–1989
31 bridges
- 1990s
1990–1999
66 bridges
- 2000s
2000–2009
44 bridges
- 2010s 33
2010–2019
33 bridges
- 2020s 5
2020–2029
5 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).
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.
| County | Bridges | Good | Fair | Poor | Avg. built |
|---|---|---|---|---|---|
| Kent County | 523 | 36.9% | 57.7% | 5.4% | 1975 |
| Oakland County | 508 | 41.5% | 51% | 7.5% | 1982 |
| Macomb County (this page) | 417 | 42.7% | 49.6% | 7.7% | 1980 |
| Genesee County | 371 | 22.9% | 61.7% | 15.4% | 1968 |
| St. Clair County | 327 | 41.3% | 50.5% | 8.3% | 1985 |
| Saginaw County | 315 | 28.9% | 52.7% | 18.4% | 1979 |
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).
- St. Charles County, MO · 417 bridges
- Bedford County, PA · 417 bridges
- Santa Barbara County, CA · 418 bridges
- Lucas County, OH · 418 bridges
Similar average build year
Nearest mean year-built outside MI (1980 here).
- Tulsa County, OK · avg 1980 · 1,135 bridges
- Miami-Dade County, FL · avg 1980 · 1,057 bridges
- Pulaski County, AR · avg 1980 · 721 bridges
- McLennan County, TX · avg 1980 · 714 bridges
Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.
All bridges (417)
CLARK
FairOver: SALT RIVER
0.15 MI W OF M-19, Macomb, MI
Built 2007 Load: 48.9 t ADT: 3,109
M-19
FairOver: SALT RIVER
3.3 MI SW OF ST CLAIR COL, Macomb, MI
Built 1991 Load: 49.6 t ADT: 12,497
M-19
FairOver: SALT RIVER
2.7 MI SW OF ST CLAIR COL, Macomb, MI
Built 1991 Load: 49.6 t ADT: 12,497
M-53 SB
FairOver: 25 MILE RD
5.0 MI N OF M-59, Macomb, MI
Built 1966 Load: 49.9 t ADT: 27,631
BELANGER AVE
FairOver: I-696
IN ROSEVILLE, Macomb, MI
Built 1972 Load: 49.9 t ADT: 4,500
RYAN ST
FairOver: I-696
IN WARREN, Macomb, MI
Built 1972 Load: 50.2 t ADT: 28,800
CALLENS RD
FairOver: FISH CREEK
0.5 MI EAST OF SUGARBUSH, Macomb, MI
Built 1964 Load: 50.2 t ADT: 4,210
NB MOUND RD
FairOver: I-696
IN THE CITY OF WARREN, Macomb, MI
Built 1976 Load: 50.5 t ADT: 33,000
I-94 EB
FairOver: HARPER RD
0.7 MI S OF M-29, Macomb, MI
Built 1964 Load: 50.5 t ADT: 49,849
HEYDENREICH ROAD
FairOver: MIDDLE BRANCH CLINTON R
0.1 MI NORTH OF CASS AVE, Macomb, MI
Built 1988 Load: 50.9 t ADT: 11,500
HAYES RD
FairOver: I-696
IN WARREN & ROSEVILLE, Macomb, MI
Built 1973 Load: 51.2 t ADT: 28,000
WB METRO PARKWAY
FairOver: RED RUN DRAIN
0.1 MI WEST OF UTICA RD, Macomb, MI
Built 1969 Load: 51.8 t ADT: 21,115
SB & NB MOUND RD
FairOver: RED RUN DRAIN
0.1 MI N OF CHICAGO RD, Macomb, MI
Built 1996 Load: 53.5 t ADT: 77,440
M-19 NEW HAVEN RD
FairOver: I-94
@ M-19, Macomb, MI
Built 1963 Load: 53.8 t ADT: 12,256
HAYES RD
FairOver: CLINTON RIVER
0.1 MI NORTH OF UTICA RD, Macomb, MI
Built 1989 Load: 53.8 t ADT: 28,380
MOUND RD
FairOver: SHARKEY DRAIN
0.4 MI N OF 11 MILE RD, Macomb, MI
Built 1955 Load: 54.1 t ADT: 82,735
17 MILE RD
FairOver: CONRAIL RAILROAD
EAST OF MOUND RD, Macomb, MI
Built 1981 Load: 54.4 t ADT: 17,580
M-3 NB GRATIOT AVE
FairOver: I-696
IN ROSEVILLE, Macomb, MI
Built 1972 Load: 54.8 t ADT: 27,333
M-3 SB GRATIOT AVE
FairOver: I-696
IN ROSEVILLE, Macomb, MI
Built 1972 Load: 55.1 t ADT: 27,333
I-94 EB
FairOver: CLINTON RIVER N&S RDS
0.3 MI E OF MT CLEMENS, Macomb, MI
Built 1947 Load: 55.1 t ADT: 49,601
I-94
FairOver: METRO BEACH PKWY RD
1.0 MI NE OF OLD M-29, Macomb, MI
Built 1963 Load: 55.1 t ADT: 99,300
RIVERLAND DR
FairOver: CLINTON RIVER
EAST OF VAN DYKE AVE, Macomb, MI
Built 1964 Load: 55.1 t ADT: 9,479
M-53 SB
FairOver: CLINTON RIVER
1.6 MI S OF M-59, Macomb, MI
Built 1966 Load: 55.7 t ADT: 26,797
STEPHENS DR
FairOver: I-94
W LTS OF ST CLAIR SHORES, Macomb, MI
Built 1966 Load: 56.1 t ADT: 1,920
18 MILE RD
FairOver: PLUMBROOK DRAIN
0.3 MI EAST OF MOUND RD, Macomb, MI
Built 1965 Load: 56.1 t ADT: 17,350
U TURN @ AUGUSTINE
FairOver: I-696
0.1 MI E OF DEQUINDRE, Macomb, MI
Built 1972 Load: 56.7 t ADT: 147,000
M-97 GROESBECK HWY
FairOver: I-696
IN WARREN, Macomb, MI
Built 1973 Load: 56.7 t ADT: 16,768
HOLMES ROAD
FairOver: NEWLAND DRAIN
0.6 MI SOUTH OF BORDMAN, Macomb, MI
Built 1972 Load: 57.0 t ADT: 300
9 MI RD
FairOver: I-94
W LTS OF ST CLAIR SHORES, Macomb, MI
Built 1967 Load: 58.0 t ADT: 20,830
NB SERVICE RD
FairOver: RAMPS C&E OFF I-696
CITY OF WARREN, Macomb, MI
Built 1976 Load: 58.6 t ADT: 24,323
M-53 NB
FairOver: CLINTON RIVER
1.6 MI S OF M-59, Macomb, MI
Built 1966 Load: 59.0 t ADT: 62,178
10 MI RD
FairOver: I-94
W LTS OF ST CLAIR SHORES, Macomb, MI
Built 1965 Load: 59.7 t ADT: 11,820
9 MI RD SB TURN RD
FairOver: I-94
IN ST CLAIR SHORES, Macomb, MI
Built 1964 Load: 61.9 t ADT: 1,800
28 MILE ROAD
FairOver: HEALY BROOK DRAIN
0.4 MI W OF ROMEO PLANK, Macomb, MI
Built 1972 Load: 62.2 t ADT: 160
SB SERVICE RD
FairOver: RAMPS D&H OFF I-696
CITY OF WARREN, Macomb, MI
Built 1976 Load: 63.2 t ADT: 24,323
10 MI RD S INT
FairOver: I-94
W LTS OF ST CLAIR SHORES, Macomb, MI
Built 2002 Load: 63.2 t ADT: 4,800
I-94
FairOver: 14 MILE RD
N LTS ST CLAIR SHORES, Macomb, MI
Built 1964 Load: 63.5 t ADT: 99,698
MOUND RD
FairOver: STERLING RELIEF DRAIN
0.5 MI NORTH OF 15 MILE, Macomb, MI
Built 1977 Load: 64.5 t ADT: 61,212
29 MILE ROAD
FairOver: TUPPER BROOK
100FT EAST OF HARTWAY RD, Macomb, MI
Built 1980 Load: 65.8 t ADT: 2,830
15 MILE RD
FairOver: BIG BEAVER DRAIN
WEST OF RYAN RD, Macomb, MI
Built 1984 Load: 66.7 t ADT: 26,949
WEST ARCHER DRIVE
FairOver: CHANNEL TO LAKE ST CLAIR
0.2 MI S OF S RIVER RD, Macomb, MI
Built 2023 Load: 67.4 t ADT: 120
34 MILE ROAD
FairOver: COON CREEK
0.2 MI WEST OF COON CREEK, Macomb, MI
Built 1975 Load: 79.1 t ADT: 90
NORTH AVE
FairOver: E B COON CREEK
0.8 MI NORTH OF 33 MILE, Macomb, MI
Built 1994 Load: 80.4 t ADT: 6,100
33 MILE ROAD
FairOver: EAST BRANCH COON CREEK
0.2 MI EAST OF NORTH AVE, Macomb, MI
Built 1983 Load: 89.4 t ADT: 190
32 MILE ROAD
FairOver: COON CREEK
0.9MI WEST OF NORTH AVE, Macomb, MI
Built 1968 Load: 92.3 t ADT: 6,300
IRWIN ROAD
FairOver: NEWLAND DRAIN
0.1 MI E OF ROMEO PLANK, Macomb, MI
Built 1971 Load: 93.6 t ADT: 70
12 MILE ROAD
FairOver: BEAR CREEK
0.25 MI EAST OF MOUND RD, Macomb, MI
Built 1955 Load: 97.2 t ADT: 19,562
24 MILE ROAD
FairOver: MIDDLE BRANCH CLINTON R
0.5 MI EAST OF MOUND RD, Macomb, MI
Built 1964 Load: 97.2 t ADT: 10,280
ARMADA CENTER RD
FairOver: NEWLAND DRAIN
0.2 MI W OF ROMEO PLANK, Macomb, MI
Built 1975 Load: 97.2 t ADT: 1,600
SCHOENHERR RD
FairOver: STERLING RELIEF DRAIN
0.5 MI S OF 16 MILE RD, Macomb, MI
Built 1971 Load: 97.2 t ADT: 29,860
Read our methodology - how this data is sourced, computed, and verified.
Related
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.