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)
11 MI RD WB
FairOver: MND RD &RMPS C&D O I-696
CITY OF WARREN, Macomb, MI
Built 1977 Load: 35.6 t ADT: 6,098
FRAZHO RD
FairOver: I-94
W LTS OF ST CLAIR SHORES, Macomb, MI
Built 1967 Load: 35.6 t ADT: 1,850
22 MILE ROAD
FairOver: MIDDLE BR CLINTON RIVER
0.1 MI E OF ROMEO PLANK, Macomb, MI
Built 1993 Load: 35.6 t ADT: 12,400
21 MI RD
FairOver: M-53
1.0 MI N OF M-59, Macomb, MI
Built 1965 Load: 36.0 t ADT: 17,272
RYAN ROAD
FairOver: RED RUN DRAIN
0.37 MI S OF 14 MI RD, Macomb, MI
Built 1991 Load: 36.0 t ADT: 25,900
M-29
FairOver: MARSAC CREEK
IN NEW BALTIMORE, Macomb, MI
Built 1952 Load: 36.3 t ADT: 20,326
SCHOENHERR RD
FairOver: MIDDLE BR CLINTON RIVER
0.1 MI NORTH OF 25 MILE, Macomb, MI
Built 1969 Load: 36.5 t ADT: 5,309
M-53 NB
FairOver: CANAL RD
0.4 MI S OF M-59, Macomb, MI
Built 1966 Load: 36.6 t ADT: 26,797
M-53 SB
FairOver: 24 MILE RD
4.0 MI N OF M-59, Macomb, MI
Built 1965 Load: 36.6 t ADT: 27,631
HOOVER RD
FairOver: I-696
IN WARREN, Macomb, MI
Built 1972 Load: 36.6 t ADT: 41,000
31 MILE ROAD
FairOver: N BRANCH CLINTON RIVER
0.4 MI E OF ROMEO PLANK, Macomb, MI
Built 1972 Load: 36.6 t ADT: 497
15 MILE RD
FairOver: RED RUN DRAIN
EAST OF SCHOENHERR RD, Macomb, MI
Built 1992 Load: 36.6 t ADT: 23,432
M-59 EB
FairOver: M-53
M-59 EB OV M-53, Macomb, MI
Built 1994 Load: 36.9 t ADT: 43,575
DICKINSON ST
FairOver: CLINTON RIVER
EAST OF GRATIOT, Macomb, MI
Built 1953 Load: 36.9 t ADT: 8,263
M-53 SB
FairOver: EAST POND CREEK
0.1 MI S OF 33 MILE RD, Macomb, MI
Built 1990 Load: 37.3 t ADT: 14,182
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
36 MILE RD
FairOver: SECORD LAKE OUTLET
3.5 MILES WEST OF M-53, Macomb, MI
Built 1966 Load: 37.9 t ADT: 238
29 MILE ROAD
FairOver: COON CREEK
0.6 MI EAST OF NORTH AVE, Macomb, MI
Built 1972 Load: 37.9 t ADT: 201
BURK STREET
FairOver: EAST BR OF COON CREEK
SEC 23 ARMADA TWP, Macomb, MI
Built 1982 Load: 37.9 t ADT: 400
M-53 SB
FairOver: CANAL RD
0.4 MI S OF M-59, Macomb, MI
Built 1966 Load: 38.1 t ADT: 26,797
NB MOUND RD
FairOver: M-59
0.5 MI. WEST UTICA, Macomb, MI
Built 1994 Load: 38.2 t ADT: 11,100
CLINTON RIVER RD
FairOver: M-53
1.2 MI S OF M-59, Macomb, MI
Built 1966 Load: 38.6 t ADT: 2,850
CAMP GROUND ROAD
FairOver: EAST MILL LAKE OUTLET
300 FT NORTH OF 33 MILE, Macomb, MI
Built 1969 Load: 38.6 t ADT: 340
SB MOUND RD
FairOver: PLUM BROOK DRAIN
0.3 MI N OF 18 MILE RD., Macomb, MI
Built 1991 Load: 38.9 t ADT: 16,870
BARKMAN AVE
FairOver: I-696
IN ROSEVILLE, Macomb, MI
Built 1972 Load: 39.2 t ADT: 4,500
ARSENAL AVE GATE36
FairOver: BEAR CREEK
BTWN MOUND RD ENTR GATE, Macomb, MI
Built 1952 Load: 39.2 t ADT: 1,000
M-53 NB
FairOver: 25 MILE RD
5.0 MI N OF M-59, Macomb, MI
Built 1966 Load: 39.5 t ADT: 27,631
32 MILE ROAD
FairOver: E B COON CREEK
0.6MI EAST OF NORTH AVE, Macomb, MI
Built 1976 Load: 39.5 t ADT: 6,200
FAIRFIELD AVE
FairOver: I-696
IN WARREN, Macomb, MI
Built 1973 Load: 39.9 t ADT: 9,000
KUNSTMAN RD
FairOver: CAMP BROOK DRAIN
0.3 MI NORTH OF 28 MILE, Macomb, MI
Built 1972 Load: 39.9 t ADT: 160
M-53 SB
FairOver: PLUM CREEK
3.2 MI S OF M-59, Macomb, MI
Built 1988 Load: 40.2 t ADT: 30,475
21 MI RD
FairOver: I-94
1.1 MI NE OF M-59, Macomb, MI
Built 1960 Load: 40.2 t ADT: 16,870
CO LINE RD
FairOver: I-94
ST CLAIR CO LINE, Macomb, MI
Built 1963 Load: 40.2 t ADT: 6,252
M-59
FairOver: CLINTON RIVER
IN UTICA, Macomb, MI
Built 1994 Load: 40.5 t ADT: 80,406
M-59 EB
FairOver: I-94
CHESTERFIELD/HARRISON TWP, Macomb, MI
Built 1996 Load: 40.5 t ADT: 31,800
M-53
FairOver: RED RUN DRAIN
IN WARREN, Macomb, MI
Built 1964 Load: 40.8 t ADT: 55,558
I-94
FairOver: CLINTON RIVER SPILLWAY
2.1 MI SE OF MT CLEMENS, Macomb, MI
Built 1959 Load: 40.8 t ADT: 99,300
I-94 WB
FairOver: CLINTON RIVER N&S RDS
0.2 MI E OF MT CLEMENS, Macomb, MI
Built 1963 Load: 40.8 t ADT: 49,601
M-59 WB
FairOver: I-94
CHESTERFIELD/HARRISON TWP, Macomb, MI
Built 1996 Load: 40.8 t ADT: 31,800
NB SERVICE RD
FairOver: RAMPS B&G OFF I-696
CITY OF WARREN, Macomb, MI
Built 1976 Load: 41.5 t ADT: 24,323
SCHOENHERR LFT TRN
FairOver: I-696
IN WARREN @ SCHOENHERR, Macomb, MI
Built 1973 Load: 41.8 t ADT: 2,000
COTTON RD
FairOver: I-94
1.0 MI S OF M-29, Macomb, MI
Built 1963 Load: 41.8 t ADT: 4,369
M-19
FairOver: SALT RIVER
5.2 MI SW OF ST CLAIR COL, Macomb, MI
Built 1991 Load: 42.1 t ADT: 13,180
ARSENAL AVE
FairOver: I-696
IN WARREN & CENTERLINE, Macomb, MI
Built 1972 Load: 42.4 t ADT: 4,500
GROVELAND AVE
FairOver: I-696
IN ROSEVILLE, Macomb, MI
Built 1972 Load: 42.4 t ADT: 12,000
12 MI RD S INTERCH
FairOver: I-94
W LTS OF ST CLAIR SHORES, Macomb, MI
Built 1967 Load: 42.4 t ADT: 3,500
I-696 RAMP N TO W
FairOver: I-94
IN ST CLAIR SHORES, Macomb, MI
Built 1972 Load: 42.6 t ADT: 27,250
M-53 SB
FairOver: 29 MILE RD
3.0 MI S OF ROMEO, Macomb, MI
Built 1990 Load: 42.8 t ADT: 17,107
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.