Total bridges
371
Public highway bridges in Genesee County
County profile · official public datasets
Genesee County, MI
371 public highway bridges tracked in the FHWA National Bridge Inventory: 22.9% rated Good, 61.7% Fair, 15.4% Poor.
- 371
- Public bridges
- 22.9%
- Good condition
- 15.4%
- Poor condition
The verdict
According to the Federal Highway Administration's 2024 National Bridge Inventory.
Genesee County pairs a higher-than-median Poor-condition share among rated counties in the state with an older average build year than the state inventory.
- 57th
- of 83 on Poor share
- 15.4%
- Poor-condition share
- 371
- public highway bridges
- 1968
- 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.
Genesee County Bridge Snapshot
According to the Federal Highway Administration's 2024 National Bridge Inventory, Genesee County ranks #57 of 83 Michigan counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 15.4%). Genesee County, Michigan contains 371 public highway bridges. Roughly 22.9% are rated “Good,” 61.7% “Fair,” and 15.4% “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
22.9%
85 of 371 rated 7-9
Fair condition
61.7%
229 of 371 rated 5-6
Poor condition
15.4%
57 of 371 rated 4 or below
In-state Poor-share rank
#57 of 83
Among Michigan counties with 5+ bridges, lower share ranks better
Condition distribution
Share of 371 NBI-tracked bridges by lowest applicable component rating.
Good 22.9% (85)
Fair 61.7% (229)
Poor 15.4% (57)
Genesee County's Poor-condition bridges carry 550,598 vehicle crossings a day
That is 10.5% of the county's reported daily bridge traffic on 14.4% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 10,389 crossings a day against 7,056 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 367 of 371 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.
67.7% of Genesee County's bridges have passed the 50-year mark
251 of the 371 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 22.9% 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 11.5% of the county's Poor-condition bridge traffic
I-475 over GILKEY CREEK, built 1976, carries 63,400 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 57-bridge count understates how much of the daily burden sits on a single crossing.
Share is of the 550,598 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.
When Genesee County's bridges were built
371 bridges with a recorded construction year, grouped by decade
- 1900s 1
1900–1909
1 bridges
- 1910s 4
1910–1919
4 bridges
- 1920s 32
1920–1929
32 bridges
- 1930s 29
1930–1939
29 bridges
- 1940s 3
1940–1949
3 bridges
- 1950s 43
1950–1959
43 bridges
- 1960s
1960–1969
62 bridges
- 1970s
1970–1979
116 bridges
- 1980s 16
1980–1989
16 bridges
- 1990s 14
1990–1999
14 bridges
- 2000s 26
2000–2009
26 bridges
- 2010s 17
2010–2019
17 bridges
- 2020s 8
2020–2029
8 bridges
What this shows Construction peaked in the 1970s, when 116 of the county's bridges still in the inventory were built, which is 31.3% of those with a recorded year. That cohort is now 45 to 54 years old in the 2024 inventory. Its average build year is 1968, 8 years older than the Michigan average of 1976.
How Genesee County compares with Michigan's closest counties by inventory size
The 5 Michigan counties nearest Genesee County in number of bridges, with their condition splits. Its 15.4% Poor share is the 4th-lowest of these 6. Its average build year of 1968 against a peer-group mean of 1979 is 11 years older.
Showing the 5 closest of 82 Michigan counties eligible for comparison.
| County | Bridges | Good | Fair | Poor | Avg. built |
|---|---|---|---|---|---|
| Macomb County | 417 | 42.7% | 49.6% | 7.7% | 1980 |
| Genesee County (this page) | 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 |
| Monroe County | 297 | 30% | 54.5% | 15.5% | 1974 |
| Berrien County | 272 | 27.6% | 66.5% | 5.9% | 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 Genesee 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 Genesee County, both outside Michigan so the neighborhoods are not the same-state size table above.
Similar inventory size
Nearest county inventories outside MI (371 bridges here).
- Lee County, IL · 371 bridges
- Carroll County, MO · 371 bridges
- Fayette County, TX · 371 bridges
- Clinton County, IA · 372 bridges
Similar average build year
Nearest mean year-built outside MI (1968 here).
- Montgomery County, PA · avg 1968 · 828 bridges
- San Joaquin County, CA · avg 1968 · 644 bridges
- Providence County, RI · avg 1968 · 476 bridges
- Imperial County, CA · avg 1968 · 444 bridges
Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.
All bridges (371)
M-21
PoorOver: CSX RR (ABN)
IN FLINT, Genesee, MI
Built 1918 Load: 39.2 t ADT: 15,341
I-475 SB
PoorOver: I-75 NB
4.5 MI S OF FLINT, Genesee, MI
Built 1971 Load: 40.2 t ADT: 13,158
I-75 RAMP C
PoorOver: I-75
SB I-75 RAMP TO EB I-69, Genesee, MI
Built 1969 Load: 40.5 t ADT: 4,800
HENDERSON ROAD
PoorOver: KEARSLEY CREEK
3000 FT SOUTH OF GREEN RD, Genesee, MI
Built 1937 Load: 41.5 t ADT: 215
M-54
PoorOver: THREAD CREEK
IN FLINT (1.4MI S OF COUR, Genesee, MI
Built 1976 Load: 42.1 t ADT: 20,772
I-475 RAMP B
PoorOver: I-75
N JCT I-75, Genesee, MI
Built 1971 Load: 42.1 t ADT: 11,989
I-75 TO I-69 RMP B
PoorOver: GTW RR &I-75
NB I-75 RMP TO WB I-69, Genesee, MI
Built 1969 Load: 42.8 t ADT: 9,590
I-69 EB
PoorOver: LINDEN RD
2.0 MI SW OF FLINT, Genesee, MI
Built 1968 Load: 43.4 t ADT: 19,829
HEMPHILL RD
PoorOver: I-475
@ S FLINT CITY LTS, Genesee, MI
Built 1971 Load: 43.7 t ADT: 15,000
I-69 WB
PoorOver: LINDEN RD
2.0 MI E OF SWARTZ CREEK, Genesee, MI
Built 1968 Load: 44.4 t ADT: 19,829
TORREY RD
PoorOver: US-23
6.3 MI N OF FENTON, Genesee, MI
Built 1957 Load: 45.0 t ADT: 5,326
I-475
PoorOver: DAVISON - BROADWAY AVES
IN FLINT, Genesee, MI
Built 1976 Load: 45.0 t ADT: 63,400
COLDWATER RD
PoorOver: I-75
6.1 MI S OF M-57, Genesee, MI
Built 1957 Load: 46.0 t ADT: 3,308
I-475
PoorOver: CSX RR & NB SERV RD(ABN)
IN FLINT, Genesee, MI
Built 1971 Load: 46.7 t ADT: 59,000
I-69 WB RAMPS H&F
PoorOver: BALLENGER RD
WB I-69 RAMP TO I-75, Genesee, MI
Built 1969 Load: 48.3 t ADT: 4,900
LEITH STREET
PoorOver: W BOULEVARD; FLINT RIVER
IN FLINT, Genesee, MI
Built 1967 Load: 48.9 t ADT: 1,084
I-475 AND RAMP B
PoorOver: CHAVEZ DR
IN FLINT, Genesee, MI
Built 1976 Load: 54.4 t ADT: 63,400
ROBERT T LONGWAY
PoorOver: GILKEY CREEK
IN CITY OF FLINT, Genesee, MI
Built 1954 Load: 56.4 t ADT: 12,809
FRANKLIN AVENUE
PoorOver: GILKEY CREEK
IN FLINT, Genesee, MI
Built 1989 Load: 56.4 t
I-475
PoorOver: GILKEY CREEK
S OF STEVER RD, Genesee, MI
Built 1976 Load: 59.6 t ADT: 63,400
MCKINLEY ROAD
PoorOver: BRENT RUN
BET VIENNA & FARRAND ROAD, Genesee, MI
Built 1929 Load: 77.1 t ADT: 701
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.