Total bridges
165
Public highway bridges in Livingston County
County profile · official public datasets
Livingston County, MI
165 public highway bridges tracked in the FHWA National Bridge Inventory: 26.7% rated Good, 58.8% Fair, 14.5% Poor.
- 165
- Public bridges
- 26.7%
- Good condition
- 14.5%
- Poor condition
The verdict
According to the Federal Highway Administration's 2024 National Bridge Inventory.
Livingston County posts a higher-than-median Poor-condition share among rated counties in the state across mid-size county bridge inventory.
- 55th
- of 83 on Poor share
- 14.5%
- Poor-condition share
- 165
- public highway bridges
- 1974
- 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.
Livingston County Bridge Snapshot
According to the Federal Highway Administration's 2024 National Bridge Inventory, Livingston County ranks #55 of 83 Michigan counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 14.5%). Livingston County, Michigan contains 165 public highway bridges. Roughly 26.7% are rated “Good,” 58.8% “Fair,” and 14.5% “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
26.7%
44 of 165 rated 7-9
Fair condition
58.8%
97 of 165 rated 5-6
Poor condition
14.5%
24 of 165 rated 4 or below
In-state Poor-share rank
#55 of 83
Among Michigan counties with 5+ bridges, lower share ranks better
Condition distribution
Share of 165 NBI-tracked bridges by lowest applicable component rating.
Good 26.7% (44)
Fair 58.8% (97)
Poor 14.5% (24)
Livingston County's Poor-condition bridges carry 209,598 vehicle crossings a day
That is 10.7% of the county's reported daily bridge traffic on 14.5% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 8,733 crossings a day against 17,416 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 165 of 165 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.
56.4% of Livingston County's bridges have passed the 50-year mark
93 of the 165 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 26.7% 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 29.4% of the county's Poor-condition bridge traffic
US-23 over M-36, built 1960, carries 61,696 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 24-bridge count understates how much of the daily burden sits on a single crossing.
Share is of the 209,598 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.
When Livingston County's bridges were built
165 bridges with a recorded construction year, grouped by decade
- 1910s 2
1910–1919
2 bridges
- 1920s 7
1920–1929
7 bridges
- 1930s 9
1930–1939
9 bridges
- 1940s 7
1940–1949
7 bridges
- 1950s 17
1950–1959
17 bridges
- 1960s
1960–1969
48 bridges
- 1970s 7
1970–1979
7 bridges
- 1980s 14
1980–1989
14 bridges
- 1990s 15
1990–1999
15 bridges
- 2000s 17
2000–2009
17 bridges
- 2010s 19
2010–2019
19 bridges
- 2020s 3
2020–2029
3 bridges
What this shows Construction peaked in the 1960s, when 48 of the county's bridges still in the inventory were built, which is 29.1% of those with a recorded year. That cohort is now 55 to 64 years old in the 2024 inventory. Its average build year (1974) matches the Michigan average (1976).
How Livingston County compares with Michigan's closest counties by inventory size
The 5 Michigan counties nearest Livingston County in number of bridges, with their condition splits. Its 14.5% Poor share is the 5th-lowest of these 6. Its average build year of 1974 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 |
|---|---|---|---|---|---|
| Sanilac County | 171 | 31.6% | 58.5% | 9.9% | 1978 |
| Gratiot County | 167 | 40.7% | 47.3% | 12% | 1975 |
| Bay County | 166 | 30.1% | 53% | 16.9% | 1974 |
| Livingston County (this page) | 165 | 26.7% | 58.8% | 14.5% | 1974 |
| Lapeer County | 163 | 36.2% | 54.6% | 9.2% | 1982 |
| Shiawassee County | 163 | 45.4% | 45.4% | 9.2% | 1981 |
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 Livingston 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 Livingston County, both outside Michigan so the neighborhoods are not the same-state size table above.
Similar inventory size
Nearest county inventories outside MI (165 bridges here).
- Cleburne County, AL · 165 bridges
- Randolph County, AL · 165 bridges
- Plumas County, CA · 165 bridges
- Leon County, FL · 165 bridges
Similar average build year
Nearest mean year-built outside MI (1974 here).
- Knox County, TN · avg 1974 · 588 bridges
- Summit County, OH · avg 1974 · 563 bridges
- Onondaga County, NY · avg 1974 · 472 bridges
- Orange County, NY · avg 1974 · 472 bridges
Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.
Poor-condition bridges (24)
COHOCTAH ROAD
PoorOver: COHOCTAH-DEERFIELD DRAIN
SEC 6 DEERFIELD TWP, Livingston, MI
Built 1955 Load: 0.0 t ADT: 2,156
MARR ROAD
PoorOver: S BR SHIAWASSEE RIVER
SEC 10 HOWELL TWP, Livingston, MI
Built 1937 Load: 12.6 t ADT: 348
BOWDISH ROAD
PoorOver: UNNAMED CREEK
SEC 32 UNADILLA TWP, Livingston, MI
Built 1937 Load: 15.6 t ADT: 54
DUNHAM ROAD
PoorOver: ORE CREEK
SEC 15-22 HARTLAND TWP, Livingston, MI
Built 1923 Load: 15.9 t ADT: 730
ALLEN ROAD
PoorOver: BOGUE CREEK
SEC 35 COHOCTAH TWP, Livingston, MI
Built 1958 Load: 15.9 t ADT: 310
LANGE ROAD
PoorOver: MIDDLE BR RED CEDAR RIV
SEC 11 IOSCO TWP, Livingston, MI
Built 1922 Load: 16.5 t ADT: 200
TIPLADY ROAD
PoorOver: PORTAGE CREEK
SEC 34 PUTNAM TWP, Livingston, MI
Built 1938 Load: 17.8 t ADT: 80
FAUSSETT ROAD
PoorOver: BOGUE CREEK
SEC 36 COHOCTAH TWP, Livingston, MI
Built 1925 Load: 18.5 t ADT: 8,772
MILLET ROAD
PoorOver: RED CEDAR RIVER
SEC 30 HOWELL TWP, Livingston, MI
Built 1933 Load: 18.5 t ADT: 142
FAUSSETT ROAD
PoorOver: ORE CREEK
SEC 30 TYRONE TWP, Livingston, MI
Built 1939 Load: 19.4 t ADT: 8,772
PARSHALLVILLE ROAD
PoorOver: NORTH ORE CREEK
HARTLAND TWP SEC 6, Livingston, MI
Built 1938 Load: 22.0 t ADT: 670
FOWLERVILLE ROAD
PoorOver: RED CEDAR RIVER
SEC 22-23 HANDY TWP, Livingston, MI
Built 1961 Load: 22.7 t ADT: 4,150
MASON ROAD
PoorOver: RED CEDAR RIVER IMP. DRN
SEC 3 IOSCO TWP, Livingston, MI
Built 1990 Load: 26.2 t ADT: 5,110
FAUSSETT ROAD
PoorOver: US-23
5.0 MI N OF M-59, Livingston, MI
Built 1961 Load: 28.2 t ADT: 100
RICKETT ROAD
PoorOver: HURON RIVER
SEC 17-18 GREEN OAK TWP, Livingston, MI
Built 1973 Load: 28.8 t ADT: 5,910
MUNSELL ROAD
PoorOver: RED CEDAR RIVER IMP DRN
SEC 14 IOSCO TWP, Livingston, MI
Built 1937 Load: 29.2 t ADT: 130
JONES ROAD
PoorOver: BOGUE CREEK
SEC 24 COHOCTAH TWP, Livingston, MI
Built 1941 Load: 29.8 t ADT: 70
MCCABE ROAD
PoorOver: HURON RIVER
SEC 16 GREEN OAK TWP, Livingston, MI
Built 1930 Load: 30.5 t ADT: 300
MICHIGAN AVE
PoorOver: MDOT RR CORRIDOR
IN HOWELL, Livingston, MI
Built 1980 Load: 37.3 t ADT: 6,900
US-23
PoorOver: M-36
@ M-36, Livingston, MI
Built 1960 Load: 42.1 t ADT: 61,696
DEXTER-PINCKNEY RD
PoorOver: HONEY CREEK
SEC 26 PUTNAM TWP, Livingston, MI
Built 1985 Load: 45.0 t ADT: 8,901
I-96 WB
PoorOver: GRAND RIVER AVE
2.4 MI NW OF US-23, Livingston, MI
Built 1962 Load: 46.0 t ADT: 44,600
I-96 EB
PoorOver: GRAND RIVER AVE
2.4 MI NW OF US-23, Livingston, MI
Built 1962 Load: 47.0 t ADT: 44,600
I-96 BL (ON RMP)
PoorOver: I-96 WB
@ I-96 BL, Livingston, MI
Built 1961 Load: 50.9 t ADT: 4,897
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.