Total bridges
73
Public highway bridges in Cheboygan County
County profile · official public datasets
Cheboygan County, MI
73 public highway bridges tracked in the FHWA National Bridge Inventory: 21.9% rated Good, 58.9% Fair, 19.2% Poor.
- 73
- Public bridges
- 21.9%
- Good condition
- 19.2%
- Poor condition
The verdict
According to the Federal Highway Administration's 2024 National Bridge Inventory.
Cheboygan County posts a higher-than-median Poor-condition share among rated counties in the state across rated county bridge inventory.
- 77th
- of 83 on Poor share
- 19.2%
- Poor-condition share
- 73
- public highway bridges
- 1975
- 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.
Cheboygan County Bridge Snapshot
According to the Federal Highway Administration's 2024 National Bridge Inventory, Cheboygan County ranks #77 of 83 Michigan counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 19.2%). Cheboygan County, Michigan contains 73 public highway bridges. Roughly 21.9% are rated “Good,” 58.9% “Fair,” and 19.2% “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
21.9%
16 of 73 rated 7-9
Fair condition
58.9%
43 of 73 rated 5-6
Poor condition
19.2%
14 of 73 rated 4 or below
In-state Poor-share rank
#77 of 83
Among Michigan counties with 5+ bridges, lower share ranks better
Condition distribution
Share of 73 NBI-tracked bridges by lowest applicable component rating.
Good 21.9% (16)
Fair 58.9% (43)
Poor 19.2% (14)
Cheboygan County's Poor-condition bridges carry 21,600 vehicle crossings a day
That is 12.9% of the county's reported daily bridge traffic on 19.2% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 1,543 crossings a day against 1,090 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 73 of 73 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.
53.4% of Cheboygan County's bridges have passed the 50-year mark
39 of the 73 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 21.9% 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 36% of the county's Poor-condition bridge traffic
I-75 NB over TROWBRIDGE & D&MRR(ABN), built 1962, carries 7,777 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 14-bridge count understates how much of the daily burden sits on a single crossing.
Share is of the 21,600 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.
When Cheboygan County's bridges were built
73 bridges with a recorded construction year, grouped by decade
- 1900s 1
1900–1909
1 bridges
- 1920s 1
1920–1929
1 bridges
- 1930s 4
1930–1939
4 bridges
- 1940s 2
1940–1949
2 bridges
- 1950s 4
1950–1959
4 bridges
- 1960s
1960–1969
26 bridges
- 1970s 8
1970–1979
8 bridges
- 1980s 5
1980–1989
5 bridges
- 1990s 6
1990–1999
6 bridges
- 2000s 10
2000–2009
10 bridges
- 2010s 6
2010–2019
6 bridges
What this shows Construction peaked in the 1960s, when 26 of the county's bridges still in the inventory were built, which is 35.6% of those with a recorded year. That cohort is now 55 to 64 years old in the 2024 inventory. Its average build year (1975) matches the Michigan average (1976).
How Cheboygan County compares with Michigan's closest counties by inventory size
The 5 Michigan counties nearest Cheboygan County in number of bridges, with their condition splits. Its 19.2% Poor share is the 5th-lowest of these 6. Its average build year of 1975 against a peer-group mean of 1979 is in line with the group.
Showing the 5 closest of 82 Michigan counties eligible for comparison.
| County | Bridges | Good | Fair | Poor | Avg. built |
|---|---|---|---|---|---|
| Arenac County | 80 | 25% | 56.3% | 18.8% | 1970 |
| Mecosta County | 80 | 36.3% | 58.8% | 5% | 1982 |
| Cheboygan County (this page) | 73 | 21.9% | 58.9% | 19.2% | 1975 |
| Barry County | 69 | 26.1% | 49.3% | 24.6% | 1977 |
| Baraga County | 68 | 61.8% | 30.9% | 7.4% | 1988 |
| Mason County | 66 | 39.4% | 53% | 7.6% | 1977 |
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 Cheboygan 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 Cheboygan County, both outside Michigan so the neighborhoods are not the same-state size table above.
Similar inventory size
Nearest county inventories outside MI (73 bridges here).
- Stone County, AR · 73 bridges
- Levy County, FL · 73 bridges
- Putnam County, FL · 73 bridges
- Dade County, GA · 73 bridges
Similar average build year
Nearest mean year-built outside MI (1975 here).
- San Bernardino County, CA · avg 1975 · 1,422 bridges
- Lane County, OR · avg 1975 · 1,010 bridges
- Fulton County, GA · avg 1975 · 775 bridges
- Westmoreland County, PA · avg 1975 · 620 bridges
Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.
Good-condition bridges (16)
PIGEON RIVER ROAD
GoodOver: PIGEON RIVER
SEC.13/24 T34N R2W, Cheboygan, MI
Built 1995 Load: 13.6 t ADT: 620
SCOTT ROAD
GoodOver: STURGEON RIVER
SEC.31 T34N R2W, Cheboygan, MI
Built 2003 Load: 29.2 t ADT: 220
BLACK RIVER ROAD
GoodOver: BLACK RIVER
BET SEC 11&12 T33N R1E, Cheboygan, MI
Built 1978 Load: 33.4 t ADT: 500
STRAITS HWY(OLD 27
GoodOver: INDIAN RIVER
SEC 24 T35N R3W, Cheboygan, MI
Built 2012 Load: 34.3 t ADT: 7,047
TIN BRIDGE ROAD
GoodOver: PIGEON RIVER
SEC.28 T33N R1W, Cheboygan, MI
Built 2007 Load: 35.0 t ADT: 30
HEBRON TOWN HALL R
GoodOver: I-75
4.4 MI S OF US-31, Cheboygan, MI
Built 1960 Load: 36.6 t ADT: 40
M-27
GoodOver: MULLETT CREEK
2.2 MI N OF TOPINABEE, Cheboygan, MI
Built 2004 Load: 37.6 t ADT: 3,024
MC EACHRON ROAD
GoodOver: W BR STURGEON RIVER
WILMOT TWP SEC 16, Cheboygan, MI
Built 2008 Load: 41.5 t ADT: 180
RED BRIDGE ROAD
GoodOver: UPPER BLACK RIVER
SEC.5 T35N R1E, Cheboygan, MI
Built 1999 Load: 44.4 t ADT: 140
US-23
GoodOver: LITTLE BLACK RIVER
IN CHEBOYGAN MACKINAW ST, Cheboygan, MI
Built 2016 Load: 45.0 t ADT: 3,731
WAVELAND RD
GoodOver: MILLIGAN CREEK
500 FT N OF W BRADY RD, Cheboygan, MI
Built 2018 Load: 52.2 t ADT: 50
W BRADY RD
GoodOver: MILLIGAN CREEK
0.8 MI E OF ETHINGTON RD, Cheboygan, MI
Built 2018 Load: 52.2 t ADT: 50
SHIRE ROAD
GoodOver: W BR STURGEON RIVER
SEC.12 T33N R3W, Cheboygan, MI
Built 2005 Load: 52.8 t ADT: 144
WEBB ROAD
GoodOver: LITTLE PIGEON RIVER
SEC.1 T33N R2W, Cheboygan, MI
Built 2006 Load: 54.8 t ADT: 280
COXEY ROAD
GoodOver: PIGEON RIVER
SEC 9 T35N R2W, Cheboygan, MI
Built 2009 Load: 73.5 t ADT: 1,239
WEBB ROAD
GoodOver: PIGEON RIVER
SEC.5/8 T33N R1W, Cheboygan, MI
Built 2010 Load: 80.7 t ADT: 150
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.