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.
Fair-condition bridges (43)
US-23
FairOver: ELLIOT CREEK
4.1 MI E OF CHEBOYGAN, Cheboygan, MI
Built 1937 Load: 15.9 t ADT: 977
BLACK RIVER ROAD
FairOver: UPPER BLACK RIVER
IN SEC 13 T34N R1E, Cheboygan, MI
Built 1962 Load: 18.8 t ADT: 860
OLD STURGEON RD
FairOver: W BR STURGEON RIVER
SEC.14/15 T33N R3W, Cheboygan, MI
Built 1994 Load: 25.9 t ADT: 240
WHITE RD (S.END)
FairOver: STURGEON RIVER
SEC.13 T34N R3W, Cheboygan, MI
Built 1992 Load: 27.9 t ADT: 270
ONAWAY RD/OLD M-68
FairOver: I-75
0.6 MI N OF M-68, Cheboygan, MI
Built 1962 Load: 28.8 t ADT: 1,050
TROWBRIDGE ROAD
FairOver: STURGEON RIVER
SEC 29 T33NR2W, Cheboygan, MI
Built 1977 Load: 28.8 t ADT: 400
LEVERING RD
FairOver: I-75
8.8 MI S OF US-31, Cheboygan, MI
Built 1960 Load: 29.2 t ADT: 1,100
TROWBRIDGE ROAD
FairOver: STURGEON RIVER
SEC 20 T33NR2W, Cheboygan, MI
Built 1977 Load: 30.5 t ADT: 410
KISSER ROAD
FairOver: MILLIGAN CREEK
SEC.1 T34N R1W, Cheboygan, MI
Built 2004 Load: 30.8 t ADT: 23
S BLACK RIVER ROAD
FairOver: COUNTY DRAIN (MUD LK DRN
WAVERLY TWP SEC 3, Cheboygan, MI
Built 1986 Load: 31.1 t ADT: 1,500
US-23
FairOver: CHEBOYGAN RIVER
IN CHEBOYGAN (STATE ST), Cheboygan, MI
Built 1940 Load: 31.4 t ADT: 7,273
INDIAN TRAIL RD
FairOver: I-75
6.8 MI N OF M-27, Cheboygan, MI
Built 1960 Load: 32.7 t ADT: 110
MULLET-BURT RD
FairOver: I-75
4.3 MI N OF M-27, Cheboygan, MI
Built 1960 Load: 33.0 t ADT: 220
M-33
FairOver: CHEBOYGAN RIVER
0.4 MI S OF M-27, Cheboygan, MI
Built 1958 Load: 33.4 t ADT: 6,873
M-68
FairOver: PIGEON RIVER
1.0 MI W OF AFTON, Cheboygan, MI
Built 1939 Load: 33.7 t ADT: 3,188
M-68
FairOver: I-75 SB
@ M-68, Cheboygan, MI
Built 1962 Load: 34.3 t ADT: 6,551
N MACKINAW HWY
FairOver: I-75
@ I-75 OLD M-108 JCT, Cheboygan, MI
Built 1959 Load: 34.3 t ADT: 2,675
I-75 NB
FairOver: D&M RR (ABN)
1.9 MI S OF M-27, Cheboygan, MI
Built 1962 Load: 34.7 t ADT: 4,474
I-75 SB
FairOver: D&M RR (ABN)
1.9 MI S OF M-27, Cheboygan, MI
Built 1962 Load: 34.7 t ADT: 4,474
WHITE RD (N. END)
FairOver: STURGEON RIVER
SEC.1 T34N R3W, Cheboygan, MI
Built 1985 Load: 35.0 t ADT: 380
POTTER RD
FairOver: I-75
0.6 MI S OF US-31, Cheboygan, MI
Built 1960 Load: 36.3 t ADT: 60
US-31 NB
FairOver: I-75
@ I-75 US-31 JCT, Cheboygan, MI
Built 1959 Load: 36.3 t ADT: 1,661
RONDO ROAD
FairOver: STURGEON RIVER
BETWEEN SEC. 24&25 T34R3W, Cheboygan, MI
Built 1979 Load: 36.9 t ADT: 640
I-75 SB
FairOver: STURGEON RIVER
2.3 MI N OF OTSEGO COL, Cheboygan, MI
Built 1962 Load: 37.3 t ADT: 7,777
I-75 NB
FairOver: STURGEON RIVER
2.3 MI N OF OTSEGO COL, Cheboygan, MI
Built 1962 Load: 37.3 t ADT: 7,777
SEFFREN RD
FairOver: ELLIOT CREEK
0.22 MI N OF US-23, Cheboygan, MI
Built 2019 Load: 38.6 t ADT: 167
M-68
FairOver: STURGEON RIVER
0.8 MI W OF I-75, Cheboygan, MI
Built 1927 Load: 39.9 t ADT: 10,873
M-68 M-33
FairOver: BLACK RIVER
E LTS OF TOWER, Cheboygan, MI
Built 2002 Load: 39.9 t ADT: 3,521
CLARK BRIDGE ROAD
FairOver: BLACK RIVER
SEC 29 T33NR1E, Cheboygan, MI
Built 1987 Load: 39.9 t ADT: 230
I-75 SB
FairOver: INDIAN RIVER
1.4 MI N OF M-68, Cheboygan, MI
Built 1962 Load: 40.2 t ADT: 4,474
RONDO RD
FairOver: I-75 SB
6.2 MI S OF M-68, Cheboygan, MI
Built 1962 Load: 40.5 t ADT: 230
RONDO RD
FairOver: I-75 NB
6.2 MI S OF M-68, Cheboygan, MI
Built 1962 Load: 40.5 t ADT: 230
BLACK RIVER ROAD
FairOver: MUD CREEK
GRANT TWP SEC 28, Cheboygan, MI
Built 1970 Load: 40.5 t ADT: 1,500
US-23
FairOver: GREENE CREEK
1.6 MI W OF PRESQUE ISLE, Cheboygan, MI
Built 1935 Load: 40.8 t ADT: 977
I-75 NB
FairOver: INDIAN RIVER
1.4 MI N OF M-68, Cheboygan, MI
Built 1962 Load: 40.8 t ADT: 4,474
RIGGSVILLE RD
FairOver: I-75
8.3 MI N OF M-27, Cheboygan, MI
Built 1960 Load: 41.5 t ADT: 900
I-75 SB
FairOver: M-27
@ M-27, Cheboygan, MI
Built 1962 Load: 42.1 t ADT: 7,777
EAST MAIN STREET
FairOver: STURGEON RIVER
IN WOLVERINE, Cheboygan, MI
Built 1987 Load: 43.4 t ADT: 800
LINCOLN AVENUE
FairOver: CHEBOYGAN RIVER
BET SECS 6T37NR1W&SEC 31, Cheboygan, MI
Built 2007 Load: 45.4 t ADT: 12,000
M-68 M-33
FairOver: MILLIGAN CREEK
3.3 MI W OF TOWER, Cheboygan, MI
Built 1958 Load: 46.3 t ADT: 3,521
I-75 NB
FairOver: M-27
@ M-27, Cheboygan, MI
Built 1962 Load: 48.3 t ADT: 7,777
M-68
FairOver: I-75 NB
@ M-68, Cheboygan, MI
Built 1962 Load: 51.2 t ADT: 6,551
BLACK RIVER ROAD
FairOver: BLACK RIVER
BETWEEN SEC 7&8 T36NR1E, Cheboygan, MI
Built 1975 Load: 62.2 t ADT: 1,100
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.