Total bridges
21
Public highway bridges in Montmorency County
County profile · official public datasets
Montmorency County, MI
21 public highway bridges tracked in the FHWA National Bridge Inventory: 57.1% rated Good, 42.9% Fair, 0% Poor.
- 21
- Public bridges
- 57.1%
- Good condition
- 0%
- Poor condition
The verdict
According to the Federal Highway Administration's 2024 National Bridge Inventory.
Montmorency County pairs a top-5% lowest Poor-condition share among rated counties in the state with a newer average build year than the state inventory.
- Top 4%
- lowest Poor share in state
- 0%
- Poor-condition share
- 21
- public highway bridges
- 1995
- 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.
Montmorency County Bridge Snapshot
According to the Federal Highway Administration's 2024 National Bridge Inventory, Montmorency County ranks #3 of 83 Michigan counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 0%). Montmorency County, Michigan contains 21 public highway bridges. Roughly 57.1% are rated “Good,” 42.9% “Fair,” and 0% “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
57.1%
12 of 21 rated 7-9
Fair condition
42.9%
9 of 21 rated 5-6
Poor condition
0%
0 of 21 rated 4 or below
In-state Poor-share rank
#3 of 83
Among Michigan counties with 5+ bridges, lower share ranks better
Condition distribution
Share of 21 NBI-tracked bridges by lowest applicable component rating.
Good 57.1% (12)
Fair 42.9% (9)
Poor 0% (0)
23.8% of Montmorency County's bridges have passed the 50-year mark
5 of the 21 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 57.1% 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.
When Montmorency County's bridges were built
21 bridges with a recorded construction year, grouped by decade
- 1920s 1
1920–1929
1 bridges
- 1950s 1
1950–1959
1 bridges
- 1960s
1960–1969
3 bridges
- 1990s
1990–1999
6 bridges
- 2000s
2000–2009
3 bridges
- 2020s
2020–2029
7 bridges
What this shows Construction peaked in the 2020s, when 7 of the county's bridges still in the inventory were built, which is 33.3% of those with a recorded year. Those records fall in the current decade of the 2024 inventory. Its average build year is 1995, 19 years newer than the Michigan average of 1976.
How Montmorency County compares with Michigan's closest counties by inventory size
The 5 Michigan counties nearest Montmorency County in number of bridges, with their condition splits. Its 0% Poor share is the 1st-lowest of these 6. Its average build year of 1995 against a peer-group mean of 1976 is 19 years newer.
Showing the 5 closest of 82 Michigan counties eligible for comparison.
| County | Bridges | Good | Fair | Poor | Avg. built |
|---|---|---|---|---|---|
| Alcona County | 27 | 48.1% | 33.3% | 18.5% | 1982 |
| Benzie County | 25 | 28% | 40% | 32% | 1969 |
| Otsego County | 25 | 16% | 76% | 8% | 1976 |
| Montmorency County (this page) | 21 | 57.1% | 42.9% | 0% | 1995 |
| Charlevoix County | 18 | 38.9% | 44.4% | 16.7% | 1973 |
| Antrim County | 15 | 46.7% | 40% | 13.3% | 1980 |
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 Montmorency 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 Montmorency County, both outside Michigan so the neighborhoods are not the same-state size table above.
Similar inventory size
Nearest county inventories outside MI (21 bridges here).
- Clay County, GA · 21 bridges
- Lewis County, ID · 21 bridges
- Stanton County, KS · 21 bridges
- Lander County, NV · 21 bridges
Similar average build year
Nearest mean year-built outside MI (1995 here).
- Williamson County, TX · avg 1995 · 1,170 bridges
- Craighead County, AR · avg 1995 · 442 bridges
- Utah County, UT · avg 1995 · 271 bridges
- DeSoto County, MS · avg 1995 · 266 bridges
Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.
Fair-condition bridges (9)
M-32
FairOver: THUNDER BAY RIVER
2.8 MI NE OF M-33, Montmorency, MI
Built 1927 Load: 31.8 t ADT: 4,572
BLUE LAKES ROAD
FairOver: E BR BLACK RIVER
SEC 22 MONTMORENCY TWP W, Montmorency, MI
Built 1994 Load: 32.4 t ADT: 50
CO ROAD 451
FairOver: N BR THUNDER BAY RIVER
SEC 1 MONTMORENCY TWP E, Montmorency, MI
Built 1994 Load: 34.0 t ADT: 2,126
M-32 BS
FairOver: THUNDER BAY RIVER
IN HILLMAN, Montmorency, MI
Built 2009 Load: 37.3 t ADT: 6,400
M-33
FairOver: THUNDER BAY CREEK
1.5 MI S OF M-32, Montmorency, MI
Built 1968 Load: 38.2 t ADT: 1,647
MORROW ROAD
FairOver: THUNDER BAY RIVER N BR
SEC 10 11 MONTMORENCY TWP, Montmorency, MI
Built 2000 Load: 39.9 t ADT: 100
HUBERT ROAD
FairOver: N BR THUNDER BAY RIVER
SEC 2-11 MONTMORENCY TWP, Montmorency, MI
Built 1994 Load: 45.7 t ADT: 150
M-32
FairOver: MILLER CREEK
2.0 MI NE OF M-33, Montmorency, MI
Built 1991 Load: 48.3 t ADT: 4,572
M-33
FairOver: GILCHRIST CREEK
5.8 MI N OF OSCODA COL, Montmorency, MI
Built 1951 Load: 54.4 t ADT: 1,647
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.