Total bridges
192
Public highway bridges in Huron County
County profile · official public datasets
Huron County, MI
192 public highway bridges tracked in the FHWA National Bridge Inventory: 31.8% rated Good, 62% Fair, 6.3% Poor.
- 192
- Public bridges
- 31.8%
- Good condition
- 6.3%
- Poor condition
The verdict
According to the Federal Highway Administration's 2024 National Bridge Inventory.
Huron County posts a top-quartile lowest Poor-condition share among rated counties in the state across mid-size county bridge inventory.
- Top 20%
- lowest Poor share in state
- 6.3%
- Poor-condition share
- 192
- public highway bridges
- 1976
- 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.
Huron County Bridge Snapshot
According to the Federal Highway Administration's 2024 National Bridge Inventory, Huron County ranks #17 of 83 Michigan counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 6.3%). Huron County, Michigan contains 192 public highway bridges. Roughly 31.8% are rated “Good,” 62% “Fair,” and 6.3% “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
31.8%
61 of 192 rated 7-9
Fair condition
62%
119 of 192 rated 5-6
Poor condition
6.3%
12 of 192 rated 4 or below
In-state Poor-share rank
#17 of 83
Among Michigan counties with 5+ bridges, lower share ranks better
Condition distribution
Share of 192 NBI-tracked bridges by lowest applicable component rating.
Good 31.8% (61)
Fair 62% (119)
Poor 6.3% (12)
Huron County's Poor-condition bridges carry 7,069 vehicle crossings a day
That is 5.2% of the county's reported daily bridge traffic on 6.3% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 589 crossings a day against 899 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 192 of 192 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.
34.4% of Huron County's bridges have passed the 50-year mark
66 of the 192 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 31.8% 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 28.8% of the county's Poor-condition bridge traffic
CASEVILLE ROAD over PIGEON RIVER, built 1995, carries 2,035 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 12-bridge count understates how much of the daily burden sits on a single crossing.
Share is of the 7,069 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.
When Huron County's bridges were built
192 bridges with a recorded construction year, grouped by decade
- 1910s 3
1910–1919
3 bridges
- 1920s
1920–1929
28 bridges
- 1930s 6
1930–1939
6 bridges
- 1940s 8
1940–1949
8 bridges
- 1950s 4
1950–1959
4 bridges
- 1960s 5
1960–1969
5 bridges
- 1970s
1970–1979
24 bridges
- 1980s
1980–1989
27 bridges
- 1990s
1990–1999
44 bridges
- 2000s
2000–2009
26 bridges
- 2010s 14
2010–2019
14 bridges
- 2020s 3
2020–2029
3 bridges
What this shows Construction peaked in the 1990s, when 44 of the county's bridges still in the inventory were built, which is 22.9% of those with a recorded year. That cohort is now 25 to 34 years old in the 2024 inventory. Its average build year (1976) matches the Michigan average (1976).
How Huron County compares with Michigan's closest counties by inventory size
The 5 Michigan counties nearest Huron County in number of bridges, with their condition splits. Its 6.3% Poor share is the 1st-lowest of these 6. Its average build year of 1976 against a peer-group mean of 1977 is in line with the group.
Showing the 5 closest of 82 Michigan counties eligible for comparison.
| County | Bridges | Good | Fair | Poor | Avg. built |
|---|---|---|---|---|---|
| Clinton County | 216 | 14.8% | 69.4% | 15.7% | 1975 |
| Calhoun County | 213 | 18.3% | 63.4% | 18.3% | 1971 |
| Eaton County | 200 | 30% | 63.5% | 6.5% | 1978 |
| Huron County (this page) | 192 | 31.8% | 62% | 6.3% | 1976 |
| Isabella County | 183 | 48.1% | 38.8% | 13.1% | 1983 |
| Sanilac County | 171 | 31.6% | 58.5% | 9.9% | 1978 |
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 Huron 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 Huron County, both outside Michigan so the neighborhoods are not the same-state size table above.
Similar inventory size
Nearest county inventories outside MI (192 bridges here).
- Barbour County, AL · 192 bridges
- El Dorado County, CA · 192 bridges
- Santa Cruz County, CA · 192 bridges
- Morgan County, CO · 192 bridges
Similar average build year
Nearest mean year-built outside MI (1976 here).
- Marion County, IN · avg 1976 · 958 bridges
- Mohave County, AZ · avg 1976 · 641 bridges
- Comanche County, OK · avg 1976 · 593 bridges
- Prince George's County, MD · avg 1976 · 576 bridges
Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.
Fair-condition bridges (119)
STEIN ROAD
FairOver: SHEBEON DRAIN
SEC 30-31 WINSOR TWP, Huron, MI
Built 1915 Load: 35.5 t ADT: 240
NOTTER ROAD
FairOver: PIGEON RIVER
SEC. 23-24 WINSOR TWP, Huron, MI
Built 1990 Load: 36.3 t ADT: 250
M-25
FairOver: BIRD CREEK
0.3 MI E OF M 53, Huron, MI
Built 1970 Load: 36.9 t ADT: 780
PINNEBOG ROAD
FairOver: E. BR. PINNEBOG RIVER
SEC. 19-20 MEADE TWP., Huron, MI
Built 1976 Load: 37.2 t ADT: 1,390
M-25
FairOver: SHEBEON DRAIN
2.5 MI S OF M-142, Huron, MI
Built 1949 Load: 37.3 t ADT: 2,000
M-53
FairOver: E BR PIGEON RIVER
2.0 MI N OF SANILAC COL, Huron, MI
Built 1940 Load: 37.3 t ADT: 4,658
GRASSMERE ROAD
FairOver: PINNEBOG RIVER
SEC. 25 LAKE TWP., Huron, MI
Built 1996 Load: 37.3 t ADT: 675
THOMAS ROAD
FairOver: BAD AXE DRAIN
SEC. 34-35 MEADE TWP., Huron, MI
Built 1990 Load: 37.6 t ADT: 120
RIVER STREET
FairOver: PIGEON RIVER (CUT OFF)
0.2 MI W OF M-25, Huron, MI
Built 2014 Load: 37.9 t ADT: 50
HAIST ROAD
FairOver: SHEBEON DRAIN
SEC 24-25 FAIRHAVEN TWP, Huron, MI
Built 2000 Load: 38.2 t ADT: 90
STEIN ROAD
FairOver: PIGEON RIVER
SEC 25-36 WINSOR TWP, Huron, MI
Built 1993 Load: 38.6 t ADT: 195
M-53
FairOver: PINNEBOG RIVER
6.0 MI SW OF BAD AXE, Huron, MI
Built 1994 Load: 39.2 t ADT: 3,895
FILION ROAD
FairOver: PIGEON RIVER
SEC. 13-24 MCKINLEY TWP., Huron, MI
Built 1994 Load: 39.5 t ADT: 850
LIMERICK ROAD
FairOver: PIGEON RIVER
SEC. 1-12 CASEVILLE TWP., Huron, MI
Built 1995 Load: 39.8 t ADT: 125
RESCUE ROAD
FairOver: LITTLE PIGEON RIVER
SEC. 15-22 GRANT TWP., Huron, MI
Built 1991 Load: 39.9 t ADT: 50
KINDE ROAD
FairOver: PINNEBOG RIVER
SEC.1CHANDLERTWP., Huron, MI
Built 1993 Load: 40.2 t ADT: 1,520
REDMAN ROAD
FairOver: WILLOW RIVER
SEC. 5-8 BLOOMFIELD TWP., Huron, MI
Built 1960 Load: 40.2 t ADT: 50
WEAVER ROAD
FairOver: WEAVER CUT
SEC. 17-18 HUME TWP., Huron, MI
Built 1996 Load: 40.8 t ADT: 120
MCALPIN ROAD
FairOver: STATE DRAIN
SEC 22-27 SEBEWAING TWP, Huron, MI
Built 1995 Load: 41.1 t ADT: 75
M-19
FairOver: CASS RIVER
1.4 MI N OF SANILAC COL, Huron, MI
Built 1957 Load: 41.5 t ADT: 3,478
MCGARDLE ROAD
FairOver: NEW RIVER
SEC. 6-7 HURON TWP., Huron, MI
Built 1984 Load: 41.6 t ADT: 30
M-25
FairOver: SCHRAM DRAIN
5.6 MI SW OF PORT AUSTIN, Huron, MI
Built 1975 Load: 41.8 t ADT: 1,500
CROCKARD ROAD
FairOver: BIRD CREEK DRAIN
SEC 7-8 DWIGHT TWP, Huron, MI
Built 1983 Load: 42.2 t ADT: 120
DAY ROAD
FairOver: NEW RIVER
SEC. 30 HURON TWP., Huron, MI
Built 1981 Load: 42.3 t ADT: 30
M-25
FairOver: PINNEBOG RIVER
6.0 MI SW OF PORT AUSTIN, Huron, MI
Built 1976 Load: 42.4 t ADT: 1,500
SEBEWAING ROAD
FairOver: COLUMBIA DRAIN
SEC. 11-14 SEBEWAING TWP., Huron, MI
Built 1990 Load: 42.4 t ADT: 2,100
SCHOCK ROAD
FairOver: ROCK FALLS CREEK
SEC. 23-24 SAND BEACH TWP, Huron, MI
Built 1974 Load: 42.7 t ADT: 870
WEAVER ROAD
FairOver: PINNEBOG RIVER
SEC. 18 HUME TWP., Huron, MI
Built 1981 Load: 42.9 t ADT: 90
EPPENBROCK ROAD
FairOver: ELM CREEK DRAIN
SEC. 16-17 SHERMAN TWP., Huron, MI
Built 1979 Load: 43.0 t ADT: 125
HURON CITY ROAD
FairOver: EAST BR. WILLOW RIVER
SEC. 8-17 BLOOMFIELD TWP, Huron, MI
Built 2004 Load: 43.1 t ADT: 100
LAWITZKE ROAD
FairOver: TINSEY DRAIN
SEC. 15-22 HURON TWP., Huron, MI
Built 1973 Load: 43.3 t ADT: 120
CANBORO ROAD
FairOver: SHEBEON DRAIN
SEC. 5-8 BROOKFIELD TWP., Huron, MI
Built 1996 Load: 43.4 t ADT: 200
SECTION LINE ROAD
FairOver: EAST BR. WILLOW DRAIN
SEC. 4-9 SIGEL TWP., Huron, MI
Built 1972 Load: 43.5 t ADT: 495
M-25
FairOver: NEW RIVER
1.6 MI W OF HURON CITY, Huron, MI
Built 1970 Load: 43.7 t ADT: 816
ISELER ROAD
FairOver: NEW RIVER
SEC. 29-30 HURON TWP., Huron, MI
Built 2002 Load: 43.7 t ADT: 30
MCDONALD ROAD
FairOver: EAST BR. WILLOW RIVER
SEC. 16-17 BLOOMFIELD TWP, Huron, MI
Built 1984 Load: 43.9 t ADT: 100
KILMANAGH ROAD
FairOver: SHEBEON DRAIN
SEC. 31 WINSOR TWP., Huron, MI
Built 1993 Load: 43.9 t ADT: 425
DUNN ROAD
FairOver: PIGEON RIVER
SEC. 12 CASEVILLE TWP., Huron, MI
Built 1980 Load: 44.9 t ADT: 130
IVANHOE ROAD
FairOver: COLONA DRAIN
SEC. 32-33 COLFAX TWP., Huron, MI
Built 1973 Load: 45.6 t ADT: 100
CENTER STREET
FairOver: SEBEWAING RIVER
0.25 MI W OF M-25, Huron, MI
Built 2003 Load: 46.0 t ADT: 4,900
FARVER ROAD
FairOver: PIGEON RIVER
SEC. 4-5 GRANT TWP., Huron, MI
Built 1994 Load: 46.4 t ADT: 50
GETTEL ROAD
FairOver: STATE DRAIN
SEC. 26-27 SEBEWAING TWP., Huron, MI
Built 2007 Load: 46.7 t ADT: 110
HUNTER ROAD
FairOver: E BR BIRD CREEK DR
SEC. 31 PORT AUSTIN TWP., Huron, MI
Built 1978 Load: 47.2 t ADT: 180
GEIGER ROAD
FairOver: PIGEON RIVER
SEC. 14-23 WINSOR TWP., Huron, MI
Built 1982 Load: 47.5 t ADT: 250
KINDE ROAD
FairOver: MOORE CREEK
SEC. 34 HUME TWP., Huron, MI
Built 1921 Load: 47.6 t ADT: 1,500
LANGE ROAD
FairOver: STATE DRAIN
SEC. 21-22 SEBEWAING TWP., Huron, MI
Built 1925 Load: 48.3 t ADT: 410
ELKTON ROAD
FairOver: ELKTON DRAIN
SEC. 9-10 OLIVER TWP., Huron, MI
Built 1988 Load: 48.9 t ADT: 1,860
M-25
FairOver: SEBEWAING RIVER
IN SEBEWAING, Huron, MI
Built 1949 Load: 50.2 t ADT: 5,123
CROWN ROAD
FairOver: E. BR. PINNEBOG RIVER
SEC. 20-29 MEADE TWP., Huron, MI
Built 1992 Load: 50.5 t ADT: 120
CAMPBELL ROAD
FairOver: E BR PINNEBOG RIVER
SEC. 27-34 MEADE TWP., Huron, MI
Built 1979 Load: 50.6 t ADT: 120
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.