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.
All bridges (192)
MCMILLAN ROAD
FairOver: BAD AXE DRAIN
SEC. 27-28 MEADE TWP., Huron, MI
Built 1986 Load: 50.6 t ADT: 120
GRASSMERE ROAD
FairOver: EAST BR. PIGEON RIVER
SEC. 19 SHERIDAN TWP., Huron, MI
Built 2003 Load: 51.2 t ADT: 20
BUHL ROAD
FairOver: ELM CREEK
SEC. 15-16 SHERMAN TWP., Huron, MI
Built 1975 Load: 51.3 t ADT: 110
IVANHOE ROAD
FairOver: EAST BR. PIGEON RIVER
SEC. 28-29 SHERIDAN TWP., Huron, MI
Built 1991 Load: 53.5 t ADT: 50
STODDARD ROAD
FairOver: TINSEY DRAIN
SEC. 9-16 HURON TWP., Huron, MI
Built 1940 Load: 53.8 t ADT: 250
KINDE ROAD
FairOver: LINCOLN DRAIN
SEC 36 DWIGHT TWP, Huron, MI
Built 2014 Load: 54.8 t ADT: 671
VOLZ ROAD
FairOver: COLUMBIA DRAIN
SEC. 13-14 SEBEWAING TWP., Huron, MI
Built 1927 Load: 56.4 t ADT: 25
HAIST ROAD
FairOver: PIGEON RIVER
SEC. 24-25 WINSOR TWP, Huron, MI
Built 1987 Load: 57.3 t ADT: 150
KINDE ROAD
FairOver: TAFT DRAIN
SEC 32 HUME TWP, Huron, MI
Built 1921 Load: 57.4 t ADT: 1,520
STAFFORD ROAD
FairOver: OCHA CREEK
SEC 15-16 RUBICON TWP, Huron, MI
Built 1985 Load: 57.6 t ADT: 52
GEIGER ROAD
FairOver: PINNEBOG RIVER
SEC. 14-23 OLIVER TWP., Huron, MI
Built 1925 Load: 57.7 t ADT: 100
BAYPORT ROAD
FairOver: COLUMBIA DRAIN
SEC. 24 SEBEWAING TWP, Huron, MI
Built 1925 Load: 58.0 t ADT: 1,280
MCALPIN ROAD
FairOver: COLUMBIA DRAIN I/C DRAIN
SEC 19-30 BROOKFIELD TWP, Huron, MI
Built 1928 Load: 58.3 t ADT: 88
CROWN ROAD
FairOver: PINNEBOG RIVER
SEC. 23-26 CHANDLER TWP., Huron, MI
Built 1920 Load: 61.5 t ADT: 50
SEBEWAING ROAD
FairOver: SEBEWAING RIVER
SEC. 8-17 SEBEWAING TWP., Huron, MI
Built 1990 Load: 62.8 t ADT: 2,260
DUNN ROAD
FairOver: PINNEBOG RIVER
SEC. 12-13 CHANDLER TWP, Huron, MI
Built 1970 Load: 74.7 t ADT: 60
KLUG ROAD
FairOver: ROCK FALLS CREEK
SEC. 22-23 SAND BEACH TWP, Huron, MI
Built 1971 Load: 84.4 t ADT: 50
STODDARD ROAD
FairOver: NEW RIVER
SEC. 7-18 HURON TWP., Huron, MI
Built 1969 Load: 97.2 t ADT: 205
EDWARDS ROAD
FairOver: ELM CREEK
SEC. 13-18 SHERMAN TWP., Huron, MI
Built 1982 Load: 97.2 t ADT: 65
BAYPORT ROAD
GoodOver: SHEBEON DRAIN
SEC. 30 WINSOR TWP., Huron, MI
Built 1980 Load: 16.8 t ADT: 830
EBY ROAD
GoodOver: PINNEBOG RIVER
SEC. 15 OLIVER TWP., Huron, MI
Built 1958 Load: 23.0 t ADT: 50
WITHERSPOON ROAD
GoodOver: TAFT DRAIN
SEC 17-20 HUME TWP, Huron, MI
Built 1981 Load: 23.3 t ADT: 12
EPPENBROCK ROAD
GoodOver: ROCK FALLS CREEK
SEC. 28-29 SAND BEACH TWP, Huron, MI
Built 1978 Load: 25.6 t ADT: 130
STEIN ROAD
GoodOver: PINNEBOG RIVER
SEC. 30-31 COLFAX TWP., Huron, MI
Built 1977 Load: 25.9 t ADT: 150
SOULETOWN ROAD
GoodOver: E BR PINNEBOG RIVER
SEC. 24 CHANDLER TWP., Huron, MI
Built 1999 Load: 27.2 t ADT: 110
FILION ROAD
GoodOver: PHILP DRAIN
SEC. 18-19 BLOOMFIELD TWP, Huron, MI
Built 1969 Load: 28.2 t ADT: 640
RESCUE ROAD
GoodOver: SHEBEON DRAIN
SEC15-22 BROOKFIELD TWP, Huron, MI
Built 1993 Load: 28.2 t ADT: 130
LANGE ROAD
GoodOver: COLUMBIA DRAIN
SEC 9-10 SEBEWAING TWP, Huron, MI
Built 1927 Load: 28.2 t ADT: 440
KINDE ROAD
GoodOver: WILLOW RIVER
SEC. 32 HURON TWP., Huron, MI
Built 1999 Load: 32.1 t ADT: 675
BACH ROAD
GoodOver: STATE DRAIN
SEC 26-35 SEBEWAING TWP, Huron, MI
Built 1999 Load: 32.4 t ADT: 115
FILION ROAD
GoodOver: EAST BR WILLOW RIVER DRN
SEC 16-21 BLOOMFIELD TWP, Huron, MI
Built 2005 Load: 32.7 t ADT: 645
OAK BEACH ROAD
GoodOver: TAFT DRAIN
SEC 20-29 HUME TWP, Huron, MI
Built 2005 Load: 32.7 t ADT: 390
SWAZYE ROAD
GoodOver: EAST BR WILLOW RIVER DRN
SEC 21-28 BLOOMFIELD TWP, Huron, MI
Built 1994 Load: 32.7 t ADT: 52
RICHARDSON ROAD
GoodOver: PINNEBOG RIVER
SEC. 3-10 OLIVER TWP., Huron, MI
Built 1988 Load: 34.3 t ADT: 435
SCHOCK ROAD
GoodOver: ELM CREEK
SEC 13-14 SHERMAN TWP, Huron, MI
Built 2014 Load: 34.3 t ADT: 232
M-142
GoodOver: PIGEON RIVER
1.0 MI W OF PIGEON, Huron, MI
Built 2011 Load: 35.0 t ADT: 4,500
UNION STREET
GoodOver: SEBEWAING RIVER I/C DR
SEBEWAING VILLAGE PARK, Huron, MI
Built 2005 Load: 35.0 t ADT: 75
STODDARD ROAD
GoodOver: BIRD CREEK DRAIN
SEC 8-17 DWIGHT TWP, Huron, MI
Built 2015 Load: 35.6 t ADT: 285
M-25
GoodOver: ROCK FALLS CREEK
2.1 MI S OF HARBOR BEACH, Huron, MI
Built 2003 Load: 36.6 t ADT: 1,957
KLUG ROAD
GoodOver: ELM CREEK
SEC. 14-15 SHERMAN TWP., Huron, MI
Built 2001 Load: 37.3 t ADT: 35
BERNE ROAD
GoodOver: BAD AXE DRAIN
SEC. 35 MEADE TWP., Huron, MI
Built 1988 Load: 37.6 t ADT: 150
M-142
GoodOver: PINNEBOG RIVER
0.5 MI E OF ELKTON, Huron, MI
Built 1946 Load: 38.6 t ADT: 5,274
RISKEY ROAD
GoodOver: COLUMBIA DRAIN
SEC. 29-30 BROOKFIELD TWP, Huron, MI
Built 2007 Load: 38.6 t ADT: 85
FINKLE ROAD
GoodOver: ALLEN DRAIN
SEC. 30 SAND BEACH TWP., Huron, MI
Built 1998 Load: 39.9 t ADT: 250
CANBORO ROAD
GoodOver: EAST BR. PIGEON RIVER
SEC. 3-10 GRANT TWP., Huron, MI
Built 2008 Load: 40.4 t ADT: 125
PUWALOWSKI ROAD
GoodOver: ALLEN DRAIN
SEC 25-36 SIGEL TWP, Huron, MI
Built 1997 Load: 41.4 t ADT: 20
MINDEN ROAD
GoodOver: ALLEN DRAIN
SEC. 35-36 SIGEL TWP., Huron, MI
Built 1997 Load: 41.4 t ADT: 135
RUPPEL ROAD
GoodOver: OCHA CREEK
SEC. 15 RUBICON TWP., Huron, MI
Built 2003 Load: 41.5 t ADT: 85
ANTON STREET
GoodOver: SEBEWAING RIVER
0.4 MI E OF M-25, Huron, MI
Built 2013 Load: 41.5 t ADT: 5,590
M-25
GoodOver: WHITE RIVER
1.4 MI N OF WHITE ROCK, Huron, MI
Built 2010 Load: 42.4 t ADT: 840
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.