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.

Total bridges

192

Public highway bridges in Huron County

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

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).

Source FHWA National Bridge Inventory (year built) As of 2024 NBI release

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.

Bridge inventory size and condition shares for Huron County and the 5 Michigan counties closest to it in inventory size
County Bridges Poor
Clinton County 216 15.7%
Calhoun County 213 18.3%
Eaton County 200 6.5%
Huron County (this page) 192 6.3%
Isabella County 183 13.1%
Sanilac County 171 9.9%

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).

Similar average build year

Nearest mean year-built outside MI (1976 here).

Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.

All 192 Good 61 Fair 119 Poor 12

Good-condition bridges (61)

BAYPORT ROAD

Good

Over: SHEBEON DRAIN

SEC. 30 WINSOR TWP., Huron, MI

Built 1980 Load: 16.8 t ADT: 830

EBY ROAD

Good

Over: PINNEBOG RIVER

SEC. 15 OLIVER TWP., Huron, MI

Built 1958 Load: 23.0 t ADT: 50

WITHERSPOON ROAD

Good

Over: TAFT DRAIN

SEC 17-20 HUME TWP, Huron, MI

Built 1981 Load: 23.3 t ADT: 12

EPPENBROCK ROAD

Good

Over: ROCK FALLS CREEK

SEC. 28-29 SAND BEACH TWP, Huron, MI

Built 1978 Load: 25.6 t ADT: 130

STEIN ROAD

Good

Over: PINNEBOG RIVER

SEC. 30-31 COLFAX TWP., Huron, MI

Built 1977 Load: 25.9 t ADT: 150

SOULETOWN ROAD

Good

Over: E BR PINNEBOG RIVER

SEC. 24 CHANDLER TWP., Huron, MI

Built 1999 Load: 27.2 t ADT: 110

FILION ROAD

Good

Over: PHILP DRAIN

SEC. 18-19 BLOOMFIELD TWP, Huron, MI

Built 1969 Load: 28.2 t ADT: 640

RESCUE ROAD

Good

Over: SHEBEON DRAIN

SEC15-22 BROOKFIELD TWP, Huron, MI

Built 1993 Load: 28.2 t ADT: 130

LANGE ROAD

Good

Over: COLUMBIA DRAIN

SEC 9-10 SEBEWAING TWP, Huron, MI

Built 1927 Load: 28.2 t ADT: 440

KINDE ROAD

Good

Over: WILLOW RIVER

SEC. 32 HURON TWP., Huron, MI

Built 1999 Load: 32.1 t ADT: 675

BACH ROAD

Good

Over: STATE DRAIN

SEC 26-35 SEBEWAING TWP, Huron, MI

Built 1999 Load: 32.4 t ADT: 115

FILION ROAD

Good

Over: EAST BR WILLOW RIVER DRN

SEC 16-21 BLOOMFIELD TWP, Huron, MI

Built 2005 Load: 32.7 t ADT: 645

OAK BEACH ROAD

Good

Over: TAFT DRAIN

SEC 20-29 HUME TWP, Huron, MI

Built 2005 Load: 32.7 t ADT: 390

SWAZYE ROAD

Good

Over: EAST BR WILLOW RIVER DRN

SEC 21-28 BLOOMFIELD TWP, Huron, MI

Built 1994 Load: 32.7 t ADT: 52

RICHARDSON ROAD

Good

Over: PINNEBOG RIVER

SEC. 3-10 OLIVER TWP., Huron, MI

Built 1988 Load: 34.3 t ADT: 435

SCHOCK ROAD

Good

Over: ELM CREEK

SEC 13-14 SHERMAN TWP, Huron, MI

Built 2014 Load: 34.3 t ADT: 232

M-142

Good

Over: PIGEON RIVER

1.0 MI W OF PIGEON, Huron, MI

Built 2011 Load: 35.0 t ADT: 4,500

UNION STREET

Good

Over: SEBEWAING RIVER I/C DR

SEBEWAING VILLAGE PARK, Huron, MI

Built 2005 Load: 35.0 t ADT: 75

STODDARD ROAD

Good

Over: BIRD CREEK DRAIN

SEC 8-17 DWIGHT TWP, Huron, MI

Built 2015 Load: 35.6 t ADT: 285

M-25

Good

Over: ROCK FALLS CREEK

2.1 MI S OF HARBOR BEACH, Huron, MI

Built 2003 Load: 36.6 t ADT: 1,957

KLUG ROAD

Good

Over: ELM CREEK

SEC. 14-15 SHERMAN TWP., Huron, MI

Built 2001 Load: 37.3 t ADT: 35

BERNE ROAD

Good

Over: BAD AXE DRAIN

SEC. 35 MEADE TWP., Huron, MI

Built 1988 Load: 37.6 t ADT: 150

M-142

Good

Over: PINNEBOG RIVER

0.5 MI E OF ELKTON, Huron, MI

Built 1946 Load: 38.6 t ADT: 5,274

RISKEY ROAD

Good

Over: COLUMBIA DRAIN

SEC. 29-30 BROOKFIELD TWP, Huron, MI

Built 2007 Load: 38.6 t ADT: 85

FINKLE ROAD

Good

Over: ALLEN DRAIN

SEC. 30 SAND BEACH TWP., Huron, MI

Built 1998 Load: 39.9 t ADT: 250

CANBORO ROAD

Good

Over: EAST BR. PIGEON RIVER

SEC. 3-10 GRANT TWP., Huron, MI

Built 2008 Load: 40.4 t ADT: 125

PUWALOWSKI ROAD

Good

Over: ALLEN DRAIN

SEC 25-36 SIGEL TWP, Huron, MI

Built 1997 Load: 41.4 t ADT: 20

MINDEN ROAD

Good

Over: ALLEN DRAIN

SEC. 35-36 SIGEL TWP., Huron, MI

Built 1997 Load: 41.4 t ADT: 135

RUPPEL ROAD

Good

Over: OCHA CREEK

SEC. 15 RUBICON TWP., Huron, MI

Built 2003 Load: 41.5 t ADT: 85

ANTON STREET

Good

Over: SEBEWAING RIVER

0.4 MI E OF M-25, Huron, MI

Built 2013 Load: 41.5 t ADT: 5,590

M-25

Good

Over: WHITE RIVER

1.4 MI N OF WHITE ROCK, Huron, MI

Built 2010 Load: 42.4 t ADT: 840

HURON LINE ROAD

Good

Over: BROOKFIELD DRAIN

SEC 33 BROOKFIELD TWP, Huron, MI

Built 2008 Load: 42.4 t ADT: 70

FILION ROAD

Good

Over: TAFT DRAIN

SEC. 15-22 MEADE TWP., Huron, MI

Built 1995 Load: 42.5 t ADT: 930

RUTH ROAD

Good

Over: ROCK FALLS CREEK

SEC. 29-30 SAND BEACH TWP, Huron, MI

Built 1925 Load: 42.6 t ADT: 1,030

M-25

Good

Over: ELM CREEK

2.2 MI N OF WHITE ROCK, Huron, MI

Built 2003 Load: 43.1 t ADT: 821

OESCHGER ROAD

Good

Over: SHEBEON DRAIN

SEC. 6 BROOKFIELD TWP., Huron, MI

Built 1996 Load: 43.4 t ADT: 20

RISKEY ROAD

Good

Over: SHEBEON DRAIN

SEC 5-6 BROOKFIELD TWP, Huron, MI

Built 1996 Load: 43.4 t ADT: 50

MOORE ROAD

Good

Over: PINNEBOG RIVER

SEC. 23-24 OLIVER TWP., Huron, MI

Built 1985 Load: 45.3 t ADT: 75

CASEVILLE ROAD

Good

Over: PIGEON RIVER

SEC. 26-27 MCKINLEY TWP., Huron, MI

Built 2023 Load: 46.3 t ADT: 2,720

MINNICK ROAD

Good

Over: E BR WILLOW CREEK

SEC. 28-33 BLOOMFIELD TWP, Huron, MI

Built 2005 Load: 47.0 t ADT: 70

M-25

Good

Over: PIGEON RIVER

IN CASEVILLE, Huron, MI

Built 1929 Load: 48.6 t ADT: 4,865

PARISVILLE ROAD

Good

Over: ALLEN DRAIN

SEC. 34-35 SIGEL TWP., Huron, MI

Built 1997 Load: 48.9 t ADT: 685

RESCUE ROAD

Good

Over: EAST BR PIGEON RIVER

SEC 13-24 GRANT TWP, Huron, MI

Built 2010 Load: 48.9 t ADT: 50

RAPSON ROAD

Good

Over: EAST BR WILLOW RIVER DN

SEC 33 BLOOMFIELD TWP, Huron, MI

Built 2020 Load: 50.2 t ADT: 68

UNION STREET

Good

Over: NORTH BRANCH CASS RIVER

0.1 MILE EAST OF M-19, Huron, MI

Built 2003 Load: 51.8 t ADT: 345

ELKTON ROAD

Good

Over: EAST BR. PIGEON RIVER

SEC. 3-4 GRANT TWP., Huron, MI

Built 1920 Load: 52.1 t ADT: 1,750

RESCUE ROAD

Good

Over: STATE DRAIN

SEC. 16-21 SEBEWAING TWP., Huron, MI

Built 1925 Load: 52.5 t ADT: 134

M-25

Good

Over: HARBOR BEACH CREEK

3.4 MI N OF M-142, Huron, MI

Built 2012 Load: 52.5 t ADT: 1,313

MOELLER ROAD

Good

Over: NEW RIVER

SEC. 29-32 HURON TWP., Huron, MI

Built 2020 Load: 52.8 t ADT: 80

SEBEWAING ROAD

Good

Over: PIGEON RIVER

SEC 11-14 GRANT TWP, Huron, MI

Built 2005 Load: 53.5 t ADT: 2,860

Read our methodology - how this data is sourced, computed, and verified.

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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.