County profile · official public datasets

Huron County, OH

311 public highway bridges tracked in the FHWA National Bridge Inventory: 58.2% rated Good, 33.8% Fair, 8% Poor.

311
Public bridges: 58.2%
Good condition: 8%
Poor condition

The verdict

According to the Federal Highway Administration's 2024 National Bridge Inventory.

Huron County pairs a higher-than-median Poor-condition share among rated counties in the state with a newer average build year than the state inventory.

70th
of 88 on Poor share: 8%
Poor-condition share: 311
public highway bridges: 1982
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 #70 of 88 Ohio counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 8%). Huron County, Ohio contains 311 public highway bridges. Roughly 58.2% are rated “Good,” 33.8% “Fair,” and 8% “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

311

Public highway bridges in Huron County

Good condition

58.2%

181 of 311 rated 7-9

Fair condition

33.8%

105 of 311 rated 5-6

Poor condition

25 of 311 rated 4 or below

In-state Poor-share rank

#70 of 88

Among Ohio counties with 5+ bridges, lower share ranks better

Condition distribution

Share of 311 NBI-tracked bridges by lowest applicable component rating.

Good

58.2% (181)

Fair

33.8% (105)

Poor

8% (25)

Huron County's Poor-condition bridges carry 12,797 vehicle crossings a day

That is 2.9% of the county's reported daily bridge traffic on 8% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 512 crossings a day against 1,377 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 311 of 311 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.

37.9% of Huron County's bridges have passed the 50-year mark

118 of the 311 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 58.2% 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 21.9% of the county's Poor-condition bridge traffic

BASELINE RD CR 11 over BASELINE / ASHLAND RAIL, built 1950, carries 2,803 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 25-bridge count understates how much of the daily burden sits on a single crossing.

Share is of the 12,797 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.

pre-1900

1
1900s

5
1910s

1
1920s

4
1930s

11
1940s

10
1950s

27
1960s

47
1970s

24
1980s

19
1990s

66
2000s

59
2010s

29
2020s

8

What this shows Construction peaked in the 1990s, when 66 of the county's bridges still in the inventory were built, which is 21.2% of those with a recorded year. That cohort is now 25 to 34 years old in the 2024 inventory. Its average build year is 1982, 5 years newer than the Ohio average of 1977.

How Huron County compares with Ohio's closest counties by inventory size

The 5 Ohio counties nearest Huron County in number of bridges, with their condition splits. Its 8% Poor share is the 6th-lowest of these 6. Its average build year of 1982 against a peer-group mean of 1979 is in line with the group.

Showing the 5 closest of 87 Ohio counties eligible for comparison.

Bridge inventory size and condition shares for Huron County and the 5 Ohio counties closest to it in inventory size
County	Bridges	Good	Fair	Poor	Avg. built
Van Wert County	317	89%	11%	0%	1982
Miami County	315	72.1%	21%	7%	1983
Huron County (this page)	311	58.2%	33.8%	8%	1982
Belmont County	310	52.3%	42.6%	5.2%	1982
Athens County	309	54%	39.2%	6.8%	1975
Washington County	309	61.2%	32.4%	6.5%	1974

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 Ohio so the neighborhoods are not the same-state size table above.

Similar inventory size

Nearest county inventories outside OH (311 bridges here).

Boulder County, CO · 311 bridges
Madison County, MS · 311 bridges
Bronx County, NY · 311 bridges
Saline County, NE · 312 bridges

Similar average build year

Nearest mean year-built outside OH (1982 here).

Oklahoma County, OK · avg 1982 · 1,216 bridges
Jackson County, MO · avg 1982 · 930 bridges
Milwaukee County, WI · avg 1982 · 893 bridges
Champaign County, IL · avg 1982 · 727 bridges

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

All 311 Good 181 Fair 105 Poor 25

All bridges (311)

Sort:

Huron County Bridge Snapshot

Condition distribution

Huron County's Poor-condition bridges carry 12,797 vehicle crossings a day

37.9% of Huron County's bridges have passed the 50-year mark

One structure carries 21.9% of the county's Poor-condition bridge traffic

How Huron County compares with Ohio's closest counties by inventory size

Nationwide counties with similar inventory size or average build year

Similar inventory size

Similar average build year

All bridges (311)

TOWNLINE 131

REMELLE 127

BIGHAM 85

OLIVE 135

KLEIN 226

SR 99

SR 162

SR 61

SR 60

HANVILLE CRNRS 100

SR 162

WEST COLLINS 57

COUNTY LINE 10

USR 20 & SR 18

SR 303

SECTION LINE 117

LAYLIN 152

CHENANGO 183

SR 99

SR 103

SR 61

SR 18

OLD STATE 52

FERRY 146

WALNUT 112

CHENANGO 183

OLD STATE ROAD

SR 598

SR 61

USR 20 & SR 18

SR 13

SR 18

SR 18

USR 20 & SR 18

SR 61

USR 250

OPPERMAN 025

RIVER 116

LAMEREAUX 118

TIGER 159

GRNWCH MLN TL 51

EATON 191

ZEN 221

JENNIFER 194

GRNWCH MILAN TL 51

BUTLER 63

BASELINE 14

CODER 86

BUCKINGHAM 181

PLYMOUTH EAST 107

Related