County profile · official public datasets

Wyandot County, OH

236 public highway bridges tracked in the FHWA National Bridge Inventory: 71.2% rated Good, 27.1% Fair, 1.7% Poor.

236
Public bridges: 71.2%
Good condition: 1.7%
Poor condition

The verdict

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

Wyandot County pairs a top-quartile lowest Poor-condition share among rated counties in the state with a newer average build year than the state inventory.

Top 18%
lowest Poor share in state: 1.7%
Poor-condition share: 236
public highway bridges: 1984
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.

Wyandot County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Wyandot County ranks #16 of 88 Ohio counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 1.7%). Wyandot County, Ohio contains 236 public highway bridges. Roughly 71.2% are rated “Good,” 27.1% “Fair,” and 1.7% “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

236

Public highway bridges in Wyandot County

Good condition

71.2%

168 of 236 rated 7-9

Fair condition

27.1%

64 of 236 rated 5-6

Poor condition

1.7%

4 of 236 rated 4 or below

In-state Poor-share rank

#16 of 88

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

Condition distribution

Share of 236 NBI-tracked bridges by lowest applicable component rating.

Good

71.2% (168)

Fair

27.1% (64)

Poor

1.7% (4)

Wyandot County's Poor-condition bridges carry 9,076 vehicle crossings a day

That is 2.2% of the county's reported daily bridge traffic on 1.7% of its bridges: Poor-condition structures carry more traffic than their share of the inventory. Each Poor bridge averages 2,269 crossings a day against 1,891 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 236 of 236 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.

33.9% of Wyandot County's bridges have passed the 50-year mark

80 of the 236 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 71.2% 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 95.1% of the county's Poor-condition bridge traffic

USR 23 SB over HONEY RUN, built 1966, carries 8,628 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 4-bridge count understates how much of the daily burden sits on a single crossing.

Share is of the 9,076 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.

pre-1900

1
1900s

3
1910s

1
1920s

1
1940s

5
1950s

14
1960s

47
1970s

25
1980s

27
1990s

42
2000s

39
2010s

21
2020s

10

What this shows Construction peaked in the 1960s, when 47 of the county's bridges still in the inventory were built, which is 19.9% of those with a recorded year. That cohort is now 55 to 64 years old in the 2024 inventory. Its average build year is 1984, 7 years newer than the Ohio average of 1977.

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

The 5 Ohio counties nearest Wyandot County in number of bridges, with their condition splits. Its 1.7% Poor share is the 2nd-lowest of these 6. Its average build year of 1984 against a peer-group mean of 1977 is 7 years newer.

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

Bridge inventory size and condition shares for Wyandot County and the 5 Ohio counties closest to it in inventory size
County	Bridges	Good	Fair	Poor	Avg. built
Highland County	245	69.8%	28.2%	2%	1985
Williams County	242	52.5%	45%	2.5%	1974
Fayette County	241	60.2%	39%	0.8%	1979
Gallia County	237	38.4%	56.1%	5.5%	1973
Wyandot County (this page)	236	71.2%	27.1%	1.7%	1984
Marion County	229	63.8%	34.1%	2.2%	1975

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 Wyandot 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 Wyandot County, both outside Ohio so the neighborhoods are not the same-state size table above.

Similar inventory size

Nearest county inventories outside OH (236 bridges here).

Etowah County, AL · 236 bridges
York County, ME · 236 bridges
Cabarrus County, NC · 236 bridges
Catawba County, NC · 236 bridges

Similar average build year

Nearest mean year-built outside OH (1984 here).

Hennepin County, MN · avg 1984 · 936 bridges
Duval County, FL · avg 1984 · 831 bridges
El Paso County, CO · avg 1984 · 686 bridges
Bell County, TX · avg 1984 · 660 bridges

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

All 236 Good 168 Fair 64 Poor 4

Good-condition bridges (168)

Sort:

Wyandot County Bridge Snapshot

Condition distribution

Wyandot County's Poor-condition bridges carry 9,076 vehicle crossings a day

33.9% of Wyandot County's bridges have passed the 50-year mark

One structure carries 95.1% of the county's Poor-condition bridge traffic

How Wyandot 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

Good-condition bridges (168)

SR 67 SR 231

CH44f

CH47g

CH330

USR 30 EXIT RAMP

TH58b

CH59b

TH122a

CH62b

USR 30 WB

USR 30 EB

SR 67

CH71a

TH108c

TH137a

TH121b

CH182

SR 231

CH44g

TH51a

TH49c

CH81a

CH4e

TH71d

CH77a

TH124d

TH124d

TH135b

CH97c

TH11b

TH136d

CH97f

USR 30 EB

USR 30 WB

SR 53

SR 199

CH47a

CH95c

TH103d

USR 30 WB

USR 30 EB

CH81b

USR 30 WB

USR 30 WB

USR 30 EB

TH29b

TH124d

SR 67

SR 231

CH93a

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