County profile · official public datasets

Auglaize County, OH

321 public highway bridges tracked in the FHWA National Bridge Inventory: 81.9% rated Good, 17.8% Fair, 0.3% Poor.

321
Public bridges: 81.9%
Good condition: 0.3%
Poor condition

The verdict

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

Auglaize County posts a top-5% lowest Poor-condition share among rated counties in the state across mid-size county bridge inventory.

Top 5%
lowest Poor share in state: 0.3%
Poor-condition share: 321
public highway bridges: 1980
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.

Auglaize County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Auglaize County ranks #4 of 88 Ohio counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 0.3%). Auglaize County, Ohio contains 321 public highway bridges. Roughly 81.9% are rated “Good,” 17.8% “Fair,” and 0.3% “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

321

Public highway bridges in Auglaize County

Good condition

81.9%

263 of 321 rated 7-9

Fair condition

17.8%

57 of 321 rated 5-6

Poor condition

0.3%

1 of 321 rated 4 or below

In-state Poor-share rank

#4 of 88

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

Condition distribution

Share of 321 NBI-tracked bridges by lowest applicable component rating.

Good

81.9% (263)

Fair

17.8% (57)

Poor

0.3% (1)

Auglaize County's Poor-condition bridges carry 4,074 vehicle crossings a day

That is 0.7% of the county's reported daily bridge traffic on 0.3% of its bridges: Poor-condition structures carry more traffic than their share of the inventory. Each Poor bridge averages 4,074 crossings a day against 1,844 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 321 of 321 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.

39.3% of Auglaize County's bridges have passed the 50-year mark

126 of the 321 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 81.9% 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 100% of the county's Poor-condition bridge traffic

HAMILTON STREET over AUGLAIZE RIVER, built 1968, carries 4,074 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 1-bridge count understates how much of the daily burden sits on a single crossing.

Share is of the 4,074 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.

pre-1900

1
1900s

1
1910s

1
1920s

4
1930s

4
1940s

7
1950s

30
1960s

50
1970s

44
1980s

62
1990s

66
2000s

30
2010s

19
2020s

2

What this shows Construction peaked in the 1990s, when 66 of the county's bridges still in the inventory were built, which is 20.6% of those with a recorded year. That cohort is now 25 to 34 years old in the 2024 inventory. Its average build year (1980) matches the Ohio average (1977).

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

The 5 Ohio counties nearest Auglaize County in number of bridges, with their condition splits. Its 0.3% Poor share is the 2nd-lowest of these 6. Its average build year of 1980 against a peer-group mean of 1974 is 6 years newer.

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

Bridge inventory size and condition shares for Auglaize County and the 5 Ohio counties closest to it in inventory size
County	Bridges	Good	Fair	Poor	Avg. built
Columbiana County	321	58.9%	38.6%	2.5%	1961
Auglaize County (this page)	321	81.9%	17.8%	0.3%	1980
Fairfield County	320	56.6%	38.4%	5%	1973
Clermont County	319	61.4%	30.1%	8.5%	1972
Van Wert County	317	89%	11%	0%	1982
Miami County	315	72.1%	21%	7%	1983

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

Similar inventory size

Nearest county inventories outside OH (321 bridges here).

Christian County, IL · 321 bridges
Jackson County, IN · 321 bridges
Umatilla County, OR · 321 bridges
Giles County, TN · 321 bridges

Similar average build year

Nearest mean year-built outside OH (1980 here).

Tulsa County, OK · avg 1980 · 1,135 bridges
Miami-Dade County, FL · avg 1980 · 1,057 bridges
Pulaski County, AR · avg 1980 · 721 bridges
McLennan County, TX · avg 1980 · 714 bridges

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

All 321 Good 263 Fair 57 Poor 1

Good-condition bridges (263)

Sort:

Auglaize County Bridge Snapshot

Condition distribution

Auglaize County's Poor-condition bridges carry 4,074 vehicle crossings a day

39.3% of Auglaize County's bridges have passed the 50-year mark

One structure carries 100% of the county's Poor-condition bridge traffic

How Auglaize 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 (263)

KELLY ROAD

MAIER BARBER ROAD

GLYNWOOD ROAD

HARDIN PIKE

BOUNDARY ROAD

HOWELL ROAD

AMSTERDAM ROAD

DELPHOS-ST. MARYS

HARDIN PIKE

I.O.O.F. ROAD

BLANK PIKE

ST MARYS RIVER RD

HENSCHEN ROAD

WASHINGTON PIKE

PIQUA-ST. MARYS RD

DEEP CUT ROAD

CLOVER FOUR ROAD

WAPAK-CRIDERS RD

LOCK TWO ROAD

NOBLE ROAD

PLATTNER ROAD

GLYNWOOD-N.K. ROAD

FIRST STREET

WRESTLE CREEK ROAD

FRYBURG EAST ROAD

MUDSOCK ROAD

TRI-TOWNSHIP ROAD

BOWSHER ROAD

MONROE ROAD

PLANK PIKE

GREENVILLE ROAD

SCHOOLER ROAD

NOBLE ROAD

IR-75

CR-208 NATIONAL RD

HARRISON STREET

DEEP CUT ROAD

GERMAN STREET

USR 33

MOULTON ANGLE ROAD

SOUTHLAND ROAD

MUDSOCK ROAD

GLYNWOOD ROAD

GOLDEN BRIDGE ROAD

EISLEY ROAD

GRAHAM ROAD

MIDDLE PIKE

SANTA FE-NEW KNOXV

USR 33

USR 33

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