County profile · official public datasets

Gallia County, OH

237 public highway bridges tracked in the FHWA National Bridge Inventory: 38.4% rated Good, 56.1% Fair, 5.5% Poor.

237
Public bridges: 38.4%
Good condition: 5.5%
Poor condition

The verdict

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

Gallia County posts a higher-than-median Poor-condition share among rated counties in the state across mid-size county bridge inventory.

56th
of 88 on Poor share: 5.5%
Poor-condition share: 237
public highway bridges: 1973
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.

Gallia County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Gallia County ranks #56 of 88 Ohio counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 5.5%). Gallia County, Ohio contains 237 public highway bridges. Roughly 38.4% are rated “Good,” 56.1% “Fair,” and 5.5% “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

237

Public highway bridges in Gallia County

Good condition

38.4%

91 of 237 rated 7-9

Fair condition

56.1%

133 of 237 rated 5-6

Poor condition

5.5%

13 of 237 rated 4 or below

In-state Poor-share rank

#56 of 88

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

Condition distribution

Share of 237 NBI-tracked bridges by lowest applicable component rating.

Good

38.4% (91)

Fair

56.1% (133)

Poor

5.5% (13)

Gallia County's Poor-condition bridges carry 5,423 vehicle crossings a day

That is 1% of the county's reported daily bridge traffic on 5.5% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 417 crossings a day against 3,398 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 237 of 237 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.

52.7% of Gallia County's bridges have passed the 50-year mark

125 of the 237 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 38.4% 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 16% of the county's Poor-condition bridge traffic

CENTENARY SCHOOL over CLEAR FORK, built 1965, carries 869 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 13-bridge count understates how much of the daily burden sits on a single crossing.

Share is of the 5,423 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.

1900s

1
1910s

1
1920s

4
1930s

24
1940s

4
1950s

29
1960s

56
1970s

16
1980s

16
1990s

56
2000s

16
2010s

13
2020s

1

What this shows Construction peaked in the 1960s, when 56 of the county's bridges still in the inventory were built, which is 23.6% of those with a recorded year. That cohort is now 55 to 64 years old in the 2024 inventory. Its average build year (1973) matches the Ohio average (1977).

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

The 5 Ohio counties nearest Gallia County in number of bridges, with their condition splits. Its 5.5% Poor share is the 5th-lowest of these 6. Its average build year of 1973 against a peer-group mean of 1982 is 9 years older.

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

Bridge inventory size and condition shares for Gallia 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
Pike County	245	65.7%	27.8%	6.5%	1988
Williams County	242	52.5%	45%	2.5%	1974
Fayette County	241	60.2%	39%	0.8%	1979
Gallia County (this page)	237	38.4%	56.1%	5.5%	1973
Wyandot County	236	71.2%	27.1%	1.7%	1984

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

Similar inventory size

Nearest county inventories outside OH (237 bridges here).

Hawaii County, HI · 237 bridges
Winona County, MN · 237 bridges
DeKalb County, MO · 237 bridges
Boone County, NE · 237 bridges

Similar average build year

Nearest mean year-built outside OH (1973 here).

Jefferson County, AL · avg 1973 · 1,068 bridges
Erie County, NY · avg 1973 · 906 bridges
Davidson County, TN · avg 1973 · 832 bridges
Lancaster County, PA · avg 1973 · 801 bridges

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

All 237 Good 91 Fair 133 Poor 13

Good-condition bridges (91)

Sort:

Gallia County Bridge Snapshot

Condition distribution

Gallia County's Poor-condition bridges carry 5,423 vehicle crossings a day

52.7% of Gallia County's bridges have passed the 50-year mark

One structure carries 16% of the county's Poor-condition bridge traffic

How Gallia 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 (91)

SR 775

SR 588

SR 141

SR 160

SR 218

USR 35

MCCOMBS RD

USR 35

USR 35

SR 233

SR 588

SR 160

SHAFFER ROAD

LINCOLN PIKE

WISEMAN RD

SR 141

USR 35

USR 35

SR 160

PENIEL RD

ROCKY FORK RD

CR 33

SR 735

SR 218

PETERS BRANCH RD

SR 279

SWAN CREEK RD

KING CHAPEL RD

DULY RD

SR 7

BULAVILLE PIKE

SR 850

Johnson Road

CORA MILL RD

GRAVEL HILL ROAD

Barcus Hollow Rd.

STRAIGHT RD

SR 160

SR 218

SPIRES ROAD

SR 325

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