County profile · official public datasets

Clinton County, OH

209 public highway bridges tracked in the FHWA National Bridge Inventory: 73.7% rated Good, 24.4% Fair, 1.9% Poor.

209
Public bridges: 73.7%
Good condition: 1.9%
Poor condition

The verdict

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

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

Top 22%
lowest Poor share in state: 1.9%
Poor-condition share: 209
public highway bridges: 1979
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.

Clinton County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Clinton County ranks #19 of 88 Ohio counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 1.9%). Clinton County, Ohio contains 209 public highway bridges. Roughly 73.7% are rated “Good,” 24.4% “Fair,” and 1.9% “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

209

Public highway bridges in Clinton County

Good condition

73.7%

154 of 209 rated 7-9

Fair condition

24.4%

51 of 209 rated 5-6

Poor condition

1.9%

4 of 209 rated 4 or below

In-state Poor-share rank

#19 of 88

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

Condition distribution

Share of 209 NBI-tracked bridges by lowest applicable component rating.

Good

73.7% (154)

Fair

24.4% (51)

Poor

1.9% (4)

Clinton County's Poor-condition bridges carry 6,714 vehicle crossings a day

That is 1.7% of the county's reported daily bridge traffic on 1.9% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 1,679 crossings a day against 1,681 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 209 of 209 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.

33.5% of Clinton County's bridges have passed the 50-year mark

70 of the 209 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 73.7% 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 37.1% of the county's Poor-condition bridge traffic

SR 350 over SEWELL RUN, built 1961, carries 2,494 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 6,714 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
1930s

6
1940s

6
1950s

14
1960s

34
1970s

22
1980s

53
1990s

38
2000s

18
2010s

12
2020s

1

What this shows Construction peaked in the 1980s, when 53 of the county's bridges still in the inventory were built, which is 25.4% of those with a recorded year. That cohort is now 35 to 44 years old in the 2024 inventory. Its average build year (1979) matches the Ohio average (1977).

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

The 5 Ohio counties nearest Clinton County in number of bridges, with their condition splits. Its 1.9% Poor share is the 1st-lowest of these 6. Its average build year of 1979 against a peer-group mean of 1973 is 6 years newer.

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

Bridge inventory size and condition shares for Clinton County and the 5 Ohio counties closest to it in inventory size
County	Bridges	Good	Fair	Poor	Avg. built
Putnam County	213	54.9%	40.4%	4.7%	1982
Lake County	210	52.9%	38.6%	8.6%	1973
Clinton County (this page)	209	73.7%	24.4%	1.9%	1979
Holmes County	208	43.3%	53.8%	2.9%	1978
Noble County	208	45.2%	47.6%	7.2%	1959
Meigs County	207	45.4%	51.7%	2.9%	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 Clinton 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 Clinton County, both outside Ohio so the neighborhoods are not the same-state size table above.

Similar inventory size

Nearest county inventories outside OH (209 bridges here).

McDonough County, IL · 209 bridges
Grant County, LA · 209 bridges
Iowa County, WI · 209 bridges
Fulton County, IL · 210 bridges

Similar average build year

Nearest mean year-built outside OH (1979 here).

Pima County, AZ · avg 1979 · 1,150 bridges
Jefferson County, KY · avg 1979 · 662 bridges
Spartanburg County, SC · avg 1979 · 638 bridges
McPherson County, KS · avg 1979 · 586 bridges

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

All 209 Good 154 Fair 51 Poor 4

All bridges (209)

Sort:

WILLIAMS ROAD

Fair

Over: TRIB OF DUTCH CREEK

1.17 MI N OF SR 73, Clinton, OH

Clinton County Bridge Snapshot

Condition distribution

Clinton County's Poor-condition bridges carry 6,714 vehicle crossings a day

33.5% of Clinton County's bridges have passed the 50-year mark

One structure carries 37.1% of the county's Poor-condition bridge traffic

How Clinton 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 (209)

WILLIAMS ROAD

CUBA ROAD

CLARKSVILLE ROAD

OGLESBEE ROAD

BERLIN ROAD

DOVER ROAD

FRAZIER ROAD

MCKAY ROAD

INWOOD ROAD

MACEDONIA ROAD

SR 134

GURNEYVILLE ROAD

CHAMPLIN ROAD

LYTLE ROAD

DWIGGINS ROAD

SR 729

WEST DALTON ROAD

US 22

US 68

SMITH RD T239

SR 123

CREEK ROAD

JONESBORO ROAD

SR 380

PRAIRIE ROAD

CLARKSVILLE ROAD

ANTIOCH ROAD

PATCH ROAD

BERNARD ROAD

STATE ROUTE 22

US 68

US 68

US 68

SB US 68

SB US 68

US 68

SR 73

SR73

SR73

SR 73

SR73

SR 123

SR 134

SR 380

SR 730

BLACK ROAD

SR 730

GIBSON ROAD

RAPID FORD ROAD

COX ROAD

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