County profile · official public datasets

Clarion County, PA

172 public highway bridges tracked in the FHWA National Bridge Inventory: 27.9% rated Good, 64% Fair, 8.1% Poor.

172
Public bridges
27.9%
Good condition
8.1%
Poor condition

The verdict

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

Clarion 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
8.1%
Poor-condition share
172
public highway bridges
1974
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.

Clarion County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Clarion County ranks #15 of 67 Pennsylvania counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 8.1%). Clarion County, Pennsylvania contains 172 public highway bridges. Roughly 27.9% are rated “Good,” 64% “Fair,” and 8.1% “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

172

Public highway bridges in Clarion County

Good condition

27.9%

48 of 172 rated 7-9

Fair condition

64%

110 of 172 rated 5-6

Poor condition

8.1%

14 of 172 rated 4 or below

In-state Poor-share rank

#15 of 67

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

Condition distribution

Share of 172 NBI-tracked bridges by lowest applicable component rating.

Good
27.9% (48)
Fair
64% (110)
Poor
8.1% (14)

Clarion County's Poor-condition bridges carry 12,056 vehicle crossings a day

That is 2.8% of the county's reported daily bridge traffic on 8.1% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 861 crossings a day against 783 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 172 of 172 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.

55.8% of Clarion County's bridges have passed the 50-year mark

96 of the 172 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 27.9% 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 79% of the county's Poor-condition bridge traffic

SR 0080 WB over SR 4005 & CANOE CREEK, built 1966, carries 9,530 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 14-bridge count understates how much of the daily burden sits on a single crossing.

Share is of the 12,056 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.

When Clarion County's bridges were built

172 bridges with a recorded construction year, grouped by decade

bridges

What this shows Construction peaked in the 1960s, when 51 of the county's bridges still in the inventory were built, which is 29.7% of those with a recorded year. That cohort is now 55 to 64 years old in the 2024 inventory. Its average build year (1974) matches the Pennsylvania average (1970).

Source FHWA National Bridge Inventory (year built) As of 2024 NBI release

How Clarion County compares with Pennsylvania's closest counties by inventory size

The 5 Pennsylvania counties nearest Clarion County in number of bridges, with their condition splits. Its 8.1% Poor share is the 3rd-lowest of these 6. Its average build year of 1974 against a peer-group mean of 1967 is 7 years newer.

Showing the 5 closest of 66 Pennsylvania counties eligible for comparison.

Bridge inventory size and condition shares for Clarion County and the 5 Pennsylvania counties closest to it in inventory size
County Bridges Poor
Perry County 183 14.2%
Clarion County (this page) 172 8.1%
Juniata County 169 13.6%
Union County 163 4.3%
Snyder County 161 5.6%
Fulton County 159 11.9%

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

Similar inventory size

Nearest county inventories outside PA (172 bridges here).

Similar average build year

Nearest mean year-built outside PA (1974 here).

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

All 172 Good 48 Fair 110 Poor 14

All bridges (172)

T-374 MORRIS ROAD

Good

Over: LICKING CREEK

0.1 mi S int w/ SR 0058, Clarion, PA

Built 2008 Load: 53.5 t ADT: 50

OLD FRYBURG RD

Good

Over: LICKING CREEK

HUEFNER NO.3, Clarion, PA

Built 2017 Load: 53.8 t ADT: 382

T-577 KINBAHE RD

Good

Over: TOBY CREEK

1.6 mi E int. w/ SR 66, Clarion, PA

Built 2004 Load: 54.4 t ADT: 50

T-447 MCGREGOR RD

Good

Over: LITTLE PINEY CREEK

0.1 mi W int. w/ SR 66, Clarion, PA

Built 2004 Load: 60.8 t ADT: 50

T-336 BITTERSWEET

Good

Over: BEAVER CREEK

1 mi N int w/ SR 208, Clarion, PA

Built 2007 Load: 62.6 t ADT: 50

SR2009

Good

Over: WILDCAT RUN

LAWSONHAM NO.2, Clarion, PA

Built 1938 Load: 65.3 t ADT: 427

SR 3006

Good

Over: CATFISH RUN

CATFISH RUN, Clarion, PA

Built 1901 Load: 77.1 t ADT: 33

T-528 RAPP ROAD

Good

Over: PINEY CREEK

0.25 mi S of Reidsburg, Clarion, PA

Built 1960 Load: 99.8 t ADT: 50

T-345 MEHRTEN RD

Poor

Over: BEAVER CREEK

2.9 mi SW int w/ SR 208, Clarion, PA

Built 1950 Load: 0.0 t ADT: 50

T-327 SHETTLER RD

Poor

Over: CANOE CREEK

0.5 mi SW int w/ SR 208, Clarion, PA

Built 1902 Load: 4.5 t ADT: 50

T-403 BURNT MILLS

Poor

Over: BEAVER CREEK

0.3 mi SE int w/ SR 338, Clarion, PA

Built 1970 Load: 8.2 t ADT: 50

T-504 WINDMILL RD

Poor

Over: TOWN RUN

3.3 mi N of Hawthorne, Clarion, PA

Built 1940 Load: 9.1 t ADT: 50

T-619 MOORE DRIVE

Poor

Over: TOBY CREEK

1.2 mi SW int w/ SR 1013, Clarion, PA

Built 1975 Load: 10.9 t ADT: 50

T-647 HAGANTOWN RD

Poor

Over: TRIB TO ALLEGHENY RIVER

0.5 mi SW int w/ SR 368, Clarion, PA

Built 1920 Load: 15.4 t ADT: 50

T-341 MYERS HOLLOW

Poor

Over: CHERRY RUN

0.1 mi W int w/ SR 2009, Clarion, PA

Built 1950 Load: 17.2 t ADT: 50

T-385 EAGLE FURNAC

Poor

Over: CANOE CREEK

0.2 mi E int w/ SR 3007, Clarion, PA

Built 1960 Load: 26.3 t ADT: 50

T-865 CAMP COFFMAN

Poor

Over: EAST SANDY CREEK

2.1 mi N int w/ SR 322, Clarion, PA

Built 1961 Load: 29.0 t ADT: 200

T-689 WILDCAT SCHL

Poor

Over: WILDCAT RUN

0.1 mi E int w/ SR 0861, Clarion, PA

Built 1963 Load: 31.8 t ADT: 50

SR4004

Poor

Over: LICKING CREEK

LICKINGVILLE NO.2, Clarion, PA

Built 1960 Load: 32.7 t ADT: 763

T-921 TOWN RUN RD

Poor

Over: TOWN RUN

2.0 mi NW of Hawthorne, Clarion, PA

Built 1937 Load: 32.7 t ADT: 350

SR 0080 WB

Poor

Over: SR 4005 & CANOE CREEK

CANOE CREEK WB, Clarion, PA

Built 1966 Load: 35.4 t ADT: 9,530

SR4004

Poor

Over: TRIB TO LICKING CREEK

TYLERSBURG NO.2, Clarion, PA

Built 1934 Load: 42.6 t ADT: 763

Read our methodology - how this data is sourced, computed, and verified.

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Data sourced from official public datasets. See our methodology for details. Retrieved and formatted by PlainBridges

Every figure on PlainBridges is rendered directly from federal source data, no number is typed in by an editor. This page draws directly on federal source data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. NBI condition categories reflect the latest reported inventory record, not a live safety, closure, or travel decision.