County profile · official public datasets

Clinton County, PA

212 public highway bridges tracked in the FHWA National Bridge Inventory: 42.9% rated Good, 54.7% Fair, 2.4% Poor.

212
Public bridges: 42.9%
Good condition: 2.4%
Poor condition

The verdict

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

Clinton County pairs a top-1% lowest Poor-condition share among rated counties in the state with a newer average build year than the state inventory.

Top 1%
lowest Poor share in state: 2.4%
Poor-condition share: 212
public highway bridges: 1978
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 #1 of 67 Pennsylvania counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 2.4%). Clinton County, Pennsylvania contains 212 public highway bridges. Roughly 42.9% are rated “Good,” 54.7% “Fair,” and 2.4% “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

212

Public highway bridges in Clinton County

Good condition

42.9%

91 of 212 rated 7-9

Fair condition

54.7%

116 of 212 rated 5-6

Poor condition

2.4%

5 of 212 rated 4 or below

In-state Poor-share rank

#1 of 67

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

Condition distribution

Share of 212 NBI-tracked bridges by lowest applicable component rating.

Good

42.9% (91)

Fair

54.7% (116)

Poor

2.4% (5)

Clinton County's Poor-condition bridges carry 2,290 vehicle crossings a day

That is 0.3% of the county's reported daily bridge traffic on 2.4% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 458 crossings a day against 2,265 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 212 of 212 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.

42% of Clinton County's bridges have passed the 50-year mark

89 of the 212 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 42.9% 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 67.7% of the county's Poor-condition bridge traffic

SR 880-PA 880 over RAUCHTOWN CREEK, built 1930, carries 1,550 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 5-bridge count understates how much of the daily burden sits on a single crossing.

Share is of the 2,290 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.

pre-1900

1
1900s

2
1910s

1
1920s

7
1930s

15
1940s

3
1950s

10
1960s

29
1970s

56
1980s

16
1990s

15
2000s

30
2010s

22
2020s

5

What this shows Construction peaked in the 1970s, when 56 of the county's bridges still in the inventory were built, which is 26.4% of those with a recorded year. That cohort is now 45 to 54 years old in the 2024 inventory. Its average build year is 1978, 8 years newer than the Pennsylvania average of 1970.

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

The 5 Pennsylvania counties nearest Clinton County in number of bridges, with their condition splits. Its 2.4% Poor share is the 1st-lowest of these 6. Its average build year of 1978 against a peer-group mean of 1975 is in line with the group.

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

Bridge inventory size and condition shares for Clinton County and the 5 Pennsylvania counties closest to it in inventory size
County	Bridges	Good	Fair	Poor	Avg. built
Lebanon County	228	28.9%	62.3%	8.8%	1971
McKean County	226	43.8%	37.6%	18.6%	1979
Warren County	217	36.4%	45.2%	18.4%	1974
Clinton County (this page)	212	42.9%	54.7%	2.4%	1978
Potter County	207	44.9%	42%	13%	1979
Jefferson County	202	29.2%	63.9%	6.9%	1972

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 Pennsylvania so the neighborhoods are not the same-state size table above.

Similar inventory size

Nearest county inventories outside PA (212 bridges here).

Holmes County, MS · 212 bridges
Comanche County, TX · 212 bridges
Dodge County, WI · 212 bridges
Bonneville County, ID · 213 bridges

Similar average build year

Nearest mean year-built outside PA (1978 here).

Orange County, CA · avg 1978 · 1,164 bridges
Sumner County, KS · avg 1978 · 659 bridges
Allen County, IN · avg 1978 · 613 bridges
Livingston County, IL · avg 1978 · 579 bridges

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

All 212 Good 91 Fair 116 Poor 5

Fair-condition bridges (116)

Sort:

Clinton County Bridge Snapshot

Condition distribution

Clinton County's Poor-condition bridges carry 2,290 vehicle crossings a day

42% of Clinton County's bridges have passed the 50-year mark

One structure carries 67.7% of the county's Poor-condition bridge traffic

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

Nationwide counties with similar inventory size or average build year

Similar inventory size

Similar average build year

Fair-condition bridges (116)

SR 220-US 220

SR 64-PA 64

T-350

SR 2012

SR 150-PA 150

SR 120-PA 120

SR 1002

SR 220-US 220

SR 220-US 220

T404 QUEENS RUN RD

SR 477-PA 477

SR 150-PA 150

T-322 ISLAND RD

SR 120-PA 120

SR 1002

SR 120-PA 120

SR 120-PA 120

T-354 RAG VALLEY

T-307

SR 44-PA 44

SR 220-US 220

ON TSR 579

ON TSR 579

T-352

SR 144-PA 144

SR 220-US 220

SR 220-US 220

SR 880-PA 880

ON TSR 342

SR 2008

SR 2015

SR 2015

ENTRANCE ROAD

SR 120-PA 120

SR 120-PA 120

SR 220-US 220 NB

ON TSR 342

T-558 BUCKTAIL AVE

SR 220-US 220 SB

SR 220-US 220

SR 220-US 220

SR 1005

SR 44-PA 44

SR 80-I 80

SR 120-PA 120

SR 150-PA 150

SR 150-PA 150

SR 150-PA 150

SR 220-US 220

SR 220-US 220

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