County profile · official public datasets

Warren County, PA

217 public highway bridges tracked in the FHWA National Bridge Inventory: 36.4% rated Good, 45.2% Fair, 18.4% Poor.

217
Public bridges: 36.4%
Good condition: 18.4%
Poor condition

The verdict

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

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

57th
of 67 on Poor share: 18.4%
Poor-condition share: 217
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.

Warren County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Warren County ranks #57 of 67 Pennsylvania counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 18.4%). Warren County, Pennsylvania contains 217 public highway bridges. Roughly 36.4% are rated “Good,” 45.2% “Fair,” and 18.4% “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

217

Public highway bridges in Warren County

Good condition

36.4%

79 of 217 rated 7-9

Fair condition

45.2%

98 of 217 rated 5-6

Poor condition

18.4%

40 of 217 rated 4 or below

In-state Poor-share rank

#57 of 67

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

Condition distribution

Share of 217 NBI-tracked bridges by lowest applicable component rating.

Good

36.4% (79)

Fair

45.2% (98)

Poor

18.4% (40)

Warren County's Poor-condition bridges carry 33,298 vehicle crossings a day

That is 10.5% of the county's reported daily bridge traffic on 18.4% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 832 crossings a day against 1,461 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 217 of 217 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.

48.8% of Warren County's bridges have passed the 50-year mark

106 of the 217 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 36.4% 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 19.3% of the county's Poor-condition bridge traffic

SR 6 GRAND ARMY HY over OVER DUTCHMANS RUN, built 1948, carries 6,433 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 40-bridge count understates how much of the daily burden sits on a single crossing.

Share is of the 33,298 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.

pre-1900

1
1900s

2
1910s

3
1920s

10
1930s

16
1940s

12
1950s

28
1960s

25
1970s

19
1980s

19
1990s

30
2000s

22
2010s

27
2020s

3

What this shows Construction peaked in the 1990s, when 30 of the county's bridges still in the inventory were built, which is 13.8% of those with a recorded year. That cohort is now 25 to 34 years old in the 2024 inventory. Its average build year (1974) matches the Pennsylvania average (1970).

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

The 5 Pennsylvania counties nearest Warren County in number of bridges, with their condition splits. Its 18.4% Poor share is the 5th-lowest of these 6. Its average build year of 1974 against a peer-group mean of 1976 is in line with the group.

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

Bridge inventory size and condition shares for Warren 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 (this page)	217	36.4%	45.2%	18.4%	1974
Clinton County	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 Warren 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 Warren County, both outside Pennsylvania so the neighborhoods are not the same-state size table above.

Similar inventory size

Nearest county inventories outside PA (217 bridges here).

Sullivan County, IN · 217 bridges
Harrison County, IA · 217 bridges
Marion County, IA · 217 bridges
Ringgold County, IA · 217 bridges

Similar average build year

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

Knox County, TN · avg 1974 · 588 bridges
Summit County, OH · avg 1974 · 563 bridges
Onondaga County, NY · avg 1974 · 472 bridges
Orange County, NY · avg 1974 · 472 bridges

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

All 217 Good 79 Fair 98 Poor 40

Good-condition bridges (79)

Sort:

Warren County Bridge Snapshot

Condition distribution

Warren County's Poor-condition bridges carry 33,298 vehicle crossings a day

48.8% of Warren County's bridges have passed the 50-year mark

One structure carries 19.3% of the county's Poor-condition bridge traffic

How Warren 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

Good-condition bridges (79)

SR 3022 E.MAIN ST.

TIDIOUTE CREEK RD

T-634 S.STATE ST.

SR 4007 Bear Lake

T-526

RAMP B FROM US 6

SR 6 GRAND ARMY HY

T-304 FLAT ROAD

GRD ARMY OF RP HW

SR 6 GRAND ARMY HY

SR 957

5TH AVENUE

SR 1001

T-311 SUTTON ROAD

T-465 CREMERY RD.

SR 27

SR 1009 SWEDE HILL

GRD ARMY OF RP HW

T-590 STODDARD RD.

OLD ROUTE 6

T-326 JINKS ROAD

SR 2015 GRUNDERVIL

SR 958

SR 3002 MCGRAW RD.

SR 4021 JAMESTOWN

T-451 RIVER ROAD

AKLEY ROAD

SR 62 MARKET ST.

SR 957

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