County profile · official public datasets

Westmoreland County, PA

620 public highway bridges tracked in the FHWA National Bridge Inventory: 36.5% rated Good, 47.7% Fair, 15.8% Poor.

620
Public bridges
36.5%
Good condition
15.8%
Poor condition

The verdict

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

Westmoreland County pairs a higher-than-median Poor-condition share among rated counties in the state with a newer average build year than the state inventory.

52nd
of 67 on Poor share
15.8%
Poor-condition share
620
public highway bridges
1975
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.

Westmoreland County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Westmoreland County ranks #52 of 67 Pennsylvania counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 15.8%). Westmoreland County, Pennsylvania contains 620 public highway bridges. Roughly 36.5% are rated “Good,” 47.7% “Fair,” and 15.8% “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

620

Public highway bridges in Westmoreland County

Good condition

36.5%

226 of 620 rated 7-9

Fair condition

47.7%

296 of 620 rated 5-6

Poor condition

15.8%

98 of 620 rated 4 or below

In-state Poor-share rank

#52 of 67

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

Condition distribution

Share of 620 NBI-tracked bridges by lowest applicable component rating.

Good
36.5% (226)
Fair
47.7% (296)
Poor
15.8% (98)

Westmoreland County's Poor-condition bridges carry 153,556 vehicle crossings a day

That is 3.8% of the county's reported daily bridge traffic on 15.4% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 1,616 crossings a day against 6,261 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 617 of 620 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.

45.8% of Westmoreland County's bridges have passed the 50-year mark

284 of the 620 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 36.5% 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 8.6% of the county's Poor-condition bridge traffic

SR 0356 over PINE RUN, built 1927, carries 13,272 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 98-bridge count understates how much of the daily burden sits on a single crossing.

Share is of the 153,556 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.

When Westmoreland County's bridges were built

620 bridges with a recorded construction year, grouped by decade

bridges

What this shows Construction peaked in the 1990s, when 91 of the county's bridges still in the inventory were built, which is 14.7% of those with a recorded year. That cohort is now 25 to 34 years old in the 2024 inventory. Its average build year is 1975, 5 years newer than the Pennsylvania average of 1970.

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

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

The 5 Pennsylvania counties nearest Westmoreland County in number of bridges, with their condition splits. Its 15.8% Poor share is the 6th-lowest of these 6. Its average build year of 1975 against a peer-group mean of 1965 is 10 years newer.

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

Bridge inventory size and condition shares for Westmoreland County and the 5 Pennsylvania counties closest to it in inventory size
County Bridges Poor
Chester County 680 13.7%
Berks County 667 15%
Washington County 655 12.1%
Westmoreland County (this page) 620 15.8%
Philadelphia County 585 13.2%
York County 569 13%

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

Similar inventory size

Nearest county inventories outside PA (620 bridges here).

Similar average build year

Nearest mean year-built outside PA (1975 here).

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

All 620 Good 226 Fair 296 Poor 98

Good-condition bridges (226)

SR 3111

Good

Over: I-76 Trib Sewickley Crk

New Stanton, Westmoreland, PA

Built 2008 Load: 62.6 t ADT: 9,705

SR 0381

Good

Over: ROLLING ROCK CREEK

LIGONIER TOWNSHIP, Westmoreland, PA

Built 1993 Load: 63.5 t ADT: 983

PA TPK (PA 66) SB

Good

Over: T-871

HEMPFIELD TWP, Westmoreland, PA

Built 1993 Load: 63.5 t ADT: 10,429

PA TPK (PA 66)

Good

Over: T-871

HEMPFIELD TWP, Westmoreland, PA

Built 1993 Load: 63.5 t ADT: 10,429

PA TPK (PA-66)

Good

Over: T-690

HEMPFIELD TWP, Westmoreland, PA

Built 1991 Load: 66.2 t ADT: 3,671

HUNTERS LANE-T309

Good

Over: INDIAN CREEK

0.25 MI N.W.OF SR 381, Westmoreland, PA

Built 2003 Load: 68.0 t ADT: 20

SR 0130

Good

Over: Slate Creek

SE of Greensburg, Westmoreland, PA

Built 2009 Load: 68.9 t ADT: 4,687

SR 1023

Good

Over: MCMULLEN RUN

LIGONIER TOWNSHIP, Westmoreland, PA

Built 1993 Load: 69.9 t ADT: 699

SR 4003

Good

Over: BRUSH CREEK

HEMPFIELD & PENN TOWNSHIP, Westmoreland, PA

Built 1997 Load: 70.8 t ADT: 2,244

SR 0819

Good

Over: Sherrick Run

0.1 mi S from SR 0119, Westmoreland, PA

Built 2016 Load: 71.3 t ADT: 9,880

PA TPK (I-76)

Good

Over: SR 3093; Wentsler Road

NEW STANTON INTERCHANGE, Westmoreland, PA

Built 1963 Load: 74.4 t ADT: 9,244

SR 0022

Good

Over: PA 66

SALEM TWP, Westmoreland, PA

Built 2000 Load: 74.4 t ADT: 29,974

DEPOT STREET

Good

Over: JACKS RUN

DEPOT STREET, Westmoreland, PA

Built 2006 Load: 74.4 t ADT: 2,835

SR 0982

Good

Over: SAXMAN RUN

DERRY TWP, Westmoreland, PA

Built 2000 Load: 75.3 t ADT: 6,310

SR 0981

Good

Over: BARREN RUN

SOUTH HUNTINGTON TWP., Westmoreland, PA

Built 2002 Load: 78.0 t ADT: 1,514

BEATTY COUNTY ROAD

Good

Over: MONASTERY RUN

ST VINCENT DR INTERSECT, Westmoreland, PA

Built 2009 Load: 78.0 t ADT: 4,375

SR 0066

Good

Over: TRIBUTARY BRUSH CREEK

HEMPFIELD TOWNSHIP, Westmoreland, PA

Built 1993 Load: 85.3 t ADT: 9,928

MAPLE AVENUE

Good

Over: NORFOLK SOUTHERN M.L.

200 BLOCK MAPLE AVENUE, Westmoreland, PA

Built 2004 Load: 85.3 t ADT: 6,600

SR 0022

Good

Over: PUCKETY LANE (T-706)

MUNICIPAL OF MURRYSVILLE, Westmoreland, PA

Built 1949 Load: 89.7 t ADT: 34,027

PA TPK (I-76)

Good

Over: JACOBS CREEK

WEST OF DONEGAL INTERCHGE, Westmoreland, PA

Built 1939 Load: 89.7 t ADT: 35,220

PA TPK (I-76)

Good

Over: Little Sewickley Creek

ARONA, Westmoreland, PA

Built 2012 Load: 94.0 t ADT: 34,735

SR 0022

Good

Over: CLOVERLEAF RUN

SALEM TOWNSHIP, Westmoreland, PA

Built 1950 Load: 99.8 t ADT: 29,974

SR 0066

Good

Over: BEAVER RUN

SALEM TOWNSHIP, Westmoreland, PA

Built 1950 Load: 99.8 t ADT: 28,252

SR 0981

Good

Over: LOYALHANNA CREEK

LATROBE BOROUGH, Westmoreland, PA

Built 1918 Load: 99.8 t ADT: 12,934

SR 981

Good

Over: WOLFORD RUN

BELL TOWNSHIP, Westmoreland, PA

Built 1997 Load: 99.8 t ADT: 2,909

SR 3089

Good

Over: BUFFALO RUN

E.HUNTINGTON TWP., Westmoreland, PA

Built 2001 Load: 99.8 t ADT: 1,745

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

Related

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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.