County profile · official public datasets

Somerset County, PA

454 public highway bridges tracked in the FHWA National Bridge Inventory: 33% rated Good, 52.6% Fair, 14.3% Poor.

454
Public bridges
33%
Good condition
14.3%
Poor condition

The verdict

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

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

47th
of 67 on Poor share
14.3%
Poor-condition share
454
public highway bridges
1969
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.

Somerset County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Somerset County ranks #47 of 67 Pennsylvania counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 14.3%). Somerset County, Pennsylvania contains 454 public highway bridges. Roughly 33% are rated “Good,” 52.6% “Fair,” and 14.3% “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

454

Public highway bridges in Somerset County

Good condition

33%

150 of 454 rated 7-9

Fair condition

52.6%

239 of 454 rated 5-6

Poor condition

14.3%

65 of 454 rated 4 or below

In-state Poor-share rank

#47 of 67

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

Condition distribution

Share of 454 NBI-tracked bridges by lowest applicable component rating.

Good
33% (150)
Fair
52.6% (239)
Poor
14.3% (65)

Somerset County's Poor-condition bridges carry 28,299 vehicle crossings a day

That is 2.3% of the county's reported daily bridge traffic on 14.1% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 442 crossings a day against 2,704 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 453 of 454 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.

56.6% of Somerset County's bridges have passed the 50-year mark

257 of the 454 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 33% 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 22.4% of the county's Poor-condition bridge traffic

US 219 SBL over T685 MILLER ROAD, built 1969, carries 6,344 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 65-bridge count understates how much of the daily burden sits on a single crossing.

Share is of the 28,299 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.

When Somerset County's bridges were built

454 bridges with a recorded construction year, grouped by decade

bridges

What this shows Construction peaked in the 2010s, when 80 of the county's bridges still in the inventory were built, which is 17.6% of those with a recorded year. That cohort is now 5 to 14 years old in the 2024 inventory. Its average build year (1969) matches the Pennsylvania average (1970).

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

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

The 5 Pennsylvania counties nearest Somerset County in number of bridges, with their condition splits. Its 14.3% Poor share is the 4th-lowest of these 6. Its average build year of 1969 against a peer-group mean of 1974 is 5 years older.

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

Bridge inventory size and condition shares for Somerset County and the 5 Pennsylvania counties closest to it in inventory size
County Bridges Poor
Luzerne County 457 25.6%
Somerset County (this page) 454 14.3%
Dauphin County 449 8.5%
Erie County 442 9.5%
Mercer County 438 15.5%
Tioga County 429 3.3%

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

Similar inventory size

Nearest county inventories outside PA (454 bridges here).

Similar average build year

Nearest mean year-built outside PA (1969 here).

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

All 454 Good 150 Fair 239 Poor 65

Fair-condition bridges (239)

T407 PACK SADDLE R

Fair

Over: BRUSH CREEK

3 MI.NW.OF FAIRHOPE, Somerset, PA

Built 1998 Load: 35.4 t ADT: 50

T-628 Q.DAM ROAD

Fair

Over: QUEMAHONING RESERVOIR

2.5 MI.E.OF BOSWELL, Somerset, PA

Built 1939 Load: 35.6 t ADT: 350

PA 31

Fair

Over: EAST BRANCH COXES CREEK

0.14 MILE EAST OF PA 281N, Somerset, PA

Built 2012 Load: 36.0 t ADT: 13,258

SR 2013

Fair

Over: GLADDENS RUN

.6 MI.E.OF GLADDENS, Somerset, PA

Built 1949 Load: 36.3 t ADT: 263

SR 4010

Fair

Over: TWO MILE RUN

1 MI.NE.OF RANDOLPH, Somerset, PA

Built 1903 Load: 36.3 t ADT: 113

T323 TUB MILL ROAD

Fair

Over: TUB MILL RUN

2 MI.W.OF SALISBURY, Somerset, PA

Built 1960 Load: 36.3 t ADT: 50

BABCOCK CREEK ROAD

Fair

Over: BABCOCK CREEK

1.4 MI. NE OF LOST TURKEY, Somerset, PA

Built 2018 Load: 36.9 t ADT: 25

PA 160

Fair

Over: BOONE RUN

4 MI.S.OF REELS CORNER, Somerset, PA

Built 1955 Load: 37.2 t ADT: 1,508

PA 281

Fair

Over: MIDDLE CREEK

1MI.S.NEW OF CENTERVILLE, Somerset, PA

Built 1927 Load: 37.2 t ADT: 3,007

SR 1006

Fair

Over: LAKE STONYCREEK

LAKE STONYCREEK, Somerset, PA

Built 1966 Load: 37.2 t ADT: 377

T864 WHITE CREEK R

Fair

Over: WHITES CREEK

1.3 MILE E.OF LISTONBURG, Somerset, PA

Built 1961 Load: 37.2 t ADT: 73

US 219 NBL

Fair

Over: SR 2047 & CSX RAILROAD

1.5 MI. N OF MEYERSDALE, Somerset, PA

Built 1998 Load: 37.2 t ADT: 1,861

US 219 NBL

Fair

Over: T685 MILLER ROAD

1.8 MILE SOUTH OF TR 30, Somerset, PA

Built 1969 Load: 38.1 t ADT: 6,276

SR 1023

Fair

Over: OVEN RUN

.5 MI.E.OF ROWENA, Somerset, PA

Built 1962 Load: 38.1 t ADT: 182

SR 1039 (12TH ST)

Fair

Over: PAINT CREEK

WINDBER BORO 12TH.ST.EXT., Somerset, PA

Built 1959 Load: 38.1 t ADT: 4,619

SR 2010

Fair

Over: PINEY RUN

2.9 MI.SE.OF SALISBURY, Somerset, PA

Built 1956 Load: 38.1 t ADT: 226

T718 MILLER RUN RD

Fair

Over: FLAUGHERTY CREEK

.5 MI.S.OF SANDPATCH, Somerset, PA

Built 1963 Load: 38.1 t ADT: 33

T460 WHIPKEY DAM R

Fair

Over: LAUREL HILL CREEK

METZLER, Somerset, PA

Built 1958 Load: 38.1 t ADT: 186

SR 2047

Fair

Over: FLAUGHERTY CREEK

MEYERSDALE BOROUGH, Somerset, PA

Built 1914 Load: 39.0 t ADT: 4,886

PA 281

Fair

Over: LICKING RUN

URSINA, Somerset, PA

Built 1953 Load: 39.0 t ADT: 1,738

T-677 Barnett Rd

Fair

Over: Unnamd Tr Quemahoning Ck

3 Mi S of Jennerstown, Somerset, PA

Built 1928 Load: 39.0 t ADT: 100

US 219

Fair

Over: MEADOW RUN

.2 MI.S.OF SALISBURY, Somerset, PA

Built 1953 Load: 39.9 t ADT: 5,546

T-565 COV.BR.RD.

Fair

Over: STONYCREEK RIVER

1.5 MI.NW.OF SHANKSVILLE, Somerset, PA

Built 1881 Load: 39.9 t ADT: 50

PA 31

Fair

Over: US 219

.8 MI.E.OF SOMERSET, Somerset, PA

Built 1973 Load: 40.8 t ADT: 4,716

SR 2026

Fair

Over: TRIB BLUE LICK CREEK

BERKLEYS MILLS, Somerset, PA

Built 1937 Load: 40.8 t ADT: 191

SR 4051

Fair

Over: PAINT CREEK

PAINT BOROUGH, Somerset, PA

Built 1924 Load: 40.8 t ADT: 948

PA TPK (I-76)

Fair

Over: SR 0281

EAST OF SOMERSET INTERCHG, Somerset, PA

Built 1939 Load: 40.8 t ADT: 29,452

T618 OLDMILL ROAD

Fair

Over: MILLER RUN

2 MI.SW.OF BERLIN, Somerset, PA

Built 1916 Load: 40.8 t ADT: 50

PA 160

Fair

Over: CLEAR RUN

.6 MI.S.OF REELS CORNER, Somerset, PA

Built 1955 Load: 41.7 t ADT: 1,627

US 219

Fair

Over: PINEY CREEK

BOYNTON, Somerset, PA

Built 1923 Load: 41.7 t ADT: 4,865

PA 281

Fair

Over: LAUREL HILL CREEK

CONFLUENCE BOROUGH, Somerset, PA

Built 1935 Load: 41.7 t ADT: 1,738

SR 1001

Fair

Over: STONY CREEK

SHANKSVILLE BORO, Somerset, PA

Built 1989 Load: 41.7 t ADT: 2,744

SR 2015

Fair

Over: WILLS CREEK

GLENCOE, Somerset, PA

Built 1957 Load: 41.7 t ADT: 69

SR 3017

Fair

Over: WEST BRANCH COXES CREEK

1.5 MI SW OF SOMERSET, Somerset, PA

Built 1945 Load: 41.7 t ADT: 477

T524 SECHLER ROAD

Fair

Over: CSX RAILROAD

GEIGER, Somerset, PA

Built 1989 Load: 41.7 t ADT: 920

SR 2006 Deal Road

Fair

Over: CSX RR & TRIB FLAUGHERTY

SAND PATCH, Somerset, PA

Built 2000 Load: 41.7 t ADT: 354

PA TPK (I-76) RAMP

Fair

Over: BRANCH COXES CREEK

SOMERSET INTERCHANGE, Somerset, PA

Built 2005 Load: 41.7 t ADT: 2,830

SR 1010

Fair

Over: OVEN RUN

1.6 MI.E.OF KANTNER, Somerset, PA

Built 1914 Load: 42.6 t ADT: 102

PA TPK (I-76)

Fair

Over: BRANCH OF COXES CREEK

SOMERSET, Somerset, PA

Built 1939 Load: 42.6 t ADT: 30,880

T-501 BEAGLE ROAD

Fair

Over: COXES CREEK

3 MI.NE.OF ROCKWOOD, Somerset, PA

Built 1987 Load: 42.6 t ADT: 50

COLE RUN ROAD

Fair

Over: BLUE HOLE CREEK

2 MI NW OF FALL RUN ROAD, Somerset, PA

Built 1999 Load: 42.6 t ADT: 40

US 219 NBL

Fair

Over: CASSELMAN R & CSX RR

1.5 MI.NW OF MEYERSDALE, Somerset, PA

Built 1998 Load: 42.6 t ADT: 1,861

SR 2001

Fair

Over: TUB MILL RUN

COMPTON, Somerset, PA

Built 1928 Load: 43.5 t ADT: 333

SR 3003

Fair

Over: LAUREL HILL CREEK

CONFLUENCE, Somerset, PA

Built 1901 Load: 43.5 t ADT: 235

SR 4033

Fair

Over: ROARING RUN

PILLTOWN, Somerset, PA

Built 1908 Load: 43.5 t ADT: 100

T678 FLICK HILL RD

Fair

Over: N.BR.QUEMAHONING CREEK

2.8 MI.W.OF SIPESVILLE, Somerset, PA

Built 1919 Load: 43.5 t ADT: 20

T-773 CRESCENT DR

Fair

Over: CLEAR SHADE CREEK

VILLAGE OF OGLETOWN, Somerset, PA

Built 1992 Load: 43.5 t ADT: 100

T-626 TEDROW ROAD

Fair

Over: BEAVER DAM CREEK

2.4 MI.SW.OF STOYSTOWN, Somerset, PA

Built 1907 Load: 43.5 t ADT: 25

T318 Sandy Run RD

Fair

Over: SANDY RUN

6 MI.W.OF NEW LEXINGTON, Somerset, PA

Built 1910 Load: 43.5 t ADT: 25

SR 3003

Fair

Over: DRAKE RUN

DRAKETOWN, Somerset, PA

Built 2003 Load: 43.5 t ADT: 235

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.