County profile · official public datasets

Franklin County, PA

294 public highway bridges tracked in the FHWA National Bridge Inventory: 29.6% rated Good, 62.2% Fair, 8.2% Poor.

294
Public bridges
29.6%
Good condition
8.2%
Poor condition

The verdict

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

Franklin County pairs a top-quartile lowest Poor-condition share among rated counties in the state with an older average build year than the state inventory.

Top 24%
lowest Poor share in state
8.2%
Poor-condition share
294
public highway bridges
1964
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.

Franklin County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Franklin County ranks #16 of 67 Pennsylvania counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 8.2%). Franklin County, Pennsylvania contains 294 public highway bridges. Roughly 29.6% are rated “Good,” 62.2% “Fair,” and 8.2% “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

294

Public highway bridges in Franklin County

Good condition

29.6%

87 of 294 rated 7-9

Fair condition

62.2%

183 of 294 rated 5-6

Poor condition

8.2%

24 of 294 rated 4 or below

In-state Poor-share rank

#16 of 67

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

Condition distribution

Share of 294 NBI-tracked bridges by lowest applicable component rating.

Good
29.6% (87)
Fair
62.2% (183)
Poor
8.2% (24)

Franklin County's Poor-condition bridges carry 54,415 vehicle crossings a day

That is 4.7% of the county's reported daily bridge traffic on 8.2% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 2,267 crossings a day against 4,367 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 294 of 294 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.

62.6% of Franklin County's bridges have passed the 50-year mark

184 of the 294 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 29.6% 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 28.2% of the county's Poor-condition bridge traffic

US 30; Lincoln Hwy over ROCKY MT CREEK, built 1948, carries 15,365 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 24-bridge count understates how much of the daily burden sits on a single crossing.

Share is of the 54,415 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.

When Franklin County's bridges were built

294 bridges with a recorded construction year, grouped by decade

bridges

What this shows Construction peaked in the 1960s, when 58 of the county's bridges still in the inventory were built, which is 19.7% of those with a recorded year. That cohort is now 55 to 64 years old in the 2024 inventory. Its average build year is 1964, 6 years older than the Pennsylvania average of 1970.

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

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

The 5 Pennsylvania counties nearest Franklin County in number of bridges, with their condition splits. Its 8.2% Poor share is the 3rd-lowest of these 6. Its average build year of 1964 against a peer-group mean of 1971 is 7 years older.

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

Bridge inventory size and condition shares for Franklin County and the 5 Pennsylvania counties closest to it in inventory size
County Bridges Poor
Indiana County 301 18.9%
Beaver County 299 10%
Northumberland County 299 6.7%
Franklin County (this page) 294 8.2%
Clearfield County 292 14%
Cambria County 284 7.4%

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

Similar inventory size

Nearest county inventories outside PA (294 bridges here).

Similar average build year

Nearest mean year-built outside PA (1964 here).

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

All 294 Good 87 Fair 183 Poor 24

Poor-condition bridges (24)

SR 3007 LEMAR RD.

Poor

Over: W BR CONOCOCHEAGUE CREEK

VILLAGE OF MARKES, Franklin, PA

Built 1960 Load: 3.6 t ADT: 1,803

BURNT MILL ROAD

Poor

Over: CONODOGUINET CREEK

2.3 MI SE OF SR 641, Franklin, PA

Built 1885 Load: 4.5 t ADT: 250

SR 3009 Corner rd.

Poor

Over: LICKING CREEK

3 MI SW OF MERCERSBURG, Franklin, PA

Built 1961 Load: 7.3 t ADT: 1,326

Cedar Street T-481

Poor

Over: BACK CREEK

BACK CR; WILLIAMSON, Franklin, PA

Built 1876 Load: 8.2 t ADT: 100

HICKORY RUN ROAD

Poor

Over: CONODOGUINET CREEK

0.63 MI. SW OF SR 4016, Franklin, PA

Built 1963 Load: 12.7 t ADT: 125

T-489 KRINER RD

Poor

Over: CSX RR

0.2 MI WEST OF SR 3016, Franklin, PA

Built 2001 Load: 17.2 t ADT: 950

SHIMPSTOWN RD

Poor

Over: LICKING CREEK

AT CLAY LICK RD INTERSECT, Franklin, PA

Built 1960 Load: 19.1 t ADT: 300

LEAFMORE RD

Poor

Over: BACK CREEK

2 MI WEST OF SR 995, Franklin, PA

Built 1959 Load: 19.1 t ADT: 600

SEWAGE PLANT ROAD

Poor

Over: CONOCOCHEAGUE CREEK

0.9 MI SW CHAMBERSBURG SQ, Franklin, PA

Built 1984 Load: 19.1 t ADT: 1,000

SR 4004

Poor

Over: CONODOGUINET CREEK

4.0 MI.W.UPPER STRASBUR, Franklin, PA

Built 1825 Load: 26.3 t ADT: 559

SR 4006 Stone Br.

Poor

Over: W BR CONOCOCHEAGUE CREEK

1MI N OF WILLOW HILL, Franklin, PA

Built 1907 Load: 26.3 t ADT: 475

CORNERTOWN RD

Poor

Over: CONOCOCHEAGUE CREEK

0.2 MI EAST OF SR 11, Franklin, PA

Built 1961 Load: 26.3 t ADT: 600

LIMEKILN DRIVE

Poor

Over: FALLING SPRING

FALLING SPRING MEADOWS BR, Franklin, PA

Built 1984 Load: 26.3 t ADT: 1,000

PA 75; SR 0075

Poor

Over: BUCK RUN

DICKEY STATION, Franklin, PA

Built 1958 Load: 28.1 t ADT: 2,219

FIFTH AVE

Poor

Over: FALLING SPRING BRANCH

0.6 MI NE CHAMBERSBURG SQ, Franklin, PA

Built 1930 Load: 29.0 t ADT: 6,000

KENNEDY STREET

Poor

Over: FALLING SPRING CREEK

1000 FT SE OF US 11, Franklin, PA

Built 1930 Load: 30.8 t ADT: 3,750

ANDERSON ROAD

Poor

Over: CONOCOCHEAGUE CREEK W BR

0.85 MI NE OF SR 416, Franklin, PA

Built 1820 Load: 32.7 t ADT: 150

PA 995; SR 0995

Poor

Over: WELSH RUN

.25 MI N E OF WELSH RUN, Franklin, PA

Built 1933 Load: 34.5 t ADT: 1,007

WEST KING STREET

Poor

Over: FALLING SPRING CREEK

300 FT W OF US 11, Franklin, PA

Built 1918 Load: 34.5 t ADT: 3,535

DICKEYS RD

Poor

Over: BUCK RUN

3 MI N OF MERCERSBURG, Franklin, PA

Built 1925 Load: 39.0 t ADT: 500

T-604 MUDDY RUN RD

Poor

Over: MUDDY RUN

0.70 MI. SW OF SR 433, Franklin, PA

Built 1963 Load: 39.9 t ADT: 275

PA 75; SR 0075

Poor

Over: BUCKS RUN

1.75 MI.N. OF GAP ROAD, Franklin, PA

Built 1953 Load: 40.8 t ADT: 3,037

US 30; Lincoln Hwy

Poor

Over: ROCKY MT CREEK

CALEDONIA, Franklin, PA

Built 1948 Load: 43.5 t ADT: 15,365

US 11; SR 0011

Poor

Over: Norfolk Southern RR

SHIPPENSBURG, Franklin, PA

Built 1937 Load: 62.6 t ADT: 9,489

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.