County profile · official public datasets

Adams County, PA

254 public highway bridges tracked in the FHWA National Bridge Inventory: 36.2% rated Good, 57.1% Fair, 6.7% Poor.

254
Public bridges
36.2%
Good condition
6.7%
Poor condition

The verdict

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

Adams County posts a top-quartile lowest Poor-condition share among rated counties in the state across mid-size county bridge inventory.

Top 15%
lowest Poor share in state
6.7%
Poor-condition share
254
public highway bridges
1972
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.

Adams County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Adams County ranks #10 of 67 Pennsylvania counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 6.7%). Adams County, Pennsylvania contains 254 public highway bridges. Roughly 36.2% are rated “Good,” 57.1% “Fair,” and 6.7% “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

254

Public highway bridges in Adams County

Good condition

36.2%

92 of 254 rated 7-9

Fair condition

57.1%

145 of 254 rated 5-6

Poor condition

6.7%

17 of 254 rated 4 or below

In-state Poor-share rank

#10 of 67

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

Condition distribution

Share of 254 NBI-tracked bridges by lowest applicable component rating.

Good
36.2% (92)
Fair
57.1% (145)
Poor
6.7% (17)

Adams County's Poor-condition bridges carry 16,457 vehicle crossings a day

That is 2.2% of the county's reported daily bridge traffic on 6.7% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 968 crossings a day against 3,222 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 254 of 254 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.

55.5% of Adams County's bridges have passed the 50-year mark

141 of the 254 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 36.2% 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 27.4% of the county's Poor-condition bridge traffic

PA 34; SR 0034 over CONEWAGO CREEK, built 1920, carries 4,513 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 17-bridge count understates how much of the daily burden sits on a single crossing.

Share is of the 16,457 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.

When Adams County's bridges were built

254 bridges with a recorded construction year, grouped by decade

bridges

What this shows Construction peaked in the 1960s, when 48 of the county's bridges still in the inventory were built, which is 18.9% of those with a recorded year. That cohort is now 55 to 64 years old in the 2024 inventory. Its average build year (1972) matches the Pennsylvania average (1970).

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

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

The 5 Pennsylvania counties nearest Adams County in number of bridges, with their condition splits. Its 6.7% Poor share is the 1st-lowest of these 6. Its average build year of 1972 against a peer-group mean of 1970 is in line with the group.

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

Bridge inventory size and condition shares for Adams County and the 5 Pennsylvania counties closest to it in inventory size
County Bridges Poor
Columbia County 271 10%
Lawrence County 265 11.3%
Armstrong County 263 8%
Wayne County 259 31.3%
Adams County (this page) 254 6.7%
Huntingdon County 238 10.9%

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

Similar inventory size

Nearest county inventories outside PA (254 bridges here).

Similar average build year

Nearest mean year-built outside PA (1972 here).

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

All 254 Good 92 Fair 145 Poor 17

Fair-condition bridges (145)

W.HIGH STREET

Fair

Over: CSX TRANSPORTATION

HIGH ST.CSXT RR N OXF BOR, Adams, PA

Built 1920 Load: 10.9 t ADT: 250

RUSSELL TAVERN RD

Fair

Over: CONEWAGO CREEK

2 SE ARENDTSVILLE/CONEWAG, Adams, PA

Built 1974 Load: 12.7 t ADT: 300

BERMUDIAN CR. ROAD

Fair

Over: BERMUDIAN CREEK

1.6NE SGL#249/BERMUD CRK, Adams, PA

Built 1973 Load: 12.7 t ADT: 150

FLESHMAN MILL RD

Fair

Over: CONEWAGO CREEK

.7NW N.OXFRD CNWG CR.BRDR, Adams, PA

Built 1958 Load: 13.6 t ADT: 200

US 15 SB; SR 0015

Fair

Over: CSX

2 MI. N.E. GETTYSBURG, Adams, PA

Built 1963 Load: 14.5 t ADT: 8,489

STONE JUG ROAD

Fair

Over: OPOSSUM CREEK

2.5 MI.EBIGVLELERVILLE/OP, Adams, PA

Built 1983 Load: 14.5 t ADT: 300

BOYLE ROAD

Fair

Over: FLAT RUN

4.5 MI.SE OF FAIRFIELD, Adams, PA

Built 1941 Load: 14.5 t ADT: 200

WATERWORKS ROAD

Fair

Over: WILLOUGHBY RUN

IMMEDIATELY WEST OF RED R, Adams, PA

Built 1930 Load: 14.5 t ADT: 1

SR 3003

Fair

Over: US 15; SR 0015

2 1/2 MI. N.E. GETTYSBURG, Adams, PA

Built 1963 Load: 15.4 t ADT: 1,118

B & F ROAD

Fair

Over: CONEWAGO CREEK

1.7 SE ARENDTSVIL/CONEWAG, Adams, PA

Built 1911 Load: 15.4 t ADT: 100

PA 394; SR 0394

Fair

Over: US 15; SR 0015

W. OF HUNTERSTOWN, Adams, PA

Built 1963 Load: 16.3 t ADT: 3,688

BULLFROG ROAD

Fair

Over: SPRING RUN

E 1 FAIRFIELD/SPRING RUN, Adams, PA

Built 1940 Load: 16.3 t ADT: 450

US 15 NB; SR 0015

Fair

Over: CONEWAGO CREEK

S OF HEIDLERSBURG, Adams, PA

Built 1967 Load: 17.2 t ADT: 8,630

US 15 SB; SR 0015

Fair

Over: BERMUDIAN CREEK

N OF HEIDLERSBURG, Adams, PA

Built 1967 Load: 17.2 t ADT: 8,489

PA 134; SR 0134

Fair

Over: US 15; SR 0015

4 MI. S. OF GETTYSBURG, Adams, PA

Built 1963 Load: 17.2 t ADT: 1,989

SR 3004

Fair

Over: US 15; SR 0015

2.75 MI. N. MD. LINE, Adams, PA

Built 1963 Load: 17.2 t ADT: 155

RANCH TRAIL

Fair

Over: FRIENDS CREEK

CARROLL VALLEY BOROUGH, Adams, PA

Built 1980 Load: 19.1 t ADT: 200

US 15 SB; SR 0015

Fair

Over: CONEWAGO CREEK

2 MI. S. OF HEIDLERSBURG, Adams, PA

Built 1967 Load: 20.9 t ADT: 8,489

US 30; YORK RD.

Fair

Over: US 15; SR 0015

E OF GETTYSBURG, Adams, PA

Built 1963 Load: 21.8 t ADT: 16,182

PA 234; SR 0234

Fair

Over: MARKLE RUN

1MI NE OF HAMPTON, Adams, PA

Built 1930 Load: 21.8 t ADT: 6,406

SR 1009

Fair

Over: SR 0015 ; US 15

2 MI. N. OF HEIDLERSBURG, Adams, PA

Built 1968 Load: 22.7 t ADT: 420

US 15 NB; SR 0015

Fair

Over: BERMUDIAN CREEK

2 MI N OF HEIDLERSBURG, Adams, PA

Built 1967 Load: 23.6 t ADT: 8,630

SR 1016

Fair

Over: UPPER BERMUDIAN CREEK

BREAM MILL, Adams, PA

Built 1938 Load: 23.6 t ADT: 187

SR 2009

Fair

Over: PLUM CREEK

EDGE GROVE, Adams, PA

Built 1941 Load: 23.6 t ADT: 3,158

SR 2014

Fair

Over: PINEY CREEK

1 MI. E. OF KINGSDALE, Adams, PA

Built 1963 Load: 23.6 t ADT: 771

ORCHARD ROAD

Fair

Over: OPOSSUM CREEK

1.5 SE BENDRSVILL/OPOSSUM, Adams, PA

Built 1956 Load: 23.6 t ADT: 100

T-530; WOODSIDE RD

Fair

Over: US 15; SR 0015

NE OF GETTYSBURG, Adams, PA

Built 1967 Load: 24.5 t ADT: 468

PA 94; SR 0094

Fair

Over: BERMUDIAN CREEK

.5 MI SE OF YORK SPRINGS, Adams, PA

Built 1927 Load: 24.5 t ADT: 8,251

SR 1020

Fair

Over: TRIB BERMUDIAN CREEK

GARGOL, Adams, PA

Built 1953 Load: 24.5 t ADT: 1,128

BLACKHORSE TAV. RD

Fair

Over: WILLOUGHBY RUN

3 MI.SW GBRG.WILLOUGBY RN, Adams, PA

Built 1966 Load: 24.5 t ADT: 200

SCHRIVER ROAD

Fair

Over: PLUM RUN

4.5 MI.SE OF GETTYSBURG, Adams, PA

Built 1939 Load: 24.5 t ADT: 75

BULL FROG RUN ROAD

Fair

Over: MIDDLE CREEK

1.5 MI.E OF FAIRFIELD, Adams, PA

Built 1968 Load: 24.5 t ADT: 450

US 15 SB; SR 0015

Fair

Over: MARSH CREEK

2 MI. N. OF MARYLAND LINE, Adams, PA

Built 1963 Load: 25.4 t ADT: 9,517

SR 2006

Fair

Over: PLUM CREEK

1 MI S OF MCSHERRYSTOWN, Adams, PA

Built 1957 Load: 25.4 t ADT: 3,635

SOLOMON ROAD

Fair

Over: ROCK CREEK

4 SE OF GBURG/ROCK CREEK, Adams, PA

Built 1977 Load: 25.4 t ADT: 100

US 15 SB; SR 0015

Fair

Over: ROCK CREEK

S OF GETTYSBURG, Adams, PA

Built 1963 Load: 26.3 t ADT: 9,517

BOYDS SCHOOL ROAD

Fair

Over: ROCK CREEK

1.5N GETTYSBURG/ROCK CRK., Adams, PA

Built 1971 Load: 27.2 t ADT: 1,000

PA 134; SR 0134

Fair

Over: PLUM RUN

N OF BARLOW, Adams, PA

Built 1929 Load: 28.1 t ADT: 2,924

SR 2015

Fair

Over: SWIFT RUN

N.W. OF NEW OXFORD, Adams, PA

Built 1965 Load: 28.1 t ADT: 685

T-502; SR 4013

Fair

Over: CONEWAGO CREEK

1 MI NE OF TABLE ROCK, Adams, PA

Built 1985 Load: 28.1 t ADT: 184

MCGAUGHLIN ROAD

Fair

Over: MIDDLE CREEK

2 SE FAIRFIELD/MIDDLE CRK, Adams, PA

Built 1904 Load: 28.1 t ADT: 75

PLUM RUN ROAD

Fair

Over: PLUM RUN

PLUM RUN ROAD BRIDGE, Adams, PA

Built 1993 Load: 28.1 t ADT: 500

PA 116; SR 0116

Fair

Over: MIDDLE CREEK

FAIRFIELD, Adams, PA

Built 1954 Load: 29.0 t ADT: 6,265

PA 234; SR 0234

Fair

Over: CONEWAGO CREEK

BRIDGEPORT, Adams, PA

Built 1932 Load: 29.0 t ADT: 1,685

SR 2014

Fair

Over: ALLOWAY CREEK

0.5 MI. N. OF MD. LINE, Adams, PA

Built 1954 Load: 29.0 t ADT: 939

WINDING ROAD

Fair

Over: CONEWAGO CREEK

1.5 NW ARENDTSVIL/CONEWAG, Adams, PA

Built 1978 Load: 29.0 t ADT: 75

BALTIMORE RD

Fair

Over: BERMUDIAN CREEK

1SE YORK SPRG/BERMUDN CR., Adams, PA

Built 1938 Load: 29.0 t ADT: 150

SALEM CHURCH RD

Fair

Over: TRIB OF SWIFT RUN

1.5 GULDENS TR.SWIFT RUN, Adams, PA

Built 1950 Load: 29.0 t ADT: 50

T-417; SACHS RD

Fair

Over: US 15 SB; SR 0015

S OF GETTYSBURG, Adams, PA

Built 1963 Load: 29.9 t ADT: 138

PA 116; SR 0116

Fair

Over: TRIB TO MARSH CREEK

2 MI. S. OF KNOXLYN, Adams, PA

Built 1927 Load: 29.9 t ADT: 3,987

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.