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

All bridges (254)

VISITOR CENTER ROA

Good

Over: WETLANDS

0.7 MILES EAST OF TANEYTO, Adams, PA

Built 2008 Load: 32.7 t ADT: 100

SR 1015

Good

Over: TRIB CONEWAGO CREEK

1 MI.S.E. OF HEIDLERSBURG, Adams, PA

Built 1992 Load: 33.6 t ADT: 888

SR 3011

Good

Over: MARSH RUN

.5 MI N OF HILLTOWN, Adams, PA

Built 1991 Load: 33.6 t ADT: 3,313

Stoney Point Rd

Good

Over: Mud Run

1.5 MI S OF BERMUDIAN, Adams, PA

Built 1962 Load: 34.0 t ADT: 2,447

PA 116; SR 0116

Good

Over: WHITE RUN

3 MI. E. OF GETTYSBURG, Adams, PA

Built 2014 Load: 34.0 t ADT: 7,490

PA 116; SR 0116

Good

Over: SPRINGS RUN

2 MI. S. OF FAIRFIELD, Adams, PA

Built 1997 Load: 34.5 t ADT: 4,076

GUN CLUB RD

Good

Over: TRIB OF CONEWAGO CREEK

GUN CLUB ROAD BRIDGE, Adams, PA

Built 2006 Load: 34.5 t ADT: 50

MENGUS MILL ROAD

Good

Over: PINEY CREEK

1.5 S.LITLTWN;PINEY CREEK, Adams, PA

Built 2021 Load: 35.0 t ADT: 600

Horner Road T-402

Good

Over: Marsh Creek

2.5 MI SW of Barlow, Adams, PA

Built 2017 Load: 35.6 t ADT: 50

SR 0116

Good

Over: South Branch of Conewago

1/2 MI. W. OF BRUSHTOWN, Adams, PA

Built 2021 Load: 35.6 t ADT: 7,415

PA194/Hbg St

Good

Over: Conewago Creek

East Berlin, Adams, PA

Built 2009 Load: 36.0 t ADT: 3,879

PA 116; SR 0116

Good

Over: ROCK CREEK

GETTYSBURG, Adams, PA

Built 2012 Load: 36.0 t ADT: 7,355

SR 2009

Good

Over: TRIB TO CONEWAGO CREEK

1.5 MI N OF EDGEGROVE, Adams, PA

Built 2017 Load: 36.0 t ADT: 3,909

SR 4001

Good

Over: OPOSSUM CREEK

CENTRE MILLS, Adams, PA

Built 2018 Load: 36.0 t ADT: 1,703

PA 394; SR 0394

Good

Over: UNT to Rock Creek

1.25 MI. SE OF TABLE ROCK, Adams, PA

Built 2021 Load: 36.0 t ADT: 4,750

PA 234; SR 0234

Good

Over: Conewago Creek

W OF CULPS CORNERS, Adams, PA

Built 2021 Load: 36.6 t ADT: 354

SR 3005

Good

Over: WILLOUGHBY RUN

3 MI. S.W. OF GETTYSBURG, Adams, PA

Built 1963 Load: 36.9 t ADT: 569

SR 3008

Good

Over: MARSH CREEK

0.5 MI N OF GREENMOUNT, Adams, PA

Built 2013 Load: 37.3 t ADT: 200

SR 1015

Good

Over: Conewago Creek

0.5 MI NW NEW CHESTER, Adams, PA

Built 2023 Load: 37.9 t ADT: 2,137

PA 394; SR 0394

Good

Over: ROCK CREEK

2 3/4 MI.N.W. HUNTERSTOWN, Adams, PA

Built 1991 Load: 38.1 t ADT: 4,750

SR 3038

Good

Over: MARSH CREEK

MARSH CREEK/SEVEN STARS, Adams, PA

Built 2009 Load: 38.1 t ADT: 144

US 30; SR 0030

Good

Over: BEAVER CREEK

ABBOTTSTOWN, Adams, PA

Built 2017 Load: 38.2 t ADT: 16,199

SR 4010

Good

Over: CONEWAGO CREEK

3.5 MI.N.W. ARENDTSVILLE, Adams, PA

Built 2018 Load: 38.2 t ADT: 1,089

PA 234; SR 0234

Good

Over: CONEWAGO CREEK

ARENDTSVILLE, Adams, PA

Built 2013 Load: 38.6 t ADT: 3,578

SR 3001;OLD HBG RD

Good

Over: CONEWAGO CREEK

1 1/2 MI.S. HEIDLERSBURG, Adams, PA

Built 2016 Load: 38.6 t ADT: 1,473

Carlisle Road

Good

Over: BERMUDIAN CREEK

IDAVILLE, Adams, PA

Built 2017 Load: 38.6 t ADT: 2,961

SR 3017

Good

Over: Mud Run

3.25 MI.N.W. OF GETTYSBRG, Adams, PA

Built 2021 Load: 38.6 t ADT: 1,633

SR 3001; BUS. 15

Good

Over: MARSH CREEK

.5 MI S OF GREENMOUNT, Adams, PA

Built 2011 Load: 38.9 t ADT: 1,596

Table Rock Road

Good

Over: CONEWAGO CREEK

NORTH OF TABLE ROCK, Adams, PA

Built 2018 Load: 38.9 t ADT: 1,926

PA 116; SR 0116

Good

Over: Willoughby Run

Southwest of Gettysburg, Adams, PA

Built 2019 Load: 38.9 t ADT: 9,265

SR 1021

Good

Over: CONEWAGO CREEK

1 MI E OF NEW CHESTER, Adams, PA

Built 1987 Load: 39.0 t ADT: 436

OLD MILL ROAD

Good

Over: WILLOUGHBY RUN

1 W GBURG/WILLOUGHBY RUN, Adams, PA

Built 1967 Load: 39.0 t ADT: 600

SR 2012

Good

Over: ALLOWAY CREEK

3 MI.W.OF LITTLESTOWN, Adams, PA

Built 2006 Load: 39.0 t ADT: 275

PA 34; SR 0034

Good

Over: QUAKER RUN

1.5 MI.N. OF BIGLERVILLE, Adams, PA

Built 2012 Load: 39.2 t ADT: 4,598

SR 3001;OLD HBG RD

Good

Over: CONEWAGO CREEK

S OF HEIDLERSBURG, Adams, PA

Built 2016 Load: 39.2 t ADT: 1,473

Narrows Road

Good

Over: CONEWAGO CREEK

CULPS CORNERS, Adams, PA

Built 2018 Load: 39.2 t ADT: 354

SR 3015

Good

Over: Marsh Creek

1 MI N OF MCKNIGHTSTOWN, Adams, PA

Built 2015 Load: 39.5 t ADT: 344

York St (SR 30)

Good

Over: Rock Creek

GETTYSBURG, Adams, PA

Built 2019 Load: 39.5 t ADT: 14,416

US 15 NB; SR 0015

Good

Over: ROCK CREEK

SOUTH OF GETTYSBURG, Adams, PA

Built 1990 Load: 39.9 t ADT: 9,529

SR 3001; BUS. 15

Good

Over: ROCK CREEK

1/2 MI.N.OF GETTSBURG, Adams, PA

Built 2000 Load: 39.9 t ADT: 3,874

POPLAR HILL ROAD

Good

Over: MIDDLE CREEK

2.4 MI NW OF FAIRFIELD, Adams, PA

Built 2018 Load: 39.9 t ADT: 25

Cranberry Road

Good

Over: BERMUDIAN CREEK

VILLAGE OF LIMEROCK MILL, Adams, PA

Built 2016 Load: 40.2 t ADT: 505

Mt Tabor Rd

Good

Over: Opossum Creek

1/4 MI N OF BENDERSVILLE, Adams, PA

Built 2017 Load: 40.2 t ADT: 206

ABBOTTSTOWN PIKE

Good

Over: UNT TO BEAVER CREEK

ABBOTTSTOWN, Adams, PA

Built 2017 Load: 40.5 t ADT: 9,957

Aspers Benders Rd

Good

Over: OPOSSUM CREEK

ASPERS, Adams, PA

Built 2018 Load: 40.5 t ADT: 1,442

STONE JUG ROAD

Good

Over: CONEWAGO CREEK

2.5 MI.E OF BIGLERVILLE, Adams, PA

Built 1991 Load: 40.8 t ADT: 300

SR 3004

Good

Over: TRIB. MARSH CREEK

1.5 MI S. OF GREENMOUNT, Adams, PA

Built 1998 Load: 40.8 t ADT: 155

US 30 SR 0030

Good

Over: WILLOUGHBY RUN

1.5 MI.W.OF GETTYSBURG, Adams, PA

Built 2003 Load: 41.7 t ADT: 9,983

BIRCH RUN ROAD

Good

Over: BIRCH RUN

1.6 MI SW OF SR 4009, Adams, PA

Built 2019 Load: 42.1 t ADT: 25

SR 3001;OLD HBG RD

Good

Over: BERMUDIAN CREEK

2 MI.N. OF HEIDLERSBURG, Adams, PA

Built 2016 Load: 42.4 t ADT: 793

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.