County profile · official public datasets

Frederick County, VA

168 public highway bridges tracked in the FHWA National Bridge Inventory: 36.3% rated Good, 61.3% Fair, 2.4% Poor.

168
Public bridges: 36.3%
Good condition: 2.4%
Poor condition

The verdict

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

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

Top 40%
lowest Poor share in state: 2.4%
Poor-condition share: 168
public highway bridges: 1973
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.

Frederick County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Frederick County ranks #51 of 129 Virginia counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 2.4%). Frederick County, Virginia contains 168 public highway bridges. Roughly 36.3% are rated “Good,” 61.3% “Fair,” and 2.4% “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

168

Public highway bridges in Frederick County

Good condition

36.3%

61 of 168 rated 7-9

Fair condition

61.3%

103 of 168 rated 5-6

Poor condition

2.4%

4 of 168 rated 4 or below

In-state Poor-share rank

#51 of 129

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

Condition distribution

Share of 168 NBI-tracked bridges by lowest applicable component rating.

Good

36.3% (61)

Fair

61.3% (103)

Poor

2.4% (4)

Frederick County's Poor-condition bridges carry 24,312 vehicle crossings a day

That is 1.7% of the county's reported daily bridge traffic on 2.4% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 6,078 crossings a day against 5,229 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 168 of 168 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.

53% of Frederick County's bridges have passed the 50-year mark

89 of the 168 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 36.3% 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 57.5% of the county's Poor-condition bridge traffic

J KENNETH ROBINSON over WINCHESTER & WESTERN RR, built 1968, carries 13,969 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 4-bridge count understates how much of the daily burden sits on a single crossing.

Share is of the 24,312 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.

1910s

2
1920s

4
1930s

16
1940s

5
1950s

2
1960s

49
1970s

32
1980s

13
1990s

19
2000s

15
2010s

8
2020s

3

What this shows Construction peaked in the 1960s, when 49 of the county's bridges still in the inventory were built, which is 29.2% of those with a recorded year. That cohort is now 55 to 64 years old in the 2024 inventory. Its average build year (1973) matches the Virginia average (1974).

How Frederick County compares with Virginia's closest counties by inventory size

The 5 Virginia counties nearest Frederick County in number of bridges, with their condition splits. Its 2.4% Poor share is the 4th-lowest of these 6. Its average build year of 1973 against a peer-group mean of 1972 is in line with the group.

Showing the 5 closest of 128 Virginia counties eligible for comparison.

Bridge inventory size and condition shares for Frederick County and the 5 Virginia counties closest to it in inventory size
County	Bridges	Good	Fair	Poor	Avg. built
Franklin County	174	42.5%	55.2%	2.3%	1966
Frederick County (this page)	168	36.3%	61.3%	2.4%	1973
Wise County	165	24.2%	73.9%	1.8%	1974
Carroll County	161	41.6%	57.1%	1.2%	1971
Halifax County	161	36%	57.1%	6.8%	1976
Hanover County	161	19.9%	76.4%	3.7%	1975

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

Similar inventory size

Nearest county inventories outside VA (168 bridges here).

Wilcox County, AL · 168 bridges
Kings County, CA · 168 bridges
Carroll County, GA · 168 bridges
Clayton County, GA · 168 bridges

Similar average build year

Nearest mean year-built outside VA (1973 here).

Jefferson County, AL · avg 1973 · 1,068 bridges
Erie County, NY · avg 1973 · 906 bridges
Davidson County, TN · avg 1973 · 832 bridges
Lancaster County, PA · avg 1973 · 801 bridges

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

All 168 Good 61 Fair 103 Poor 4

All bridges (168)

Sort:

Frederick County Bridge Snapshot

Condition distribution

Frederick County's Poor-condition bridges carry 24,312 vehicle crossings a day

53% of Frederick County's bridges have passed the 50-year mark

One structure carries 57.5% of the county's Poor-condition bridge traffic

How Frederick County compares with Virginia's closest counties by inventory size

Nationwide counties with similar inventory size or average build year

Similar inventory size

Similar average build year

All bridges (168)

WARDENSVILLE PIKE

SINKING SPRINGS LN

FROMANS RD

JOHN MARSHALL HWY

BACK MOUNTAIN RD

N FREDERICK PK-SBL

SILER RD

CARPERS PIKE

N FREDERICK PK

WARDENSVILLE GRADE

SHAWNEE DR

CEDAR GROVE RD

SENSENY RD

CARPERS VALLEY RD

WARRIOR DR

BERRYVILLE PIKE

NORTHWESTRN PK-WBL

MILLWOOD PIKE- NBL

GAINESBORO RD

N FREDERICK PK-SBL

CEDAR LN

BACK MOUNTAIN RD

NORTHWESTRN PK-EBL

BACK CREEK RD

VALLEY PIKE

MERRIMANS LANE

FAIRFAX PIKE

SANDMINE RD

SENSENY ROAD

HARRY BYRD HWY-EBL

NORTHWESTRN PK-WBL

NORTH FREDERICK PK

WOODSTOCK LN

HOPEWELL RD

CEDAR HILL RD

I-81 NBL

N FREDERICK PK-SBL

N FREDERICK PK-NBL

SALEM CHURCH RD

J KENNETH ROBINSON

I-66 EBL (RAMP 2)

I-81 NBL

PAPERMILL RD

N FREDERICK PK-NBL

NORTHWESTRN PK-EBL

BRUSH CREEK RD

MIDDLE RD

J K ROBINSON - NBL

I-81 NBL

I-81 SBL

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