County profile · official public datasets

Manassas city County, VA

13 public highway bridges tracked in the FHWA National Bridge Inventory: 30.8% rated Good, 69.2% Fair, 0% Poor.

13
Public bridges
30.8%
Good condition
0%
Poor condition

The verdict

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

Manassas city County pairs a top-quartile lowest Poor-condition share among rated counties in the state with a newer average build year than the state inventory.

Top 16%
lowest Poor share in state
0%
Poor-condition share
13
public highway bridges
1989
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.

Manassas city County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Manassas city County ranks #21 of 129 Virginia counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 0%). Manassas city County, Virginia contains 13 public highway bridges. Roughly 30.8% are rated “Good,” 69.2% “Fair,” and 0% “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

13

Public highway bridges in Manassas city County

Good condition

30.8%

4 of 13 rated 7-9

Fair condition

69.2%

9 of 13 rated 5-6

Poor condition

0%

0 of 13 rated 4 or below

In-state Poor-share rank

#21 of 129

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

Condition distribution

Share of 13 NBI-tracked bridges by lowest applicable component rating.

Good
30.8% (4)
Fair
69.2% (9)
Poor
0% (0)

15.4% of Manassas city County's bridges have passed the 50-year mark

2 of the 13 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 30.8% 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.

When Manassas city County's bridges were built

13 bridges with a recorded construction year, grouped by decade

bridges

What this shows Construction peaked in the 1990s, when 5 of the county's bridges still in the inventory were built, which is 38.5% of those with a recorded year. That cohort is now 25 to 34 years old in the 2024 inventory. Its average build year is 1989, 15 years newer than the Virginia average of 1974.

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

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

The 5 Virginia counties nearest Manassas city County in number of bridges, with their condition splits. Its 0% Poor share is the 1st-lowest of these 6. Its average build year of 1989 against a peer-group mean of 1974 is 15 years newer.

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

Bridge inventory size and condition shares for Manassas city County and the 5 Virginia counties closest to it in inventory size
County Bridges Poor
Northumberland County 16 6.3%
Norton city County 13 23.1%
Manassas city County (this page) 13 0%
Northampton County 12 8.3%
Williamsburg city County 12 8.3%
Martinsville city County 10 0%

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

Similar inventory size

Nearest county inventories outside VA (13 bridges here).

Similar average build year

Nearest mean year-built outside VA (1989 here).

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

Fair-condition bridges (9)

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.