Total bridges
70
Public highway bridges in Jefferson County
County profile · official public datasets
Jefferson County, FL
70 public highway bridges tracked in the FHWA National Bridge Inventory: 30% rated Good, 67.1% Fair, 2.9% Poor.
- 70
- Public bridges
- 30%
- Good condition
- 2.9%
- Poor condition
The verdict
According to the Federal Highway Administration's 2024 National Bridge Inventory.
Jefferson County pairs a higher-than-median Poor-condition share among rated counties in the state with an older average build year than the state inventory.
- 39th
- of 67 on Poor share
- 2.9%
- Poor-condition share
- 70
- public highway bridges
- 1976
- 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.
Jefferson County Bridge Snapshot
According to the Federal Highway Administration's 2024 National Bridge Inventory, Jefferson County ranks #39 of 67 Florida counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 2.9%). Jefferson County, Florida contains 70 public highway bridges. Roughly 30% are rated “Good,” 67.1% “Fair,” and 2.9% “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.
Good condition
30%
21 of 70 rated 7-9
Fair condition
67.1%
47 of 70 rated 5-6
Poor condition
2.9%
2 of 70 rated 4 or below
In-state Poor-share rank
#39 of 67
Among Florida counties with 5+ bridges, lower share ranks better
Condition distribution
Share of 70 NBI-tracked bridges by lowest applicable component rating.
Good 30% (21)
Fair 67.1% (47)
Poor 2.9% (2)
Jefferson County's Poor-condition bridges carry 2,000 vehicle crossings a day
That is 0.6% of the county's reported daily bridge traffic on 2.9% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 1,000 crossings a day against 4,641 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 70 of 70 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.
61.4% of Jefferson County's bridges have passed the 50-year mark
43 of the 70 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% 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 80% of the county's Poor-condition bridge traffic
CR 259 over SCL Railroad, built 1977, carries 1,600 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 2-bridge count understates how much of the daily burden sits on a single crossing.
Share is of the 2,000 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.
When Jefferson County's bridges were built
70 bridges with a recorded construction year, grouped by decade
- 1900s 1
1900–1909
1 bridges
- 1940s 2
1940–1949
2 bridges
- 1950s
1950–1959
17 bridges
- 1960s 5
1960–1969
5 bridges
- 1970s
1970–1979
22 bridges
- 1980s 4
1980–1989
4 bridges
- 1990s 8
1990–1999
8 bridges
- 2000s 5
2000–2009
5 bridges
- 2010s 3
2010–2019
3 bridges
- 2020s 3
2020–2029
3 bridges
What this shows Construction peaked in the 1970s, when 22 of the county's bridges still in the inventory were built, which is 31.4% of those with a recorded year. That cohort is now 45 to 54 years old in the 2024 inventory. Its average build year is 1976, 7 years older than the Florida average of 1983.
How Jefferson County compares with Florida's closest counties by inventory size
The 5 Florida counties nearest Jefferson County in number of bridges, with their condition splits. Its 2.9% Poor share is the 4th-lowest of these 6. Its average build year of 1976 against a peer-group mean of 1975 is in line with the group.
Showing the 5 closest of 66 Florida counties eligible for comparison.
| County | Bridges | Good | Fair | Poor | Avg. built |
|---|---|---|---|---|---|
| Liberty County | 77 | 19.5% | 66.2% | 14.3% | 1974 |
| Bradford County | 75 | 46.7% | 48% | 5.3% | 1976 |
| Levy County | 73 | 39.7% | 57.5% | 2.7% | 1973 |
| Putnam County | 73 | 45.2% | 52.1% | 2.7% | 1979 |
| Jefferson County (this page) | 70 | 30% | 67.1% | 2.9% | 1976 |
| Okeechobee County | 67 | 46.3% | 53.7% | 0% | 1973 |
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 Jefferson 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 Jefferson County, both outside Florida so the neighborhoods are not the same-state size table above.
Similar inventory size
Nearest county inventories outside FL (70 bridges here).
- Jasper County, GA · 70 bridges
- Treutlen County, GA · 70 bridges
- Turner County, GA · 70 bridges
- Power County, ID · 70 bridges
Similar average build year
Nearest mean year-built outside FL (1976 here).
- Marion County, IN · avg 1976 · 958 bridges
- Mohave County, AZ · avg 1976 · 641 bridges
- Comanche County, OK · avg 1976 · 593 bridges
- Prince George's County, MD · avg 1976 · 576 bridges
Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.
Poor-condition bridges (2)
Read our methodology - how this data is sourced, computed, and verified.
Related
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.