County profile · official public datasets

Jackson County, FL

146 public highway bridges tracked in the FHWA National Bridge Inventory: 21.2% rated Good, 71.2% Fair, 7.5% Poor.

146
Public bridges: 21.2%
Good condition: 7.5%
Poor condition

The verdict

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

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

56th
of 67 on Poor share: 7.5%
Poor-condition share: 146
public highway bridges: 1982
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.

Jackson County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Jackson County ranks #56 of 67 Florida counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 7.5%). Jackson County, Florida contains 146 public highway bridges. Roughly 21.2% are rated “Good,” 71.2% “Fair,” and 7.5% “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

146

Public highway bridges in Jackson County

Good condition

21.2%

31 of 146 rated 7-9

Fair condition

71.2%

104 of 146 rated 5-6

Poor condition

7.5%

11 of 146 rated 4 or below

In-state Poor-share rank

#56 of 67

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

Condition distribution

Share of 146 NBI-tracked bridges by lowest applicable component rating.

Good

21.2% (31)

Fair

71.2% (104)

Poor

7.5% (11)

Jackson County's Poor-condition bridges carry 25,589 vehicle crossings a day

That is 5.2% of the county's reported daily bridge traffic on 7.5% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 2,326 crossings a day against 4,363 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 146 of 146 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.

24.7% of Jackson County's bridges have passed the 50-year mark

36 of the 146 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 21.2% 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 91.8% of the county's Poor-condition bridge traffic

US90 SR10 over Chipola River, built 1943, carries 23,500 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 11-bridge count understates how much of the daily burden sits on a single crossing.

Share is of the 25,589 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.

1930s

2
1940s

7
1950s

11
1960s

12
1970s

31
1980s

11
1990s

59
2000s

11
2010s

1
2020s

1

What this shows Construction peaked in the 1990s, when 59 of the county's bridges still in the inventory were built, which is 40.4% of those with a recorded year. That cohort is now 25 to 34 years old in the 2024 inventory. Its average build year (1982) matches the Florida average (1983).

How Jackson County compares with Florida's closest counties by inventory size

The 5 Florida counties nearest Jackson County in number of bridges, with their condition splits. Its 7.5% Poor share is the 4th-lowest of these 6. Its average build year of 1982 against a peer-group mean of 1987 is 5 years older.

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

Bridge inventory size and condition shares for Jackson County and the 5 Florida counties closest to it in inventory size
County	Bridges	Good	Fair	Poor	Avg. built
Holmes County	156	30.8%	51.3%	17.9%	1987
Pasco County	151	81.5%	17.2%	1.3%	1994
St. Lucie County	151	74.8%	22.5%	2.6%	1981
Jackson County (this page)	146	21.2%	71.2%	7.5%	1982
St. Johns County	141	61%	37.6%	1.4%	1988
Bay County	130	30.8%	59.2%	10%	1984

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

Similar inventory size

Nearest county inventories outside FL (146 bridges here).

Dixon County, NE · 146 bridges
Frio County, TX · 146 bridges
La Salle County, TX · 146 bridges
Barren County, KY · 147 bridges

Similar average build year

Nearest mean year-built outside FL (1982 here).

Oklahoma County, OK · avg 1982 · 1,216 bridges
Jackson County, MO · avg 1982 · 930 bridges
Milwaukee County, WI · avg 1982 · 893 bridges
Champaign County, IL · avg 1982 · 727 bridges

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

All 146 Good 31 Fair 104 Poor 11

Good-condition bridges (31)

Sort:

Jackson County Bridge Snapshot

Condition distribution

Jackson County's Poor-condition bridges carry 25,589 vehicle crossings a day

24.7% of Jackson County's bridges have passed the 50-year mark

One structure carries 91.8% of the county's Poor-condition bridge traffic

How Jackson County compares with Florida's closest counties by inventory size

Nationwide counties with similar inventory size or average build year

Similar inventory size

Similar average build year

Good-condition bridges (31)

CR 169

SR73

SR69

CR 164

CR 280

US90 SR10

SR73

SR73

SR71

US90 SR10

SR73

CR275

US231 SR75

SR71

SR73

SR273

CR 167-Old US Road

US231 SR75

US231 SR75

I10 SR8

I10 SR8

SR77

SR77

SR71

SR2

SR77

US90 SR10

US90 SR10

SR2

County Line Road

SR69

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