County profile · official public datasets

Madison County, FL

60 public highway bridges tracked in the FHWA National Bridge Inventory: 41.7% rated Good, 55% Fair, 3.3% Poor.

60
Public bridges: 41.7%
Good condition: 3.3%
Poor condition

The verdict

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

Madison 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.

42nd
of 67 on Poor share: 3.3%
Poor-condition share: 60
public highway bridges: 1968
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.

Madison County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Madison County ranks #42 of 67 Florida counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 3.3%). Madison County, Florida contains 60 public highway bridges. Roughly 41.7% are rated “Good,” 55% “Fair,” and 3.3% “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

Public highway bridges in Madison County

Good condition

41.7%

25 of 60 rated 7-9

Fair condition

55%

33 of 60 rated 5-6

Poor condition

3.3%

2 of 60 rated 4 or below

In-state Poor-share rank

#42 of 67

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

Condition distribution

Share of 60 NBI-tracked bridges by lowest applicable component rating.

Good

41.7% (25)

Fair

55% (33)

Poor

3.3% (2)

Madison County's Poor-condition bridges carry 21,600 vehicle crossings a day

That is 6.1% of the county's reported daily bridge traffic on 3.3% of its bridges: Poor-condition structures carry more traffic than their share of the inventory. Each Poor bridge averages 10,800 crossings a day against 4,017 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 60 of 60 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.

86.7% of Madison County's bridges have passed the 50-year mark

52 of the 60 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 41.7% 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 93.5% of the county's Poor-condition bridge traffic

I-10 SR-8 over PIDDLIN CREEK, built 1973, carries 20,200 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 21,600 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.

1910s

1
1920s

1
1940s

4
1950s

10
1960s

8
1970s

28
1980s

2
2000s

4
2010s

2

What this shows Construction peaked in the 1970s, when 28 of the county's bridges still in the inventory were built, which is 46.7% of those with a recorded year. That cohort is now 45 to 54 years old in the 2024 inventory. Its average build year is 1968, 15 years older than the Florida average of 1983.

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

The 5 Florida counties nearest Madison County in number of bridges, with their condition splits. Its 3.3% Poor share is the 5th-lowest of these 6. Its average build year of 1968 against a peer-group mean of 1974 is 6 years older.

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

Bridge inventory size and condition shares for Madison County and the 5 Florida counties closest to it in inventory size
County	Bridges	Good	Fair	Poor	Avg. built
Highlands County	63	47.6%	50.8%	1.6%	1972
Gulf County	62	19.4%	67.7%	12.9%	1973
Hamilton County	60	35%	63.3%	1.7%	1968
Hernando County	60	83.3%	16.7%	0%	1985
Madison County (this page)	60	41.7%	55%	3.3%	1968
Glades County	59	40.7%	59.3%	0%	1971

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

Similar inventory size

Nearest county inventories outside FL (60 bridges here).

Heard County, GA · 60 bridges
Jenkins County, GA · 60 bridges
Oconee County, GA · 60 bridges
Woodford County, KY · 60 bridges

Similar average build year

Nearest mean year-built outside FL (1968 here).

Montgomery County, PA · avg 1968 · 828 bridges
San Joaquin County, CA · avg 1968 · 644 bridges
Providence County, RI · avg 1968 · 476 bridges
Imperial County, CA · avg 1968 · 444 bridges

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

All 60 Good 25 Fair 33 Poor 2

Fair-condition bridges (33)

Sort:

Madison County Bridge Snapshot

Condition distribution

Madison County's Poor-condition bridges carry 21,600 vehicle crossings a day

86.7% of Madison County's bridges have passed the 50-year mark

One structure carries 93.5% of the county's Poor-condition bridge traffic

How Madison 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

Fair-condition bridges (33)

CR 146

I-10 WB (SR-8)

SR-6

I-10 EB (SR-8)

CR 146

NORTHEAST MYRRH ST

I-10 EB SR-8

US-221 (SR-55)

CR 150

US-221 (SR-55)

I-10 WB (SR-8)

US-19 (SR-20)

I-10 (SR-8)

CR 253

US-90 (SR-10)

I-10 WB (SR-8)

I-10 WB SR-8

I-10 EB (SR-8)

I-10 EB SR-8

CR 150

US-221 (SR-55)

US-221 (SR-55)

I-10 WB (SR-8)

CR 140

US-19 (SR-20)

CR 146

I-10 WB (SR-8)

I-10 EB (SR-8)

US-221 (SR-55)

CR 150

US-19 (SR-20)

I-10 (SR-8)

I-10 (SR-8)

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