County profile · official public datasets

Suwannee County, FL

37 public highway bridges tracked in the FHWA National Bridge Inventory: 54.1% rated Good, 40.5% Fair, 5.4% Poor.

37
Public bridges: 54.1%
Good condition: 5.4%
Poor condition

The verdict

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

Suwannee 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.

51st
of 67 on Poor share: 5.4%
Poor-condition share: 37
public highway bridges: 1970
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.

Suwannee County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Suwannee County ranks #51 of 67 Florida counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 5.4%). Suwannee County, Florida contains 37 public highway bridges. Roughly 54.1% are rated “Good,” 40.5% “Fair,” and 5.4% “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

Public highway bridges in Suwannee County

Good condition

54.1%

20 of 37 rated 7-9

Fair condition

40.5%

15 of 37 rated 5-6

Poor condition

5.4%

2 of 37 rated 4 or below

In-state Poor-share rank

#51 of 67

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

Condition distribution

Share of 37 NBI-tracked bridges by lowest applicable component rating.

Good

54.1% (20)

Fair

40.5% (15)

Poor

5.4% (2)

Suwannee County's Poor-condition bridges carry 102 vehicle crossings a day

That is 0% of the county's reported daily bridge traffic on 5.4% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 51 crossings a day against 5,034 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 37 of 37 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.

83.8% of Suwannee County's bridges have passed the 50-year mark

31 of the 37 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 54.1% 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 50% of the county's Poor-condition bridge traffic

164TH STREET over LITTLE RIVER, built 1940, carries 51 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 102 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.

1940s

5
1950s

2
1960s

21
1970s

3
1980s

1
2000s

2
2010s

1
2020s

2

What this shows Construction peaked in the 1960s, when 21 of the county's bridges still in the inventory were built, which is 56.8% of those with a recorded year. That cohort is now 55 to 64 years old in the 2024 inventory. Its average build year is 1970, 13 years older than the Florida average of 1983.

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

The 5 Florida counties nearest Suwannee County in number of bridges, with their condition splits. Its 5.4% Poor share is the 3rd-lowest of these 6. Its average build year of 1970 against a peer-group mean of 1975 is 5 years older.

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

Bridge inventory size and condition shares for Suwannee County and the 5 Florida counties closest to it in inventory size
County	Bridges	Good	Fair	Poor	Avg. built
Calhoun County	49	24.5%	73.5%	2%	1971
Wakulla County	48	37.5%	50%	12.5%	1979
Franklin County	43	7%	51.2%	41.9%	1988
Suwannee County (this page)	37	54.1%	40.5%	5.4%	1970
Lafayette County	28	50%	42.9%	7.1%	1968
Union County	28	21.4%	78.6%	0%	1970

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

Similar inventory size

Nearest county inventories outside FL (37 bridges here).

Sitka City and County, AK · 37 bridges
Teton County, ID · 37 bridges
Dickinson County, MI · 37 bridges
Emmet County, MI · 37 bridges

Similar average build year

Nearest mean year-built outside FL (1970 here).

Hamilton County, OH · avg 1970 · 783 bridges
Yavapai County, AZ · avg 1970 · 543 bridges
Garfield County, OK · avg 1970 · 504 bridges
San Luis Obispo County, CA · avg 1970 · 401 bridges

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

All 37 Good 20 Fair 15 Poor 2

Good-condition bridges (20)

Sort:

Suwannee County Bridge Snapshot

Condition distribution

Suwannee County's Poor-condition bridges carry 102 vehicle crossings a day

83.8% of Suwannee County's bridges have passed the 50-year mark

One structure carries 50% of the county's Poor-condition bridge traffic

How Suwannee 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 (20)

CR 136

CR-137

FALMOUTH RD

I-10 WB (SR-8)

RIVER RD

US-129 (SR-249)

HOGAN RD

CR-136

CR-795

SR-136

I-10 WB SR-8

I-10 EB (SR-8)

180TH STREET

HOGAN ROAD

98TH TERRACE

CR 250

I-75 SB (SR-93)

I-75 NB (SR-93)

CR-417

MT. OLIVE RD.

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