County profile · official public datasets

Union County, FL

28 public highway bridges tracked in the FHWA National Bridge Inventory: 21.4% rated Good, 78.6% Fair, 0% Poor.

28
Public bridges: 21.4%
Good condition: 0%
Poor condition

The verdict

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

Union County pairs a top-quartile lowest Poor-condition share among rated counties in the state with an older average build year than the state inventory.

Top 15%
lowest Poor share in state: 0%
Poor-condition share: 28
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.

Union County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Union County ranks #10 of 67 Florida counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 0%). Union County, Florida contains 28 public highway bridges. Roughly 21.4% are rated “Good,” 78.6% “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

Public highway bridges in Union County

Good condition

21.4%

6 of 28 rated 7-9

Fair condition

78.6%

22 of 28 rated 5-6

Poor condition

0 of 28 rated 4 or below

In-state Poor-share rank

#10 of 67

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

Condition distribution

Share of 28 NBI-tracked bridges by lowest applicable component rating.

Good

21.4% (6)

Fair

78.6% (22)

Poor

0% (0)

71.4% of Union County's bridges have passed the 50-year mark

20 of the 28 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 21.4% 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.

1930s

1
1950s

12
1960s

4
1970s

3
1980s

2
1990s

1
2000s

4
2020s

1

What this shows Construction peaked in the 1950s, when 12 of the county's bridges still in the inventory were built, which is 42.9% of those with a recorded year. That cohort is now 65 to 74 years old in the 2024 inventory. Its average build year is 1970, 13 years older than the Florida average of 1983.

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

The 5 Florida counties nearest Union 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 1970 against a peer-group mean of 1973 is in line with the group.

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

Bridge inventory size and condition shares for Union County and the 5 Florida counties closest to it in inventory size
County	Bridges	Good	Fair	Poor	Avg. built
Wakulla County	48	37.5%	50%	12.5%	1979
Franklin County	43	7%	51.2%	41.9%	1988
Suwannee County	37	54.1%	40.5%	5.4%	1970
Lafayette County	28	50%	42.9%	7.1%	1968
Union County (this page)	28	21.4%	78.6%	0%	1970
Gilchrist County	10	30%	70%	0%	1959

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

Similar inventory size

Nearest county inventories outside FL (28 bridges here).

Crowley County, CO · 28 bridges
Dolores County, CO · 28 bridges
Lanier County, GA · 28 bridges
Luce County, MI · 28 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 28 Good 6 Fair 22 Poor 0

All bridges (28)

Sort:

Union County Bridge Snapshot

Condition distribution

71.4% of Union County's bridges have passed the 50-year mark

How Union 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

All bridges (28)

CR 240

CR 125

SR-100

SR-100

CR 18

CR 238A-SW 107 AVE

Sapp Cemetery Rd.

SR-121

CR 229

SR-121

SR-100

SR-100

SR-121

SR-100

SR-121

SR-238

SW 63rd Drive

CR 239

SR-16

SW CR 231A

CR 239A

CR 239A

CR 241

CR 229

CR 231

N. CR 231

CR 239A

SR-16

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