County profile · official public datasets

Indian River County, FL

120 public highway bridges tracked in the FHWA National Bridge Inventory: 75% rated Good, 23.3% Fair, 1.7% Poor.

120
Public bridges: 75%
Good condition: 1.7%
Poor condition

The verdict

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

Indian River County pairs a better-than-median Poor-condition share among rated counties in the state with a newer average build year than the state inventory.

Top 39%
lowest Poor share in state: 1.7%
Poor-condition share: 120
public highway bridges: 1989
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.

Indian River County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Indian River County ranks #26 of 67 Florida counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 1.7%). Indian River County, Florida contains 120 public highway bridges. Roughly 75% are rated “Good,” 23.3% “Fair,” and 1.7% “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

120

Public highway bridges in Indian River County

Good condition

75%

90 of 120 rated 7-9

Fair condition

23.3%

28 of 120 rated 5-6

Poor condition

1.7%

2 of 120 rated 4 or below

In-state Poor-share rank

#26 of 67

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

Condition distribution

Share of 120 NBI-tracked bridges by lowest applicable component rating.

Good

75% (90)

Fair

23.3% (28)

Poor

1.7% (2)

Indian River County's Poor-condition bridges carry 3,814 vehicle crossings a day

That is 0.4% of the county's reported daily bridge traffic on 1.7% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 1,907 crossings a day against 9,494 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 116 of 120 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.

37.5% of Indian River County's bridges have passed the 50-year mark

45 of the 120 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 75% 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 84.3% of the county's Poor-condition bridge traffic

SR-A1A over Sebastian Inlet, built 1964, carries 3,214 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 3,814 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.

1940s

1
1950s

8
1960s

29
1970s

10
1980s

3
1990s

16
2000s

26
2010s

21
2020s

6

What this shows Construction peaked in the 1960s, when 29 of the county's bridges still in the inventory were built, which is 24.2% of those with a recorded year. That cohort is now 55 to 64 years old in the 2024 inventory. Its average build year is 1989, 6 years newer than the Florida average of 1983.

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

The 5 Florida counties nearest Indian River County in number of bridges, with their condition splits. Its 1.7% Poor share is the 5th-lowest of these 6. Its average build year of 1989 against a peer-group mean of 1980 is 9 years newer.

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

Bridge inventory size and condition shares for Indian River County and the 5 Florida counties closest to it in inventory size
County	Bridges	Good	Fair	Poor	Avg. built
Gadsden County	121	25.6%	61.2%	13.2%	1980
Indian River County (this page)	120	75%	23.3%	1.7%	1989
Alachua County	115	52.2%	47%	0.9%	1971
Lake County	113	67.3%	32.7%	0%	1990
Columbia County	112	50.9%	48.2%	0.9%	1970
Sumter County	112	68.8%	31.3%	0%	1991

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

Similar inventory size

Nearest county inventories outside FL (120 bridges here).

Matanuska-Susitna County, AK · 120 bridges
Perry County, MO · 120 bridges
Schuyler County, MO · 120 bridges
Sanders County, MT · 120 bridges

Similar average build year

Nearest mean year-built outside FL (1989 here).

Harris County, TX · avg 1989 · 4,029 bridges
Mecklenburg County, NC · avg 1989 · 746 bridges
Buffalo County, NE · avg 1989 · 459 bridges
Brazos County, TX · avg 1989 · 370 bridges

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

All 120 Good 90 Fair 28 Poor 2

All bridges (120)

Sort:

Indian River County Bridge Snapshot

Condition distribution

Indian River County's Poor-condition bridges carry 3,814 vehicle crossings a day

37.5% of Indian River County's bridges have passed the 50-year mark

One structure carries 84.3% of the county's Poor-condition bridge traffic

How Indian River 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 (120)

SR91 SB TPK 180.16

SR91 NB TPK 180.16

34th Avenue

SR-60

5th Street SW

5th Street

CR-612 8th Street

1st St SW

4th Street

12th Street

SR-60 WB

SR-60 EB

SR-60 WB

SR-60 EB

CR-615 (66th Ave)

CR-609 (82nd Ave.)

CR-603-IND RIV BLV

Oslo Rd (CR-606)

CR-619 82ND AVE.

SR-A1A

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