County profile · official public datasets

Pinellas County, FL

435 public highway bridges tracked in the FHWA National Bridge Inventory: 63.7% rated Good, 34.5% Fair, 1.8% Poor.

435
Public bridges: 63.7%
Good condition: 1.8%
Poor condition

The verdict

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

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

Top 43%
lowest Poor share in state: 1.8%
Poor-condition share: 435
public highway bridges: 1983
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.

Pinellas County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Pinellas County ranks #29 of 67 Florida counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 1.8%). Pinellas County, Florida contains 435 public highway bridges. Roughly 63.7% are rated “Good,” 34.5% “Fair,” and 1.8% “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

435

Public highway bridges in Pinellas County

Good condition

63.7%

277 of 435 rated 7-9

Fair condition

34.5%

150 of 435 rated 5-6

Poor condition

1.8%

8 of 435 rated 4 or below

In-state Poor-share rank

#29 of 67

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

Condition distribution

Share of 435 NBI-tracked bridges by lowest applicable component rating.

Good

63.7% (277)

Fair

34.5% (150)

Poor

1.8% (8)

Pinellas County's Poor-condition bridges carry 40,746 vehicle crossings a day

That is 0.4% of the county's reported daily bridge traffic on 1.8% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 5,093 crossings a day against 25,467 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 434 of 435 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.

30.1% of Pinellas County's bridges have passed the 50-year mark

131 of the 435 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 63.7% 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 42.5% of the county's Poor-condition bridge traffic

BELCHER RD CR-501 over ALLENS CREEK, built 1974, carries 17,300 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 8-bridge count understates how much of the daily burden sits on a single crossing.

Share is of the 40,746 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.

1920s

17
1930s

1
1940s

5
1950s

30
1960s

50
1970s

81
1980s

73
1990s

87
2000s

48
2010s

27
2020s

16

What this shows Construction peaked in the 1990s, when 87 of the county's bridges still in the inventory were built, which is 20% of those with a recorded year. That cohort is now 25 to 34 years old in the 2024 inventory. Its average build year (1983) matches the Florida average (1983).

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

The 5 Florida counties nearest Pinellas County in number of bridges, with their condition splits. Its 1.8% Poor share is the 5th-lowest of these 6. Its average build year of 1983 against a peer-group mean of 1982 is in line with the group.

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

Bridge inventory size and condition shares for Pinellas County and the 5 Florida counties closest to it in inventory size
County	Bridges	Good	Fair	Poor	Avg. built
Palm Beach County	610	79.7%	20%	0.3%	1987
Pinellas County (this page)	435	63.7%	34.5%	1.8%	1983
Lee County	391	75.4%	23.8%	0.8%	1982
Collier County	370	73.2%	24.9%	1.9%	1981
Polk County	360	55.3%	44.7%	0%	1979
Sarasota County	298	57.7%	41.6%	0.7%	1982

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

Similar inventory size

Nearest county inventories outside FL (435 bridges here).

Clay County, MO · 436 bridges
Stoddard County, MO · 434 bridges
Butte County, CA · 437 bridges
Platte County, NE · 433 bridges

Similar average build year

Nearest mean year-built outside FL (1983 here).

Dallas County, TX · avg 1983 · 3,230 bridges
Bexar County, TX · avg 1983 · 2,342 bridges
Sedgwick County, KS · avg 1983 · 1,333 bridges
Will County, IL · avg 1983 · 649 bridges

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

All 435 Good 277 Fair 150 Poor 8

Good-condition bridges (277)

Sort:

Pinellas County Bridge Snapshot

Condition distribution

Pinellas County's Poor-condition bridges carry 40,746 vehicle crossings a day

30.1% of Pinellas County's bridges have passed the 50-year mark

One structure carries 42.5% of the county's Poor-condition bridge traffic

How Pinellas 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 (277)

I-275 SB

I-175 WB

I-275 NB

DRUID RD

CR611 MCMULLEN BTH

SR-690 WB EXP RAMP

CR-416 (CSWY BLVD)

11th Avenue South

US-19 (SR-55)

GANDY BLVD WB

TARPON LAKE BLVD

PIERCE STREET

ACCESS ROAD A

SR-686 WB

SR 687/4th Street

TARPON WOODS BLVD.

EAST LAKE DR CR-77

I-275SB-118TH AVE

I-275 NB

SR 694 WB

SR-580 EB

GANDY BLVD EB

CR-611 SB ON-RAMP

64TH ST NORTH

9TH ST SOUTH

I-275 SB

I-275 NB

CROSS CREEK WAY

US-19A

CR138/GULFPORT BVD

SR55 to SR690 Ramp

GANDY BLVD WB

SR-679

4TH STREET SOUTH

PARK ST NORTH SB

BRYAN DAIRY RD.

NURSERY ROAD

GANDY BLVD EB

I-275 SB

I-275 NB

58TH. ST. N

40th Ave NE

OAK CREEK DRIVE

I-275 NB

SR686A/Roosevelt W

ISLAND DRIVE

I-275 SB

I-275 SB

I-275 NB

SR-679

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