County profile · official public datasets

Hillsborough County, FL

840 public highway bridges tracked in the FHWA National Bridge Inventory: 68.8% rated Good, 31% Fair, 0.2% Poor.

840
Public bridges
68.8%
Good condition
0.2%
Poor condition

The verdict

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

Hillsborough County posts a top-quartile lowest Poor-condition share among rated counties in the state across large county bridge inventory.

Top 19%
lowest Poor share in state
0.2%
Poor-condition share
840
public highway bridges
1985
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.

Hillsborough County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Hillsborough County ranks #13 of 67 Florida counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 0.2%). Hillsborough County, Florida contains 840 public highway bridges. Roughly 68.8% are rated “Good,” 31% “Fair,” and 0.2% “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

840

Public highway bridges in Hillsborough County

Good condition

68.8%

578 of 840 rated 7-9

Fair condition

31%

260 of 840 rated 5-6

Poor condition

0.2%

2 of 840 rated 4 or below

In-state Poor-share rank

#13 of 67

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

Condition distribution

Share of 840 NBI-tracked bridges by lowest applicable component rating.

Good
68.8% (578)
Fair
31% (260)
Poor
0.2% (2)

Hillsborough County's Poor-condition bridges carry 970 vehicle crossings a day

That is 0% of the county's reported daily bridge traffic on 0.2% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 485 crossings a day against 32,922 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 840 of 840 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.

29.8% of Hillsborough County's bridges have passed the 50-year mark

250 of the 840 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 68.8% 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 76.3% of the county's Poor-condition bridge traffic

NEWBERGER ROAD over KELL CREEK, built 1947, carries 740 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 970 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.

When Hillsborough County's bridges were built

840 bridges with a recorded construction year, grouped by decade

bridges

What this shows Construction peaked in the 1980s, when 163 of the county's bridges still in the inventory were built, which is 19.4% of those with a recorded year. That cohort is now 35 to 44 years old in the 2024 inventory. Its average build year (1985) matches the Florida average (1983).

Source FHWA National Bridge Inventory (year built) As of 2024 NBI release

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

The 5 Florida counties nearest Hillsborough County in number of bridges, with their condition splits. Its 0.2% Poor share is the 2nd-lowest of these 6. Its average build year of 1985 against a peer-group mean of 1986 is in line with the group.

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

Bridge inventory size and condition shares for Hillsborough County and the 5 Florida counties closest to it in inventory size
County Bridges Poor
Miami-Dade County 1,057 4.7%
Orange County 885 0.1%
Hillsborough County (this page) 840 0.2%
Duval County 831 1.8%
Broward County 686 1.9%
Palm Beach County 610 0.3%

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

Similar inventory size

Nearest county inventories outside FL (840 bridges here).

Similar average build year

Nearest mean year-built outside FL (1985 here).

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

All 840 Good 578 Fair 260 Poor 2

All bridges (840)

FALKENBURG RD.

Good

Over: DELANEY CREEK

0.4MI NORTH OF SR-618, Hillsborough, FL

Built 1999 Load: 59.8 t ADT: 20,400

I-75SB TO SR-582EB

Good

Over: SR-582 (FOWLER AVE.)

1.2MI NORTH OF US-301, Hillsborough, FL

Built 1985 Load: 59.9 t ADT: 7,100

Rainwood Meadows D

Good

Over: Wetland Conserv. Area

0.4 Mi N of 19th Ave NE, Hillsborough, FL

Built 2022 Load: 60.1 t ADT: 150

FAIRWAY BLVD.

Good

Over: FLAMINGO CANAL

0.1MI S OFAPOLLO BCH BLVD, Hillsborough, FL

Built 2008 Load: 60.4 t ADT: 5,240

I-75 SB TO SR582WB

Good

Over: I-75 NB TO SR582 WB

I-75 & SR-582 INTERCHANGE, Hillsborough, FL

Built 1985 Load: 60.8 t ADT: 5,800

SR618 SELMON EB

Good

Over: US-301 (SR-43)

1.1 MI WEST OF I-75, Hillsborough, FL

Built 2005 Load: 60.9 t ADT: 37,000

HEATHRIDGE DRIVE

Good

Over: ARMISTEAD CREEK

0.7 MI W OF BELLAMY ROAD, Hillsborough, FL

Built 1989 Load: 60.9 t ADT: 60

EUREKA SPRINGS RD.

Good

Over: TAMPA BYPASS CANAL

0.08MI East of Maple Lane, Hillsborough, FL

Built 1976 Load: 61.7 t ADT: 250

I-75SB TO SR-582

Good

Over: COWHOUSE CREEK

0.3MI NORTH OF SR-582, Hillsborough, FL

Built 1984 Load: 62.6 t ADT: 7,100

US-41 (SR-45)

Good

Over: DRAINAGE DITCH

0.25 MILE NORTH OF SR-60, Hillsborough, FL

Built 1965 Load: 62.7 t ADT: 36,500

FALKENBURG RD

Good

Over: LATERAL F CANAL

0.6MI N OF SELMON EXPY, Hillsborough, FL

Built 1999 Load: 62.8 t ADT: 20,700

SYMMES ROAD

Good

Over: BULLFROG CREEK

1.1MI W OF US-301, Hillsborough, FL

Built 2005 Load: 63.2 t ADT: 5,482

PROGRESS BLVD.

Good

Over: BLOOMINGDALE CREEK

0.8 MI WEST OF US-301, Hillsborough, FL

Built 1971 Load: 63.8 t ADT: 6,400

I-4 (SR-400) WB

Good

Over: CHARLIE TAYLOR RD

3.7 MI EAST OF SR-39, Hillsborough, FL

Built 1999 Load: 64.2 t ADT: 69,500

I-4 (SR-400) EB

Good

Over: CHARLIE TAYLOR RD

3.7 MI EAST OF SR-39, Hillsborough, FL

Built 1999 Load: 64.2 t ADT: 69,500

I-4 EB

Good

Over: PARK ROAD (SR-553)

1.2MI EAST OF SR-39, Hillsborough, FL

Built 1999 Load: 64.4 t ADT: 69,500

I75 SB TO SR582 EB

Good

Over: RAMP I75 NB TO SR582 WB

I-75 & SR-582 INTERCHANGE, Hillsborough, FL

Built 1985 Load: 65.3 t ADT: 7,100

SR-39 Alexander St

Good

Over: Westside Canal Tributary

0.2MI N/O I-4, Hillsborough, FL

Built 2013 Load: 66.6 t ADT: 8,200

I-4 (SR-400) WB

Good

Over: BRANCH FORBES ROAD

3.5MI EAST OF MCINTOSH RD, Hillsborough, FL

Built 1999 Load: 67.0 t ADT: 68,250

I-4 (SR-400) EB

Good

Over: BRANCH FORBES ROAD

3.5MI E OF MCINTOSH RD, Hillsborough, FL

Built 1999 Load: 67.0 t ADT: 68,250

WILLIAMS ROAD

Good

Over: RAMP A-1 & I-4

0.4MI NORTH OF US-92, Hillsborough, FL

Built 1984 Load: 67.5 t ADT: 2,500

US-92 WB RAMP G2

Good

Over: I-4 WB RAMP G3

0.5 MILES WEST OF US-301, Hillsborough, FL

Built 1999 Load: 67.6 t ADT: 22,500

SR-580 DALE MABRY

Good

Over: CURRIE CREEK

0.3 MILE NORTH OF US-92, Hillsborough, FL

Built 1963 Load: 68.1 t ADT: 64,000

SR-676

Good

Over: DELANEY CREEK

1.4 MI. WEST OF US-301, Hillsborough, FL

Built 2009 Load: 70.5 t ADT: 20,500

RAMP TO S. PARKING

Good

Over: T.I.A. RD.

1.1MI N OF SR-616, Hillsborough, FL

Built 1992 Load: 70.7 t ADT: 7,000

I-4 (SR-400) EB

Good

Over: ALEXANDER ST (CR-574)

1.6MI WEST OF SR-39, Hillsborough, FL

Built 1999 Load: 71.2 t ADT: 62,750

EAST BAY RD.

Good

Over: BULLFROG CREEK

0.7MI N OF SYMMES RD, Hillsborough, FL

Built 2004 Load: 74.0 t ADT: 4,200

SR 589 VET SB 9.3

Good

Over: CR 587 GUNN HWY

0.9 MI S OF EHRLICH ROAD, Hillsborough, FL

Built 1994 Load: 74.5 t ADT: 37,200

US-301 (SR-41)

Good

Over: DEAD RIVER

5.7 MILES NORTH OF CR-579, Hillsborough, FL

Built 1985 Load: 75.6 t ADT: 15,400

SR-60

Good

Over: CYPRESS CANAL

0.1 MI S OF CYPRESS ST, Hillsborough, FL

Built 1976 Load: 99.9 t ADT: 143,800

US-301 (SR-43)

Good

Over: BRUCE CREEK

0.4 MILE NORTH OF SR-60, Hillsborough, FL

Built 1973 Load: 99.9 t ADT: 39,000

SR 589 SCP 14.0

Good

Over: ROCKY CREEK

0.3MI N OF VETERANS EXPWY, Hillsborough, FL

Built 2000 Load: 99.9 t ADT: 55,000

COUNTRYWAY BLVD

Good

Over: COUNTRY CREEK

1.2MI N OF HILLSBORO AVE, Hillsborough, FL

Built 1986 Load: 99.9 t ADT: 8,400

NORTH STREET

Good

Over: DUG CREEK

0.6 MI S OF SYMMES ROAD, Hillsborough, FL

Built 1983 Load: 99.9 t ADT: 101

BETHLEHEM ROAD

Good

Over: PEMBERTON CREEK

0.5MI N OF US-92, Hillsborough, FL

Built 1999 Load: 99.9 t ADT: 500

FRITZKE ROAD

Good

Over: PEMBERTON CREEK

0.4MI N OF US-92, Hillsborough, FL

Built 1999 Load: 99.9 t ADT: 700

BOYETTE RD.

Good

Over: RICE CREEK

0.5MI EAST OF US-301, Hillsborough, FL

Built 2005 Load: 99.9 t ADT: 59,040

PALM RIVER ROAD

Good

Over: DELANEY CREEK

0.3MI E OF FALKENBURG RD, Hillsborough, FL

Built 2014 Load: 99.9 t ADT: 1,440

PHILLIPS LANE

Poor

Over: KITCHEN BRANCH

0.3 MI N OF KRACKER AVE, Hillsborough, FL

Built 1974 Load: 2.3 t ADT: 230

NEWBERGER ROAD

Poor

Over: KELL CREEK

0.2 MI EAST OF US-41, Hillsborough, FL

Built 1947 Load: 43.3 t ADT: 740

Read our methodology - how this data is sourced, computed, and verified.

Related

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Data sourced from official public datasets. See our methodology for details. Retrieved and formatted by PlainBridges

Every figure on PlainBridges is rendered directly from federal source data, no number is typed in by an editor. This page draws directly on federal source data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. NBI condition categories reflect the latest reported inventory record, not a live safety, closure, or travel decision.