US Bridges

I-4 WB over SR-585 21st & 22nd ST

Fair

Hillsborough County, Florida · 1 MI E of I-275 · Structure no. 100658

Built
2005
20 years old
Condition
Fair
inspected June 2024
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete
Length
358 ft
3 main spans
Daily traffic
86,000
2022 count
Owner
State
State Highway Agency

About this bridge

I-4 WB over SR-585 21st & 22nd ST is a prestressed concrete box beam or girders - single or spread carrying I-4 WB over SR-585 21st & 22nd ST in Hillsborough County, Florida. It was built in 2005, so it is 20 years old, younger than the Florida average of 41.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 86,000 vehicles a day, roughly 11% of them trucks, projected to reach 149,210 by 2044. The structure is 358 ft (109 m) long and 74 ft wide.

Location

Open in Google Maps
CarriesI-4 WB
CrossesSR-585 21st & 22nd ST
Location1 MI E of I-275
RouteInterstate 585
CountyHillsborough County
StateFlorida
Coordinates27.96547, -82.43511
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating72.2 US tons
Inventory rating44.9 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length358 ft (109 m)
Longest span119 ft (36.3 m)
Deck width74 ft (22.7 m)
Roadway width71 ft (21.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic86,000 (2022)
Projected traffic149,210 by 2044
Trucks11%
Lanes on structure4
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed—
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-4 WB over SR-585 21st & 22nd ST built?

It was built in 2005, making it 20 years old in 2025.

What condition is I-4 WB over SR-585 21st & 22nd ST in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in June 2024.

How much traffic does I-4 WB over SR-585 21st & 22nd ST carry?

About 86,000 vehicles per day (2022 count), of which roughly 11% are trucks.

How long is I-4 WB over SR-585 21st & 22nd ST?

The structure is 358 ft (109 m) long with a longest span of 119 ft (36.3 m) and a deck 74 ft wide.

Who owns I-4 WB over SR-585 21st & 22nd ST?

It is owned by the State Highway Agency.