US Bridges

I-175WB to I-275NB over 3rd 4th 5th Ave & 16 ST

Good

Pinellas County, Florida · I-175 at 16th ST S · Structure no. 150140

Built
1977
48 years old
Condition
Good
inspected November 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
1,952 ft
3 main spans
Daily traffic
7,100
2024 count
Owner
State
State Highway Agency

About this bridge

I-175WB to I-275NB over 3rd 4th 5th Ave & 16 ST is a steel continuous stringer/multi-beam or girder carrying I-175WB to I-275NB over 3rd 4th 5th Ave & 16 ST in Pinellas County, Florida. It was built in 1977, so it is 48 years old, older than the Florida average of 41.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 7,100 vehicles a day, roughly 7% of them trucks, projected to reach 12,318 by 2044. The structure is 1,952 ft (595 m) long and 43 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesI-175WB to I-275NB
Crosses3rd 4th 5th Ave & 16 ST
LocationI-175 at 16th ST S
RouteInterstate 175
CountyPinellas County
StateFlorida
Coordinates27.76685, -82.65729
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment7: Better than present minimum criteria
Operating rating57 US tons
Inventory rating48 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3 (+16 approach)
Design loadHS 20 + Mod
Structure length1,952 ft (595 m)
Longest span189 ft (57.7 m)
Deck width43 ft (13.2 m)
Roadway width41 ft (12.4 m)
Vertical clearance over deck16 ft (4.9 m)

Traffic and service

Average daily traffic7,100 (2024)
Projected traffic12,318 by 2044
Trucks7%
Lanes on structure2
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed5 mi (8 km)
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-175WB to I-275NB over 3rd 4th 5th Ave & 16 ST built?

It was built in 1977, making it 48 years old in 2025.

What condition is I-175WB to I-275NB over 3rd 4th 5th Ave & 16 ST in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in November 2024.

How much traffic does I-175WB to I-275NB over 3rd 4th 5th Ave & 16 ST carry?

About 7,100 vehicles per day (2024 count), of which roughly 7% are trucks.

How long is I-175WB to I-275NB over 3rd 4th 5th Ave & 16 ST?

The structure is 1,952 ft (595 m) long with a longest span of 189 ft (57.7 m) and a deck 43 ft wide.

Who owns I-175WB to I-275NB over 3rd 4th 5th Ave & 16 ST?

It is owned by the State Highway Agency.