US Bridges

I-375 over ALT-19 15th & 16th ST

Fair

Pinellas County, Florida · 0.2MI East of I-275 · Structure no. 150159

Built
1977
48 years old
Condition
Fair
inspected November 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
1,014 ft
1 main span
Daily traffic
17,000
2024 count
Owner
State
State Highway Agency

About this bridge

I-375 over ALT-19 15th & 16th ST is a steel stringer/multi-beam or girder carrying I-375 over ALT-19 15th & 16th 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 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 17,000 vehicles a day, roughly 3% of them trucks, projected to reach 29,495 by 2044. The structure is 1,014 ft (309.2 m) long and 55 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesI-375
CrossesALT-19 15th & 16th ST
Location0.2MI East of I-275
RouteInterstate 375
CountyPinellas County
StateFlorida
Coordinates27.77731, -82.65492
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.
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 geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating61.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1 (+11 approach)
Design loadHS 20
Structure length1,014 ft (309.2 m)
Longest span150 ft (45.6 m)
Deck width55 ft (16.9 m)
Roadway width53 ft (16.1 m)
Vertical clearance over deck18 ft (5.5 m)

Traffic and service

Average daily traffic17,000 (2024)
Projected traffic29,495 by 2044
Trucks3%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed0.6 mi (1 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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost$73,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-375 over ALT-19 15th & 16th ST built?

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

What condition is I-375 over ALT-19 15th & 16th 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 November 2024.

How much traffic does I-375 over ALT-19 15th & 16th ST carry?

About 17,000 vehicles per day (2024 count), of which roughly 3% are trucks.

How long is I-375 over ALT-19 15th & 16th ST?

The structure is 1,014 ft (309.2 m) long with a longest span of 150 ft (45.6 m) and a deck 55 ft wide.

Who owns I-375 over ALT-19 15th & 16th ST?

It is owned by the State Highway Agency.