US Bridges

49th St. NB over Tampa Bay

Fair

Pinellas County, Florida · Between SR-686 & SR-60 · Structure no. 154259

Built
1993
32 years old
Condition
Fair
inspected February 2025
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
14,010 ft
95 main spans
Daily traffic
68,500
2025 count
Owner
County
County Highway Agency

About this bridge

49th St. NB over Tampa Bay is a prestressed concrete stringer/multi-beam or girder carrying 49th St. NB over Tampa Bay in Pinellas County, Florida. It was built in 1993, so it is 32 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 68,500 vehicles a day, roughly 7% of them trucks, projected to reach 118,848 by 2047. The structure is 14,010 ft (4,270.4 m) long and 43 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

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Carries49th St. NB
CrossesTampa Bay
LocationBetween SR-686 & SR-60
RouteCounty Highway 611
CountyPinellas County
StateFlorida
Coordinates27.94497, -82.70482
Functional classUrban Other Principal Arterial

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.
Channel and channel protection7 GoodSome minor problems.
Last inspectionFebruary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating55.8 US tons
Inventory rating31.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans95 (+115 approach)
Design loadHS 20
Structure length14,010 ft (4,270.4 m)
Longest span100 ft (30.5 m)
Deck width43 ft (13 m)
Roadway width40 ft (12.1 m)
Vertical clearance over deck18 ft (5.6 m)

Traffic and service

Average daily traffic68,500 (2025)
Projected traffic118,848 by 2047
Trucks7%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was 49th St. NB over Tampa Bay built?

It was built in 1993, making it 32 years old in 2025.

What condition is 49th St. NB over Tampa Bay 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 February 2025.

How much traffic does 49th St. NB over Tampa Bay carry?

About 68,500 vehicles per day (2025 count), of which roughly 7% are trucks.

How long is 49th St. NB over Tampa Bay?

The structure is 14,010 ft (4,270.4 m) long with a longest span of 100 ft (30.5 m) and a deck 43 ft wide.

Who owns 49th St. NB over Tampa Bay?

It is owned by the County Highway Agency.