US Bridges

45th Ave. South over Little Bayou

Fair

Pinellas County, Florida · 0.3MI East of 6th St. S · Structure no. 157197

Built
1961
64 years old, rebuilt 1999
Condition
Fair
inspected May 2023
Type
Slab
Concrete Continuous
Length
83 ft
3 main spans
Daily traffic
3,477
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

45th Ave. South over Little Bayou is a concrete continuous slab carrying 45th Ave. South over Little Bayou in Pinellas County, Florida. It was built in 1961 and reconstructed in 1999, so it is 64 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 3,477 vehicles a day, roughly 5% of them trucks, projected to reach 6,033 by 2042. The structure is 83 ft (25.3 m) long and 41 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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Carries45th Ave. South
CrossesLittle Bayou
Location0.3MI East of 6th St. S
RouteCity Street 0
CountyPinellas County
StateFlorida
Coordinates27.72764, -82.63552
Functional classUrban Local

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating46.7 US tons
Inventory rating28 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadUnknown
Structure length83 ft (25.3 m)
Longest span39 ft (11.9 m)
Deck width41 ft (12.5 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,477 (2023)
Projected traffic6,033 by 2042
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was 45th Ave. South over Little Bayou built?

It was built in 1961, making it 64 years old in 2025. It was reconstructed in 1999.

What condition is 45th Ave. South over Little Bayou 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 May 2023.

How much traffic does 45th Ave. South over Little Bayou carry?

About 3,477 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is 45th Ave. South over Little Bayou?

The structure is 83 ft (25.3 m) long with a longest span of 39 ft (11.9 m) and a deck 41 ft wide.

Who owns 45th Ave. South over Little Bayou?

It is owned by the City or Municipal Highway Agency.