US Bridges

14th Ave. South over Clam Bayou

Good

Pinellas County, Florida · 50FT. E of 44th St. South · Structure no. 157137

Built
1990
35 years old
Condition
Good
inspected May 2023
Type
Culvert
Concrete
Length
22 ft
2 main spans
Daily traffic
677
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

14th Ave. South over Clam Bayou is a concrete culvert carrying 14th Ave. South over Clam Bayou in Pinellas County, Florida. It was built in 1990, so it is 35 years old, younger 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 677 vehicles a day, roughly 1% of them trucks, projected to reach 1,175 by 2042. The structure is 22 ft (6.7 m) long. If it were closed, the detour would be 1.9 mi (3 km).

Location

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Carries14th Ave. South
CrossesClam Bayou
Location50FT. E of 44th St. South
RouteCity Street 0
CountyPinellas County
StateFlorida
Coordinates27.75651, -82.6927
Functional classUrban Local

Condition and inspection

Good

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

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert7 GoodSome minor problems.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating54 US tons
Inventory rating32.6 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20
Structure length22 ft (6.7 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic677 (2023)
Projected traffic1,175 by 2042
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.9 mi (3 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 14th Ave. South over Clam Bayou built?

It was built in 1990, making it 35 years old in 2025.

What condition is 14th Ave. South over Clam Bayou 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 May 2023.

How much traffic does 14th Ave. South over Clam Bayou carry?

About 677 vehicles per day (2023 count), of which roughly 1% are trucks.

How long is 14th Ave. South over Clam Bayou?

The structure is 22 ft (6.7 m) long with a longest span of 10 ft (3 m).

Who owns 14th Ave. South over Clam Bayou?

It is owned by the City or Municipal Highway Agency.