US Bridges

42nd ST South over Clam Bayou

Fair

Pinellas County, Florida · 230 Ft South of 18th Av S · Structure no. 157132

Built
1990
35 years old
Condition
Fair
inspected May 2023
Type
Culvert
Concrete
Length
28 ft
2 main spans
Daily traffic
797
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

42nd ST South over Clam Bayou is a concrete culvert carrying 42nd ST 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 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 797 vehicles a day, roughly 1% of them trucks, projected to reach 1,383 by 2042. The structure is 28 ft (8.5 m) long. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
Carries42nd ST South
CrossesClam Bayou
Location230 Ft South of 18th Av S
RouteCity Street 0
CountyPinellas County
StateFlorida
Coordinates27.75111, -82.69
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating57.5 US tons
Inventory rating34.5 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20
Structure length28 ft (8.5 m)
Longest span13 ft (3.9 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic797 (2023)
Projected traffic1,383 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 42nd ST South over Clam Bayou built?

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

What condition is 42nd ST South over Clam 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 42nd ST South over Clam Bayou carry?

About 797 vehicles per day (2023 count), of which roughly 1% are trucks.

How long is 42nd ST South over Clam Bayou?

The structure is 28 ft (8.5 m) long with a longest span of 13 ft (3.9 m).

Who owns 42nd ST South over Clam Bayou?

It is owned by the City or Municipal Highway Agency.