US Bridges

4th Avenue over 29th Street Outfall

Good

Hillsborough County, Florida · 0.1 MI W/O CSX RR · Structure no. 105902

Built
1976
49 years old
Condition
Good
inspected February 2025
Type
Culvert
Concrete
Length
32 ft
3 main spans
Daily traffic
2,050
2025 count
Owner
City
City or Municipal Highway Agency

About this bridge

4th Avenue over 29th Street Outfall is a concrete culvert carrying 4th Avenue over 29th Street Outfall in Hillsborough County, Florida. It was built in 1976, so it is 49 years old, older 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 2,050 vehicles a day, roughly 8% of them trucks, projected to reach 3,557 by 2045. The structure is 32 ft (9.8 m) long. If it were closed, the detour would be 1.9 mi (3 km).

Carries4th Avenue
Crosses29th Street Outfall
Location0.1 MI W/O CSX RR
RouteCity Street 0
StateFlorida
Coordinates27.95806, -82.42743
Functional classUrban Collector

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 protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionFebruary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating45.7 US tons
Inventory rating27.4 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadUnknown
Structure length32 ft (9.8 m)
Longest span11 ft (3.4 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,050 (2025)
Projected traffic3,557 by 2045
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
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 4th Avenue over 29th Street Outfall built?

It was built in 1976, making it 49 years old in 2025.

What condition is 4th Avenue over 29th Street Outfall 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 February 2025.

How much traffic does 4th Avenue over 29th Street Outfall carry?

About 2,050 vehicles per day (2025 count), of which roughly 8% are trucks.

How long is 4th Avenue over 29th Street Outfall?

The structure is 32 ft (9.8 m) long with a longest span of 11 ft (3.4 m).

Who owns 4th Avenue over 29th Street Outfall?

It is owned by the City or Municipal Highway Agency.