US Bridges

SR-39 over Heron Branch

Good

Hillsborough County, Florida · 8.8 MI North of I-4 · Structure no. 100038

Built
1941
84 years old, rebuilt 1987
Condition
Good
inspected July 2024
Type
Culvert
Concrete
Length
31 ft
3 main spans
Daily traffic
13,000
2024 count
Owner
State
State Highway Agency

About this bridge

SR-39 over Heron Branch is a concrete culvert carrying SR-39 over Heron Branch in Hillsborough County, Florida. It was built in 1941 and reconstructed in 1987, so it is 84 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 13,000 vehicles a day, roughly 16% of them trucks, projected to reach 16,250 by 2044. The structure is 31 ft (9.6 m) long. If it were closed, the detour would be 11.2 mi (18 km).

CarriesSR-39
CrossesHeron Branch
Location8.8 MI North of I-4
RouteState Highway 39
StateFlorida
Coordinates28.16033, -82.15392
Functional classRural Principal Arterial - Other

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 inspectionJuly 2024
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 rating69.6 US tons
Inventory rating41.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadH 15
Structure length31 ft (9.6 m)
Longest span10 ft (3.2 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic13,000 (2024)
Projected traffic16,250 by 2044
Trucks16%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.2 mi (18 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 SR-39 over Heron Branch built?

It was built in 1941, making it 84 years old in 2025. It was reconstructed in 1987.

What condition is SR-39 over Heron Branch 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 July 2024.

How much traffic does SR-39 over Heron Branch carry?

About 13,000 vehicles per day (2024 count), of which roughly 16% are trucks.

How long is SR-39 over Heron Branch?

The structure is 31 ft (9.6 m) long with a longest span of 10 ft (3.2 m).

Who owns SR-39 over Heron Branch?

It is owned by the State Highway Agency.