US Bridges

CR-39 over Alafia River (so. Prong)

Good

Hillsborough County, Florida · 4.9MI South of SR-60 · Structure no. 104800

Built
2010
15 years old
Condition
Good
inspected January 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
315 ft
5 main spans
Daily traffic
10,000
2024 count
Owner
County
County Highway Agency

About this bridge

CR-39 over Alafia River (so. Prong) is a prestressed concrete stringer/multi-beam or girder carrying CR-39 over Alafia River (so. Prong) in Hillsborough County, Florida. It was built in 2010, so it is 15 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 10,000 vehicles a day, roughly 2% of them trucks, projected to reach 17,500 by 2044. The structure is 315 ft (96 m) long and 55 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesCR-39
CrossesAlafia River (so. Prong)
Location4.9MI South of SR-60
RouteCounty Highway 39
StateFlorida
Coordinates27.86656, -82.14392
Functional classRural Major Collector

Condition and inspection

Good

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating54.3 US tons
Inventory rating41.7 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans5
Design loadHL 93
Structure length315 ft (96 m)
Longest span63 ft (19.2 m)
Deck width55 ft (16.8 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,000 (2024)
Projected traffic17,500 by 2044
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 CR-39 over Alafia River (so. Prong) built?

It was built in 2010, making it 15 years old in 2025.

What condition is CR-39 over Alafia River (so. Prong) 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 January 2024.

How much traffic does CR-39 over Alafia River (so. Prong) carry?

About 10,000 vehicles per day (2024 count), of which roughly 2% are trucks.

How long is CR-39 over Alafia River (so. Prong)?

The structure is 315 ft (96 m) long with a longest span of 63 ft (19.2 m) and a deck 55 ft wide.

Who owns CR-39 over Alafia River (so. Prong)?

It is owned by the County Highway Agency.