US Bridges

SR618A Selmon Expy over 39th ST to 78th ST

Good

Hillsborough County, Florida · 4.7 MI W/O US-301 · Structure no. 100806

Built
2006
19 years old
Condition
Good
inspected August 2024
Type
Segmental Box Girder
Prestressed Concrete Continuous
Length
17,001 ft
122 main spans
Daily traffic
20,500
2024 count
Owner
Toll Authority
State Toll Authority

About this bridge

SR618A Selmon Expy over 39th ST to 78th ST is a prestressed concrete continuous segmental box girder carrying SR618A Selmon Expy over 39th ST to 78th ST in Hillsborough County, Florida. It was built in 2006, so it is 19 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 20,500 vehicles a day, roughly 9% of them trucks, projected to reach 35,465 by 2044. The structure is 17,001 ft (5,181.9 m) long and 60 ft wide.

CarriesSR618A Selmon Expy
Crosses39th ST to 78th ST
Location4.7 MI W/O US-301
RouteState Highway 618
StateFlorida
Coordinates27.95447, -82.41553
Functional classUrban Principal Arterial - Other Freeway or Expressway

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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating71.9 US tons
Inventory rating37.4 US tons

Structure

Structure typeSegmental Box Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans122
Design loadHS 20
Structure length17,001 ft (5,181.9 m)
Longest span142 ft (43.3 m)
Deck width60 ft (18.3 m)
Roadway width56 ft (17 m)
Vertical clearance over deck18 ft (5.6 m)

Traffic and service

Average daily traffic20,500 (2024)
Projected traffic35,465 by 2044
Trucks9%
Lanes on structure3
Traffic directionOne-way traffic
CarriesThird level (interchange)
CrossesHighway, waterway and railroad
Detour if closed—
TollOn a toll road
National Highway SystemYes

Ownership and planned work

OwnerState Toll Authority
Maintained byState Toll Authority
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 SR618A Selmon Expy over 39th ST to 78th ST built?

It was built in 2006, making it 19 years old in 2025.

What condition is SR618A Selmon Expy over 39th ST to 78th ST 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 August 2024.

How much traffic does SR618A Selmon Expy over 39th ST to 78th ST carry?

About 20,500 vehicles per day (2024 count), of which roughly 9% are trucks.

How long is SR618A Selmon Expy over 39th ST to 78th ST?

The structure is 17,001 ft (5,181.9 m) long with a longest span of 142 ft (43.3 m) and a deck 60 ft wide.

Who owns SR618A Selmon Expy over 39th ST to 78th ST?

It is owned by the State Toll Authority.