US Bridges

US-301(SR-41) over Hillsborough River

Good

Hillsborough County, Florida · 5.2 Miles South of SR-39 · Structure no. 100434

Built
1985
40 years old
Condition
Good
inspected March 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
451 ft
6 main spans
Daily traffic
15,400
2023 count
Owner
State
State Highway Agency

About this bridge

US-301(SR-41) over Hillsborough River is a prestressed concrete stringer/multi-beam or girder carrying US-301(SR-41) over Hillsborough River in Hillsborough County, Florida. It was built in 1985, so it is 40 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 15,400 vehicles a day, roughly 12% of them trucks, projected to reach 26,719 by 2042. The structure is 451 ft (137.6 m) long and 48 ft wide. If it were closed, the detour would be 7.5 mi (12 km).

Location

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CarriesUS-301(SR-41)
CrossesHillsborough River
Location5.2 Miles South of SR-39
RouteU.S. Route 301
CountyHillsborough County
StateFlorida
Coordinates28.14992, -82.22114
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
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
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 rating58 US tons
Inventory rating51 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans6
Design loadHS 20 + Mod
Structure length451 ft (137.6 m)
Longest span75 ft (22.9 m)
Deck width48 ft (14.5 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15,400 (2023)
Projected traffic26,719 by 2042
Trucks12%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed7.5 mi (12 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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost$79,000
NavigationNo navigation control on waterway

Frequently asked questions

When was US-301(SR-41) over Hillsborough River built?

It was built in 1985, making it 40 years old in 2025.

What condition is US-301(SR-41) over Hillsborough River 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 March 2023.

How much traffic does US-301(SR-41) over Hillsborough River carry?

About 15,400 vehicles per day (2023 count), of which roughly 12% are trucks.

How long is US-301(SR-41) over Hillsborough River?

The structure is 451 ft (137.6 m) long with a longest span of 75 ft (22.9 m) and a deck 48 ft wide.

Who owns US-301(SR-41) over Hillsborough River?

It is owned by the State Highway Agency.