US Bridges

On-Ramp to Davis I over Hillsborough Bay

Fair

Hillsborough County, Florida · At Bayshore-Davis Island · Structure no. 105625

Built
1966
59 years old
Condition
Fair
inspected February 2025
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
406 ft
6 main spans
Daily traffic
5,001
2025 count
Owner
City
City or Municipal Highway Agency

About this bridge

On-Ramp to Davis I over Hillsborough Bay is a prestressed concrete stringer/multi-beam or girder carrying On-Ramp to Davis I over Hillsborough Bay in Hillsborough County, Florida. It was built in 1966, so it is 59 years old, older than the Florida average of 41.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 5,001 vehicles a day, roughly 5% of them trucks, projected to reach 11,001 by 2047. The structure is 406 ft (123.6 m) long and 22 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesOn-Ramp to Davis I
CrossesHillsborough Bay
LocationAt Bayshore-Davis Island
RouteCity Street 0
CountyHillsborough County
StateFlorida
Coordinates27.93736, -82.46379
Functional classUrban Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionFebruary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating86.4 US tons
Inventory rating50 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans6
Design loadHS 20
Structure length406 ft (123.6 m)
Longest span78 ft (23.8 m)
Deck width22 ft (6.7 m)
Roadway width16 ft (4.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,001 (2025)
Projected traffic11,001 by 2047
Trucks5%
Lanes on structure1
Traffic directionOne-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 On-Ramp to Davis I over Hillsborough Bay built?

It was built in 1966, making it 59 years old in 2025.

What condition is On-Ramp to Davis I over Hillsborough Bay in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in February 2025.

How much traffic does On-Ramp to Davis I over Hillsborough Bay carry?

About 5,001 vehicles per day (2025 count), of which roughly 5% are trucks.

How long is On-Ramp to Davis I over Hillsborough Bay?

The structure is 406 ft (123.6 m) long with a longest span of 78 ft (23.8 m) and a deck 22 ft wide.

Who owns On-Ramp to Davis I over Hillsborough Bay?

It is owned by the City or Municipal Highway Agency.