US Bridges

I-75 NB (SR-93A) over Morris Bridge (CR-579)

Good

Hillsborough County, Florida · 1MI North of SR-582 · Structure no. 100420

Built
1982
43 years old, rebuilt 2013
Condition
Good
inspected November 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
231 ft
4 main spans
Daily traffic
64,500
2023 count
Owner
State
State Highway Agency

About this bridge

I-75 NB (SR-93A) over Morris Bridge (CR-579) is a prestressed concrete stringer/multi-beam or girder carrying I-75 NB (SR-93A) over Morris Bridge (CR-579) in Hillsborough County, Florida. It was built in 1982 and reconstructed in 2013, so it is 43 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 64,500 vehicles a day, roughly 15% of them trucks, projected to reach 80,625 by 2042. The structure is 231 ft (70.5 m) long and 83 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI-75 NB (SR-93A)
CrossesMorris Bridge (CR-579)
Location1MI North of SR-582
RouteInterstate 75
CountyHillsborough County
StateFlorida
Coordinates28.07036, -82.35261
Functional classUrban Principal Arterial - Interstate

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.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36.7 US tons
Inventory rating24.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length231 ft (70.5 m)
Longest span84 ft (25.5 m)
Deck width83 ft (25.4 m)
Roadway width80 ft (24.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic64,500 (2023)
Projected traffic80,625 by 2042
Trucks15%
Lanes on structure5
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-75 NB (SR-93A) over Morris Bridge (CR-579) built?

It was built in 1982, making it 43 years old in 2025. It was reconstructed in 2013.

What condition is I-75 NB (SR-93A) over Morris Bridge (CR-579) 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 November 2023.

How much traffic does I-75 NB (SR-93A) over Morris Bridge (CR-579) carry?

About 64,500 vehicles per day (2023 count), of which roughly 15% are trucks.

How long is I-75 NB (SR-93A) over Morris Bridge (CR-579)?

The structure is 231 ft (70.5 m) long with a longest span of 84 ft (25.5 m) and a deck 83 ft wide.

Who owns I-75 NB (SR-93A) over Morris Bridge (CR-579)?

It is owned by the State Highway Agency.