US Bridges

SR-583 56th ST NB over Hillsborough River

Fair

Hillsborough County, Florida · 1.8 Miles North of US-92 · Structure no. 100268

Built
1963
62 years old, rebuilt 1992
Condition
Fair
inspected June 2023
Type
Slab
Prestressed Concrete
Length
350 ft
14 main spans
Daily traffic
21,250
2022 count
Owner
State
State Highway Agency

About this bridge

SR-583 56th ST NB over Hillsborough River is a prestressed concrete slab carrying SR-583 56th ST NB over Hillsborough River in Hillsborough County, Florida. It was built in 1963 and reconstructed in 1992, so it is 62 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 5 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 21,250 vehicles a day, roughly 3% of them trucks, projected to reach 36,869 by 2044. The structure is 350 ft (106.8 m) long and 37 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesSR-583 56th ST NB
CrossesHillsborough River
Location1.8 Miles North of US-92
RouteState Highway 583
CountyHillsborough County
StateFlorida
Coordinates28.02443, -82.39335
Functional classUrban Minor Arterial

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating77.1 US tons
Inventory rating48 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans14
Design loadH 15
Structure length350 ft (106.8 m)
Longest span25 ft (7.7 m)
Deck width37 ft (11.4 m)
Roadway width29 ft (8.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic21,250 (2022)
Projected traffic36,869 by 2044
Trucks3%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemNo

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$97,000
NavigationNo navigation control on waterway

Frequently asked questions

When was SR-583 56th ST NB over Hillsborough River built?

It was built in 1963, making it 62 years old in 2025. It was reconstructed in 1992.

What condition is SR-583 56th ST NB over Hillsborough River 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 June 2023.

How much traffic does SR-583 56th ST NB over Hillsborough River carry?

About 21,250 vehicles per day (2022 count), of which roughly 3% are trucks.

How long is SR-583 56th ST NB over Hillsborough River?

The structure is 350 ft (106.8 m) long with a longest span of 25 ft (7.7 m) and a deck 37 ft wide.

Who owns SR-583 56th ST NB over Hillsborough River?

It is owned by the State Highway Agency.