US Bridges

SR-583 - 56th ST over Hillsborough Rvr Relief

Fair

Hillsborough County, Florida · 1.7MILES North of US-92 · Structure no. 100266

Built
1963
62 years old
Condition
Fair
inspected June 2023
Type
Culvert
Concrete
Length
25 ft
2 main spans
Daily traffic
42,500
2022 count
Owner
State
State Highway Agency

About this bridge

SR-583 - 56th ST over Hillsborough Rvr Relief is a concrete culvert carrying SR-583 - 56th ST over Hillsborough Rvr Relief in Hillsborough County, Florida. It was built in 1963, 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 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 42,500 vehicles a day, roughly 3% of them trucks, projected to reach 73,738 by 2044. The structure is 25 ft (7.6 m) long. If it were closed, the detour would be 6.2 mi (10 km).

Location

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CarriesSR-583 - 56th ST
CrossesHillsborough Rvr Relief
Location1.7MILES North of US-92
RouteState Highway 583
CountyHillsborough County
StateFlorida
Coordinates28.02278, -82.39345
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
Channel and channel protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating78.3 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadH 15
Structure length25 ft (7.6 m)
Longest span12 ft (3.8 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic42,500 (2022)
Projected traffic73,738 by 2044
Trucks3%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesRelief for waterway
Detour if closed6.2 mi (10 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was SR-583 - 56th ST over Hillsborough Rvr Relief built?

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

What condition is SR-583 - 56th ST over Hillsborough Rvr Relief 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 over Hillsborough Rvr Relief carry?

About 42,500 vehicles per day (2022 count), of which roughly 3% are trucks.

How long is SR-583 - 56th ST over Hillsborough Rvr Relief?

The structure is 25 ft (7.6 m) long with a longest span of 12 ft (3.8 m).

Who owns SR-583 - 56th ST over Hillsborough Rvr Relief?

It is owned by the State Highway Agency.