Structure 100234 · Hillsborough County, FL

I-275 NB over Sinkhole

Carries I-275 NB over Sinkhole, 0.6mi N Of Sr-582.

Overall conditionFair

Set by its lowest-rated component: Deck at 6 of 9.

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructure7/9 · Good
Substructure8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT77 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 7/9Substructure 8/9

77 ft end to end. Lengths and the car on the deck are drawn to the same scale. Each part is colored by its latest inspection rating. The inventory records lengths but not heights or the layout of the shorter spans, so those are drawn as typical for a multi-beam bridge.

Built1966rebuilt 2002
Length76.8 ft23.4 m
Daily traffic62,000counted 2024
Last inspectedMay 2024every 24 months

Location

StateFlorida
CountyHillsborough
Location0.6mi N Of Sr-582
CarriesI-275 NB
CrossesSinkhole
Coordinates28.06359, -82.45461

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length76.8 ft (23.4 m)
Max Span76.8 ft (23.4 m)
Deck Width56.8 ft (17.3 m)
Deck Area404.8 sq m
Main Spans1
Year Built1966 (reconstructed 2002)

Traffic

Avg Daily Traffic62,000 (2024)
Truck Traffic6%
Lanes On Bridge3

Inspection & Ownership

Last InspectionMay 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number100234

How Bridge Ratings Work

Inspectors rate each major part of a bridge (the deck you drive on, the superstructure of beams that holds it up, and the substructure of piers and abutments beneath) on a 0–9 scale. A bridge's overall condition is its lowest of those ratings, so one deteriorated component makes the whole bridge "poor."

0Failed
1Imminent failure
2Critical
3Serious
4Poor
5Fair
6Satisfactory
7Good
8Very good
9Excellent
Good · lowest component 7–9
Fair · lowest component 5–6
Poor · lowest component 0–4

A poor rating is not a closure. It means the bridge is flagged for priority repair or replacement; bridges judged unsafe are closed or posted with weight limits. The waterway (channel) rating is reported, but it does not count toward the overall classification.

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