Structure 150088 · Pinellas County, FL

I-275 SB over 30th AVE North

Carries I-275 SB over 30th AVE North, 1.5 Mi North Of Sr-595.

Overall conditionGood

Set by its lowest-rated component: Deck and Superstructure and Substructure at 7 of 9.

How ratings work
Decksets the rating7/9 · Good
Superstructuresets the rating7/9 · Good
Substructuresets the rating7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT175 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 7/9

175 ft end to end, longest span 80 ft: about 2 semi-trucks nose to tail. Lengths and the semi-truck 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.

Built197452 years old
Length175.2 ft53.4 m
Daily traffic—reported figure implausible
Last inspectedOctober 2023every 24 months

Location

StateFlorida
CountyPinellas
Location1.5 Mi North Of Sr-595
CarriesI-275 SB
Crosses30th AVE North
Coordinates27.79925, -82.66281

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length175.2 ft (53.4 m)
Max Span79.7 ft (24.3 m)
Deck Width59.7 ft (18.2 m)
Deck Area971.9 sq m
Main Spans3
Year Built1974

Traffic

Avg Daily Traffic158,000 (2023)
That is about 52,666 vehicles per lane per day — beyond what any U.S. road carries (the busiest freeways run about 25,000–30,000). It is almost certainly a data-entry error in the National Bridge Inventory, so we leave this bridge out of traffic rankings.
Truck Traffic6%
Lanes On Bridge3
Lanes Under Bridge3

Inspection & Ownership

Last InspectionOctober 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number150088

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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