Structure 100459 · Hillsborough County, FL

Sr618 Selmon WB over Cr-573 78th ST & Palm R

Carries Sr618 Selmon WB over Cr-573 78th ST & Palm R, 0.1mi South Of Sr-60.

Overall conditionFair

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

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructure7/9 · Good
Substructure7/9 · Good
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT1,457 FT OVERALL250 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 7/9Substructure 7/9

1,457 ft end to end, longest span 74 ft: about 4.0 football fields. 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.

Built198145 years old
Length1456.7 ft444 m
Daily traffic38,750counted 2022
Last inspectedAugust 2023every 24 months

Location

StateFlorida
CountyHillsborough
Location0.1mi South Of Sr-60
CarriesSr618 Selmon WB
CrossesCr-573 78th ST & Palm R
Coordinates27.95069, -82.37217

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length1456.7 ft (444 m)
Max Span74.1 ft (22.6 m)
Deck Width39.0 ft (11.9 m)
Deck Area5283.6 sq m
Main Spans24
Year Built1981

Traffic

Avg Daily Traffic38,750 (2022)
Truck Traffic7%
Lanes On Bridge2
Lanes Under Bridge5

Inspection & Ownership

Last InspectionAugust 2023
Inspection FrequencyEvery 24 months
OwnerState Toll Authority
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure Number100459

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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