Structure 170132 · Sarasota County, FL

I-75 NB over Big Slough Canal

Carries I-75 NB over Big Slough Canal, 0.3mi N Of Sumter BLVD.

Overall conditionFair

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

How ratings work
Deck7/9 · Good
Superstructure7/9 · Good
Substructuresets the rating6/9 · Satisfactory
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT540 FT OVERALL100 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 6/9 · sets the rating

540 ft end to end, longest span 60 ft: about 1.5 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.

Built1981rebuilt 2003
Length540.0 ft164.6 m
Daily traffic36,000counted 2023
Last inspectedMarch 2025every 24 months

Location

StateFlorida
CountySarasota
Location0.3mi N Of Sumter BLVD
CarriesI-75 NB
CrossesBig Slough Canal
Coordinates27.09954, -82.20932

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length540.0 ft (164.6 m)
Max Span60.0 ft (18.3 m)
Deck Width59.1 ft (18 m)
Deck Area2962.8 sq m
Main Spans9
Year Built1981 (reconstructed 2003)

Traffic

Avg Daily Traffic36,000 (2023)
Truck Traffic13%
Lanes On Bridge3

Inspection & Ownership

Last InspectionMarch 2025
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical7 — Countermeasures installed
Structure Number170132

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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