Structure 170022 · Sarasota County, FL

Sr-789 NB over Coon Key Waterway

Carries Sr-789 NB over Coon Key Waterway, 1.4 Mi W Of Us-41.

Overall conditionFair

Set by its lowest-rated component: Deck at 5 of 9.

How ratings work
Decksets the rating5/9 · Fair
Superstructure6/9 · Satisfactory
Substructure6/9 · Satisfactory
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT1,010 FT OVERALL200 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9 · sets the ratingSuperstructure 6/9Substructure 6/9

1,010 ft end to end, longest span 48 ft: about 2.8 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.

Built195868 years old
Length1010.2 ft307.9 m
Daily traffic32,000counted 2025
Last inspectedJanuary 2025every 24 months

Location

StateFlorida
CountySarasota
Location1.4 Mi W Of Us-41
CarriesSr-789 NB
CrossesCoon Key Waterway
Coordinates27.32456, -82.56619

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length1010.2 ft (307.9 m)
Max Span47.9 ft (14.6 m)
Deck Width37.4 ft (11.4 m)
Deck Area3510.1 sq m
Main Spans21
Year Built1958

Traffic

Avg Daily Traffic32,000 (2025)
Truck Traffic4%
Lanes On Bridge2

Inspection & Ownership

Last InspectionJanuary 2025
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical7 — Countermeasures installed
Structure Number170022

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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