Structure 870916 · Miami-Dade County, FL

I-75 Exp NB 39.2 over I-75 Sb/turnpike Heft SB

Carries I-75 Exp NB 39.2 over I-75 Sb/turnpike Heft SB, Tpk Heft To I-75 Exprs.

Overall conditionGood

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

How ratings work
Deck9/9 · Excellent
Superstructuresets the rating7/9 · Good
Substructure9/9 · Excellent
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT1,492 FT OVERALL250 FT0ELEVATION · LENGTHS TO SCALE
Deck 9/9Superstructure 7/9 · sets the ratingSubstructure 9/9

1,492 ft end to end, longest span 250 ft: about 4.1 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 box-beam bridge.

Built20179 years old
Length1492.1 ft454.8 m
Daily traffic5,600counted 2023
Last inspectedDecember 2023every 24 months

Location

StateFlorida
CountyMiami-Dade
LocationTpk Heft To I-75 Exprs
CarriesI-75 Exp NB 39.2
CrossesI-75 Sb/turnpike Heft SB
Coordinates25.94938, -80.35186

Physical Characteristics

MaterialSteel Continuous
DesignBox Beam - Multiple
Total Length1492.1 ft (454.8 m)
Max Span250.0 ft (76.2 m)
Deck Width29.9 ft (9.1 m)
Deck Area4138.7 sq m
Main Spans7
Year Built2017

Traffic

Avg Daily Traffic5,600 (2023)
Truck Traffic6%
Lanes On Bridge1
Lanes Under Bridge13

Inspection & Ownership

Last InspectionDecember 2023
Inspection FrequencyEvery 24 months
OwnerState Toll Authority
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number870916

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.

Nearby Bridges