Structure 875105 · Miami-Dade County, FL

NE 123rd Street over Biscayne Bay

Carries NE 123rd Street over Biscayne Bay, 200ft. W Of Toll Plaza.

Overall conditionPoor

Set by its lowest-rated component: Deck and Superstructure at 4 of 9.

How ratings work
Decksets the rating4/9 · Poor
Superstructuresets the rating4/9 · Poor
Substructure7/9 · Good
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT221 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 4/9 · sets the ratingSuperstructure 4/9 · sets the ratingSubstructure 7/9

221 ft end to end, longest span 45 ft: about 3 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 slab bridge.

Built200620 years old
Length221.5 ft67.5 m
Daily traffic22,890counted 2020
Last inspectedFebruary 2025every 24 months

Location

StateFlorida
CountyMiami-Dade
Location200ft. W Of Toll Plaza
CarriesNE 123rd Street
CrossesBiscayne Bay
Coordinates25.88917, -80.15051

Physical Characteristics

MaterialPrestressed Concrete
DesignSlab
Total Length221.5 ft (67.5 m)
Max Span44.6 ft (13.6 m)
Deck Width82.3 ft (25.1 m)
Deck Area1694.2 sq m
Main Spans5
Year Built2006

Traffic

Avg Daily Traffic22,890 (2020)
Truck Traffic2%
Lanes On Bridge4

Inspection & Ownership

Last InspectionFebruary 2025
Inspection FrequencyEvery 24 months
OwnerTown/Township Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure Number875105

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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