Structure 870945 · Miami-Dade County, FL

SR 821 NB Rp 27.3 over Snapper Creek Canal

Carries SR 821 NB Rp 27.3 over Snapper Creek Canal, NB On Ramp NW 12th ST.

Overall conditionGood

Set by its lowest-rated component: Culvert at 8 of 9.

How ratings work
Culvertsets the rating8/9 · Very Good
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT33 FT ACROSS25 FT0ELEVATION · LENGTHS TO SCALE
Culvert 8/9

A culvert 33 ft across. Lengths and the car 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, so those are drawn as typical for a culvert.

Built20215 years old
Length33.5 ft10.2 m
Daily traffic3,000counted 2021
Last inspectedSeptember 2023every 24 months

Location

StateFlorida
CountyMiami-Dade
LocationNB On Ramp NW 12th ST
CarriesSR 821 NB Rp 27.3
CrossesSnapper Creek Canal
Coordinates25.78689, -80.38487

Physical Characteristics

MaterialAluminum/Wrought Iron/Cast Iron
DesignCulvert
Total Length33.5 ft (10.2 m)
Max Span33.5 ft (10.2 m)
Deck Width20.0 ft (6.1 m)
Deck Area62.2 sq m
Main Spans1
Year Built2021

Traffic

Avg Daily Traffic3,000 (2021)
Truck Traffic5%
Lanes On Bridge1

Inspection & Ownership

Last InspectionSeptember 2023
Inspection FrequencyEvery 24 months
OwnerState Toll Authority
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number870945

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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