Structure 33035460001 · Hamilton County, TN

Fau 3546 over Tn River & A231 & A267

Carries Fau 3546 over Tn River & A231 & A267, 0ver Tn Rv In Chattanooga.

Overall conditionFair

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

How ratings work
Deck6/9 · Satisfactory
Superstructure6/9 · Satisfactory
Substructuresets the rating5/9 · Fair
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT2,618 FT OVERALL500 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 6/9Substructure 5/9 · sets the rating

2,618 ft end to end, longest span 420 ft: about 7.3 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.

Built198442 years old
Length2617.8 ft797.9 m
Daily traffic15,172counted 2021
Last inspectedFebruary 2023every 24 months

Location

StateTennessee
CountyHamilton
Location0ver Tn Rv In Chattanooga
CarriesFau 3546
CrossesTn River & A231 & A267
Coordinates35.05397, -85.30355

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length2617.8 ft (797.9 m)
Max Span419.9 ft (128 m)
Deck Width92.8 ft (28.3 m)
Deck Area22580.6 sq m
Main Spans5
Year Built1984

Traffic

Avg Daily Traffic15,172 (2021)
Truck Traffic4%
Lanes On Bridge4
Lanes Under Bridge4

Inspection & Ownership

Last InspectionFebruary 2023
Inspection FrequencyEvery 24 months
OwnerCity/Municipal Highway Agency
Historical SignificanceHistorical significance is not determined
Scour Critical8 — Stable, low risk
Structure Number33035460001

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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