Structure 79FA3120001 · Shelby County, TN

Fau 277 299606w over B812 & Cnic Rr

Carries Fau 277 299606w over B812 & Cnic Rr, 0.4 Mi N Of Sr-4 Jct..

Overall conditionFair

Set by its lowest-rated component: Deck at 6 of 9.

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructure7/9 · Good
Substructure7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT241 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 7/9Substructure 7/9

241 ft end to end, longest span 69 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 box-beam bridge.

Built199234 years old
Length241.1 ft73.5 m
Daily traffic32,865counted 2021
Last inspectedJanuary 2025every 24 months

Location

StateTennessee
CountyShelby
Location0.4 Mi N Of Sr-4 Jct.
CarriesFau 277 299606w
CrossesB812 & Cnic Rr
Coordinates35.11192, -89.98469

Physical Characteristics

MaterialPrestressed Concrete Continuous
DesignBox Beam - Single/Spread
Total Length241.1 ft (73.5 m)
Max Span68.9 ft (21 m)
Deck Width55.4 ft (16.9 m)
Deck Area1242.2 sq m
Main Spans4
Year Built1992

Traffic

Avg Daily Traffic32,865 (2021)
Truck Traffic9%
Lanes On Bridge4
Lanes Under Bridge1

Inspection & Ownership

Last InspectionJanuary 2025
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceHistorical significance is not determined
Scour CriticalNot applicable
Structure Number79FA3120001

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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