Structure 84014740001 · Tipton County, TN

Nfa 1474 (sa 8430) over Overflow

Carries Nfa 1474 (sa 8430) over Overflow, 0.1 Mi N Of Fayette Co..

Overall conditionGood

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

How ratings work
Culvertsets the rating7/9 · Good
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT39 FT ACROSS25 FT0ELEVATION · LENGTHS TO SCALE
Culvert 7/9

A culvert 39 ft across with 3 openings. 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.

Built199135 years old
Length39.0 ft11.9 m
Daily traffic242counted 2021
Last inspectedMarch 2024every 24 months

Location

StateTennessee
CountyTipton
Location0.1 Mi N Of Fayette Co.
CarriesNfa 1474 (sa 8430)
CrossesOverflow
Coordinates35.40583, -89.52789

Physical Characteristics

MaterialConcrete Continuous
DesignCulvert
Total Length39.0 ft (11.9 m)
Max Span12.1 ft (3.7 m)
Deck Width33.5 ft (10.2 m)
Deck Area121.4 sq m
Main Spans3
Year Built1991

Traffic

Avg Daily Traffic242 (2021)
Truck Traffic3%
Lanes On Bridge2

Inspection & Ownership

Last InspectionMarch 2024
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number84014740001

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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