Structure 270A0440005 · Gibson County, TN

Nfa A044 over Overflow-cow Creek

Carries Nfa A044 over Overflow-cow Creek, 3.0 Mi SW Jct Sr5&sr77.

Overall conditionPoor

Set by its lowest-rated component: Substructure at 4 of 9.

How ratings work
Deck7/9 · Good
Superstructure6/9 · Satisfactory
Substructuresets the rating4/9 · Poor
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT38 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 6/9Substructure 4/9 · sets the rating

38 ft end to end, longest span 19 ft. 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 or the layout of the shorter spans, so those are drawn as typical for a channel-beam bridge.

Built1972rebuilt 2006
Length38.1 ft11.6 m
Daily traffic100counted 2020
Last inspectedJuly 2023every 24 months

Location

StateTennessee
CountyGibson
Location3.0 Mi SW Jct Sr5&sr77
CarriesNfa A044
CrossesOverflow-cow Creek
Coordinates36.07067, -89.04653

Physical Characteristics

MaterialConcrete
DesignChannel Beam
Total Length38.1 ft (11.6 m)
Max Span19.0 ft (5.8 m)
Deck Width25.3 ft (7.7 m)
Deck Area89.3 sq m
Main Spans2
Year Built1972 (reconstructed 2006)

Traffic

Avg Daily Traffic100 (2020)
Truck Traffic2%
Lanes On Bridge2

Inspection & Ownership

Last InspectionJuly 2023
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceHistorical significance is not determined
Scour Critical5 — Stable for scour
Structure Number270A0440005

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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